Weather in June

As June rolls in, average temperatures begin to rise, typically ranging from 12°C to 20°C. This increase creates a vibrant environment for plant growth. Many annuals and perennials burst into bloom, adding vibrant colour to gardens. Gardeners should take advantage of the warmth by planting summer vegetables like tomatoes, cucumbers, and peppers. These heat-loving plants thrive in June’s sunny conditions, setting the stage for a bountiful harvest.

Lengthening Daylight Hours

With around 16 to 17 hours of daylight, June provides ample sunlight for plants to photosynthesise effectively. This boost in sunlight plays a crucial role in the vigorous growth of flowering plants and vegetables. Gardeners should strategically position their plants to maximise exposure to this abundant light, especially for sun-loving varieties.

Rainfall Patterns

June can also experience variable rainfall, typically averaging between 60 and 80 mm. Though occasional showers benefit plants, heavy downpours can pose challenges. Good drainage is essential; check your garden beds for signs of waterlogging, as prolonged wet conditions can harm root systems. If rainfall is sparse, ensure regular watering to keep plants hydrated, particularly for newly planted beds or containers.

Pest Management

The warming weather prompts an increase in pests and diseases. Take time to monitor your plants for signs of trouble, like aphids, slugs, and snails. Regular checks can help catch infestations early, allowing for timely intervention. Introduce beneficial insects, such as ladybirds, or apply organic solutions to tackle pest problems without harming the environment.

Soil Considerations

The soil in June warms up, encouraging healthy root development. Gardeners should consider testing soil pH and nutrient levels before fertilising. Adding organic matter, such as compost, enhances soil structure, providing essential nutrients for robust plant growth. This is particularly important for vegetable patches, where nutrient uptake directly impacts crop yield.

Preparing for the Summer Heat

While June can be pleasantly warm, some days may bring unexpected heatwaves. Be ready to protect plants during excessively hot periods. Applying mulch can help retain soil moisture and regulate soil temperature, shielding plant roots from extreme heat.

Enjoy the Garden

Finally, take time to relish the joys of your garden in June. The combination of blooming flowers and abundant harvests creates a festive atmosphere. Host gatherings to share your garden’s bounty, celebrating the results of your hard work.

In summary, June’s weather in the UK provides unique opportunities and challenges for gardeners. By embracing the warmth, maximising sunlight, managing rainfall, controlling pests, enriching soil, and enjoying the fruits of your labour, you can cultivate a thriving, colourful garden this summer. 

General Considerations for Gardening in June

June marks a lively and vibrant time for gardeners in the UK, as the arrival of summer brings longer days, warmer temperatures, and the flourishing of plants. To ensure your garden thrives during this crucial month, here are some key considerations for gardening in June.

Embrace the Growing Season

As temperatures rise, many plants begin to thrive and flower. This is the time to appreciate your early spring efforts and watch your garden come to life. Keep a close eye on your garden’s needs, as the combination of warmth and moisture can lead to rapid growth. Ensure that your plants receive adequate support, particularly for tall varieties like sunflowers and tomatoes, which may require staking.

Regular Watering

With longer daylight hours, watering becomes increasingly important in June. As the soil warms up, moisture can evaporate quickly. Aim to water early in the morning or late in the evening to minimise evaporation and allow your plants to absorb water effectively. Pay close attention to pots and containers, as they can dry out much quicker than in-ground beds.

Weeding and Maintenance

With the growing season in full swing, weeds can also flourish. Regular weeding is essential to keep your garden healthy. Set aside time each week to check for unwanted plants, ensuring they don’t compete with your flowers and vegetables for nutrients. Consider mulching to suppress weeds, retain moisture, and enhance the aesthetic appeal of your garden.

Fertilisation

June is a crucial month for fertilising your plants. As they enter their peak growth phase, providing the right nutrients will significantly impact their performance. Use a balanced fertiliser for vegetables and flowering plants, following the manufacturer’s instructions for application rates. This practice helps to ensure robust growth and abundant blooms.

Pruning and Deadheading

As many flowering plants continue to bloom, deadheading is vital for maintaining a beautiful garden. Removing spent flowers encourages more blooms, keeping your garden looking fresh and vibrant. Additionally, consider light pruning for shrubs and hedges that have outgrown their space; this can promote bushier growth while enhancing shape.

Plan for Summer Crops

June also serves as an excellent time to plan for summer crops. Consider sowing fast-maturing vegetables like beans and courgettes, along with herbs such as basil and dill. This proactive approach ensures a continuous harvest throughout the summer months.

Enjoy Your Garden

Finally, take time to enjoy the beauty of your garden. June’s warmer weather makes it perfect for outdoor gatherings with family and friends. Create seating areas where you can relax and admire your hard work, perhaps with a lovely picnic or a small garden party.

In summary, June offers a wealth of opportunities and responsibilities for UK gardeners. By embracing the growing season, watering regularly, maintaining your garden, fertilising thoughtfully, deadheading blooms, planning for summer crops, and enjoying the fruits of your labour, you can ensure a colourful and thriving garden that flourishes throughout the summer.

Lawns

Your lawn is the centrepiece of your garden, and June is a critical month for keeping it looking lush and green. With regular mowing, feeding, and watering, you can ensure your lawn stays healthy throughout the summer.

Mowing and Edging

In June, your lawn will be growing quickly, so it’s important to mow it regularly to keep it looking neat and tidy. Aim to mow at least once a week, but don’t cut the grass too short—removing only the top third of the grass blades helps to keep the lawn healthy and encourages strong root growth. If you haven’t edged your lawn yet this year, now is the time to do it. A well-edged lawn looks neat and tidy and helps to keep grass from encroaching into borders and paths.

Feeding and Weeding

June is the perfect time to feed your lawn with a high-nitrogen summer lawn fertiliser. This will promote lush, green growth and help your lawn recover from the winter months. You may also notice weeds starting to appear as the weather warms up. Use a weed and feed product to tackle both weeds and feed the grass at the same time. If you prefer to avoid chemicals, consider removing weeds by hand or using an organic based weed killer.

Watering and Drought Management

Although June usually brings plenty of rain, it’s important to keep an eye on your lawn during dry spells. Lawns that are newly sown or have been recently reseeded are particularly vulnerable to drought. If the weather is dry, water your lawn in the early morning or evening to reduce evaporation. Established lawns can usually cope with short periods of drought, but regular watering during prolonged dry spells will help keep them green and healthy.

Aeration and Scarification

If your lawn is looking a bit tired or compacted, June is a good time to aerate it. Aeration helps to relieve compaction, improve drainage, and allow air, water, and nutrients to reach the grass roots. You can aerate your lawn using a garden fork or a mechanical aerator. Scarifying, or raking out dead grass and moss, can also help to rejuvenate your lawn. However, be careful not to scarify too vigorously, as this can damage the grass.

Dealing with Lawn Pests

June is a time when lawn pests such as leatherjackets (the larvae of crane flies) and chafer grubs can become a problem. These pests feed on the roots of your grass, causing yellow patches and poor growth. If you suspect a pest problem, treat your lawn with a biological control, such as nematodes, which are available from garden centres and online. Regular monitoring and prompt action can help prevent serious damage to your lawn.

Roses

Roses are the quintessential garden flower, known for their beauty and fragrance. June is a crucial month for rose care, as plants are in full bloom and require regular attention to keep them looking their best.

Deadheading and Pruning

By June, your roses should be in full bloom. To keep them flowering throughout the summer, it’s important to deadhead regularly. Removing spent blooms encourages the plant to produce more flowers and helps to keep your roses looking tidy. Use sharp secateurs to cut just above a leaf with five leaflets, as this is where new shoots are likely to emerge. For repeat-flowering roses, deadheading is essential to prolong the display.

Feeding and Mulching

Roses are heavy feeders, and June is the time to give them a boost with a rose-specific fertiliser. This will provide the nutrients they need to produce a spectacular display of flowers. After feeding, apply a layer of mulch around the base of your roses. Mulching helps to retain moisture, suppress weeds, and improve soil structure. Use well-rotted manure, compost, or a specialist rose mulch, but be sure to keep the mulch away from the stems to prevent rot.

Managing Pests and Diseases

As the weather warms up, pests and diseases can become a problem for roses. Keep an eye out for aphids, which can cluster on new shoots and buds. You can remove them by hand or use a blast of water from the hose, or apply an insecticidal soap. Black spot, mildew, and rust are common fungal diseases that can affect roses in June. Ensure good air circulation around your plants and consider applying a preventative fungicide if your roses are prone to these diseases.

Training and Supporting Climbing Roses

If you have climbing roses, June is the time to train new growth onto supports. Use soft ties to secure the stems to trellises, arches, or walls, and aim to create a fan shape for even coverage. Training climbing roses not only helps to create a more attractive display but also encourages more flowers to form along the length of the stems. Be gentle when tying in new shoots, as they can be easily damaged.

Herbaceous Plants

Herbaceous plants are the backbone of many garden borders, providing colour, texture, and interest throughout the growing season. June is a busy time for herbaceous plants, with plenty of tasks to keep them looking their best.

Deadheading and Pruning

To keep your herbaceous borders looking their best, it’s important to deadhead regularly. Removing spent flowers not only keeps the plants looking tidy but also encourages them to produce more blooms. Some herbaceous perennials, such as delphiniums and lupins, will even produce a second flush of flowers if deadheaded promptly. In addition to deadheading, you may need to do some light pruning to remove any damaged or wayward growth.

Supporting Tall Plants

As herbaceous plants start to put on growth in June, it’s important to provide support for tall or floppy plants. If you haven’t already done so, install plant supports or stakes now, while the plants are still small, to avoid damaging the roots later on. Peony rings, obelisks, and bamboo canes are all useful for keeping plants upright and preventing them from collapsing under the weight of their flowers. As the plants grow, they’ll cover the supports, creating a natural-looking display.

Feeding and Mulching

To keep your herbaceous plants healthy and flowering well, give them a feed in June. Use a balanced fertiliser or a specialist plant food, following the instructions on the packet. After feeding, apply a layer of mulch around the base of the plants. Mulching helps to retain moisture, suppress weeds, and improve soil structure. Use compost, well-rotted manure, or bark chips, and take care not to bury the crowns of the plants, as this can lead to rot.

Managing Pests and Diseases

June is a time when pests and diseases can start to take hold in the garden, so it’s important to keep an eye on your herbaceous plants. Slugs and snails can be a particular problem, especially for young plants. Use organic controls such as beer traps, copper tape, or biological controls, or apply a suitable insecticide if necessary. Fungal diseases such as powdery mildew and rust can also affect herbaceous plants in June. Ensure good air circulation around your plants, and avoid overhead watering to reduce the risk of disease.

Dahlias and Bulbs

Dahlias and summer-flowering bulbs are the stars of the late summer garden, providing a riot of colour when many other plants have finished flowering. June is the time to ensure they’re growing strongly and well-supported.

Caring for Summer-Flowering Bulbs

Summer-flowering bulbs, such as lilies, gladioli, and crocosmia, should be growing strongly by June. Keep the soil around the bulbs weed-free, and apply a balanced fertiliser to encourage strong growth. Water regularly during dry spells, as these bulbs can be thirsty during the growing season. If you’re growing tall varieties such as gladioli, you may need to provide support to prevent them from being blown over by strong winds.

Supporting Tall Blooms

Tall summer-flowering plants such as dahlias, lilies, and gladioli can be prone to flopping over, especially in windy or rainy weather. To prevent this, it’s important to provide support as the plants grow. Use bamboo canes, metal stakes, or a purpose-made plant support to keep the stems upright. Tie the stems to the supports using soft garden twine, and adjust the ties as the plants grow to avoid constricting the stems.

Managing Pests and Diseases

As the weather warms up, pests and diseases can become a problem for dahlias and other summer-flowering bulbs. Keep an eye out for aphids, which can cluster on new shoots and buds. You can remove them by hand or use a blast of water from the hose, or apply an insecticidal soap. Slugs and snails can also be a problem, especially for young plants. Use organic controls such as beer traps, copper tape, or biological controls to keep them at bay. Fungal diseases such as botrytis can affect dahlias and lilies, especially in damp conditions. Ensure good air circulation around your plants, and avoid overhead watering to reduce the risk of disease.

Flowers from Seed

Growing flowers from seed is a rewarding and cost-effective way to fill your garden with colour. June is the time to sow biennials and perennials, as well as to care for any seedlings that were started earlier in the spring.

Sowing Biennials and Perennials

June is a great time to sow biennials such as foxgloves, wallflowers, and sweet williams. These plants will grow over the summer, establish strong root systems, and then flower the following year. Prepare a seedbed by removing any weeds and raking the soil to a fine tilth. Sow the seeds thinly in rows, cover with a light layer of soil, and water gently. Keep the seedbed moist until the seeds germinate, and thin the seedlings as they grow to prevent overcrowding.

Perennials such as delphiniums, lupins, and hollyhocks can also be sown in June. These plants may take a year or more to reach maturity, but they will reward you with years of beautiful flowers. Sow the seeds in pots or trays filled with seed compost, and place them in a warm, bright spot. Once the seedlings have two sets of true leaves, they can be pricked out and potted on into larger containers. Harden off the young plants by gradually acclimatising them to outdoor conditions before planting them out in the garden.

Thinning and Transplanting Seedlings

If you sowed seeds earlier in the spring, your seedlings should be well on their way by June. It’s important to thin out the seedlings to prevent overcrowding, which can lead to poor growth and disease. Follow the spacing recommendations on the seed packet, and remove any weak or overcrowded seedlings. You can use the thinned-out seedlings to fill gaps in your garden or share them with friends and neighbours.

Deadheading and Pruning

To keep your garden looking its best, it’s important to deadhead and prune regularly. Removing spent flowers not only keeps the plants looking tidy but also encourages them to produce more blooms. Some plants, such as sweet peas and cosmos, will flower continuously if deadheaded regularly. In addition to deadheading, you may need to do some light pruning to remove any damaged or wayward growth. This helps to maintain the shape of the plant and promotes healthy growth.

Feeding and Watering

Seedlings and young plants need plenty of nutrients to grow strong and healthy. Feed your seedlings regularly with a balanced liquid fertiliser, following the instructions on the packet. Watering is also important, especially during dry spells. Water the soil rather than the leaves to prevent disease, and aim to keep the soil consistently moist but not waterlogged.

Vegetable Garden

As June arrives in the UK, vegetable gardens are in full swing, bursting with growth and potential. This month offers a myriad of opportunities to ensure your plants thrive and produce an abundant harvest. With longer days and warming temperatures, it’s time to roll up your sleeves and dive into crucial tasks that will keep your garden flourishing. Here’s what you need to focus on with your vegetables this June.

Planting and Sowing

June is the perfect time to continue sowing quick-growing vegetables. Consider planting French beans, runner beans, sweetcorn, and outdoor cucumbers directly into well-prepared soil. Make sure to sow your beans in rows spaced about 45cm apart, allowing for ample room to grow. For sweetcorn, plant in blocks to ensure good pollination; planting them at least 45cm apart will support a healthy harvest.

Care for Established Plants

As your vegetable garden establishes itself, regular care becomes vital. Watering your plants consistently is crucial, especially during dry spells. Ensure that your soil remains moist but not waterlogged. Applying a layer of mulch around your plants will help retain moisture and suppress weeds, which can compete for nutrients.

Check on your tomatoes, courgettes, and peppers, which need support as they grow. Use stakes or cages for tomatoes and tie up the stems of your courgettes to prevent them from sprawling. These actions will not only keep your plants neat but also improve air circulation around them, reducing the risk of disease.

Pest and Disease Control

June can bring an increase in pests like aphids, caterpillars, and slugs. Regularly inspect your plants and take action if you spot any infestations. Hand-picking pests or using organic options like neem oil can help manage populations without harming beneficial insects. Additionally, keep an eye out for signs of disease, such as yellowing leaves or unusual spots, and remove affected plant parts promptly to prevent spreading.

Harvesting

By the end of June, many gardeners will start to enjoy their first harvests. Keep an eye on your salad crops, radishes, and young courgettes. Regular harvesting encourages further growth and provides a continual supply of fresh vegetables for your kitchen.

Prepare for the Next Phase

As June progresses, start thinking about late summer crops. Sow autumn broccoli, turnips, and kohlrabi in the latter part of the month. Preparing for future planting now will ensure your vegetable garden remains productive throughout the year.

Alpines

Alpines are small, hardy plants that thrive in well-drained soil and sunny conditions. They’re perfect for rock gardens, gravel gardens, or containers, and June is an important month for their care.

Caring for Established Alpines

If you have established alpines in your garden, June is the time to give them a bit of extra care. Remove any dead or damaged leaves, and trim back any leggy growth to keep the plants compact and tidy. Alpines can be prone to rotting in wet conditions, so make sure the soil around them is free-draining and not waterlogged. If necessary, top up the gravel or grit around the plants to improve drainage and prevent water from pooling around the roots.

Planting New Alpines

June is a great time to plant new alpines, as the soil is warm and the plants have plenty of time to establish before the heat of summer. Choose a sunny spot with well-drained soil, and prepare the planting area by removing any weeds and adding grit or sand to improve drainage. Plant the alpines at the same depth they were in their pots, and space them out to allow for good air circulation. Water the plants in well after planting, but be careful not to overwater, as alpines are prone to rot in soggy conditions.

Managing Soil and Drainage

Alpines need excellent drainage to thrive, so it’s important to ensure that the soil remains free-draining. If your garden soil is heavy or clay-based, consider building raised beds or mounds to improve drainage. You can also add grit or sand to the planting area to enhance soil structure. In very wet areas, it might be worth installing drainage pipes or channels to divert excess water away from your alpines. Regularly check the soil around your alpines, and if you notice any signs of water-logging, take action to improve drainage.

Managing Pests and Diseases

Alpines are generally low-maintenance plants, but they can be susceptible to a few common problems. Watch out for pests such as slugs and snails, which can damage young plants. Use organic controls such as beer traps, copper tape, or biological controls to keep them at bay. Alpines can also be prone to fungal diseases, especially in damp conditions. Ensure good air circulation around the plants and avoid overhead watering to reduce the risk of disease. If you notice any signs of disease, remove the affected parts of the plant and dispose of them carefully.

Water Plants and Ponds

A well-maintained pond can be a stunning focal point in your garden, providing a habitat for wildlife and a tranquil space for relaxation. June is the time to ensure your pond and water plants are thriving.

Caring for Pond Plants

By June, your pond plants should be growing strongly. Ensure that your marginal and aquatic plants are well-established and healthy. If your pond has water lilies, make sure they have enough space to grow. If they’re overcrowded, consider thinning them out to allow for better growth and light penetration. Regularly remove any dead or yellowing leaves to keep the water clean and free of debris.

Maintaining Water Quality

As the weather warms up, it’s important to maintain good water quality in your pond. Algae can become a problem in June, especially in ponds that receive a lot of sunlight. To prevent algae growth, consider adding floating plants such as water lilies or oxygenating plants like hornwort (Ceratophyllum demersum), which help to shade the water and reduce nutrient levels. You can also use a barley straw pond treatment or an algicide to control algae growth. Regularly monitor the water quality in your pond, and take action if necessary to maintain a healthy environment for your plants and wildlife.

Encouraging Wildlife

A pond can attract a wide range of wildlife to your garden, from frogs and newts to dragonflies and birds. To encourage wildlife, make sure your pond has a variety of habitats, including shallow areas, deep water, and plenty of plants. Avoid using chemicals that could harm wildlife, and instead focus on maintaining a natural balance in your pond. If you have fish in your pond, be careful not to overstock it, as this can lead to poor water quality and reduce the habitat available for other wildlife.

Greenhouses

A greenhouse is a valuable asset for any gardener, allowing you to extend the growing season and provide a protected environment for tender plants. June is a busy month in the greenhouse as seedlings and young plants start to take off.

Ventilation and Temperature Control

As the days warm up, it’s essential to monitor the temperature in your greenhouse. On sunny days, the temperature can rise rapidly, so make sure to ventilate by opening vents or doors to prevent overheating. If your greenhouse has automatic vent openers, check that they are functioning correctly. You can also use shading, such as netting or whitewash, to reduce the amount of direct sunlight entering the greenhouse. This helps to prevent your plants from getting scorched and keeps the greenhouse at a more stable temperature.

Watering and Feeding

Plants in greenhouses can dry out quickly, so regular watering is essential, especially as the weather warms up. Water in the morning to give your plants a good drink before the heat of the day, and avoid watering in the evening, as this can lead to damp conditions that encourage disease. It’s also important to feed your plants regularly, as they’ll be growing rapidly in the warm conditions. Use a liquid feed or a slow-release fertiliser, following the instructions on the packet, to keep your plants healthy and productive.

Managing Pests and Diseases

Greenhouses can be a haven for pests such as aphids, whiteflies, and spider mites, especially as the weather warms up. Regularly inspect your plants for any signs of pests, and deal with them promptly using insecticidal soap or neem oil. For larger infestations, you may need to quarantine the affected plant to prevent the pests from spreading to your other plants. Good hygiene is also important in the greenhouse—clean up any dead leaves or debris, and disinfect your tools and containers regularly to prevent the spread of disease.

Shrubs

Shrubs provide structure and form to the garden, offering year-round interest with their foliage, flowers, and berries. June is an important month for shrub care, from pruning to feeding and planting.

Pruning and Shaping

By June, many shrubs will have finished their first flush of growth, and it’s a good time to prune them back to maintain their shape. For spring-flowering shrubs such as forsythia and flowering currant, prune immediately after they finish blooming to encourage new growth and ensure a good display of flowers the following year. Summer-flowering shrubs such as hydrangeas and lavatera can also be pruned lightly to remove any dead or damaged wood and to shape the plant.

Feeding and Mulching

Shrubs benefit from a feed in June to support their growth throughout the summer. Apply a balanced fertiliser around the base of each shrub, and then mulch with organic material such as compost, leaf mould, or well-rotted manure. Mulching helps to retain moisture, suppress weeds, and improve soil structure. Be sure to keep the mulch away from the base of the shrub to prevent rot.

Planting New Shrubs

If you’re adding new shrubs to your garden, June is a great time to plant them. The soil is warm, and the plants will have time to establish before the heat of summer. Choose a suitable spot for your shrub, considering its mature size and light requirements. Dig a hole that is twice as wide and the same depth as the root ball, and mix in some compost or organic matter. Place the shrub in the hole, backfill with soil, and water well.

Managing Pests and Diseases

Shrubs can be susceptible to a range of pests and diseases, especially as the weather warms up. Keep an eye out for aphids, scale insects, and caterpillars, which can damage the leaves and stems. Use insecticidal soap or neem oil to control pests, or try introducing beneficial insects such as ladybirds to keep the population in check. Fungal diseases such as powdery mildew and leaf spot can also affect shrubs in June. Ensure good air circulation around your plants, and remove any affected leaves to prevent the spread of disease.

Trees

Trees are a long-term investment in your garden, providing shade, structure, and beauty. June is a crucial month for tree care, from pruning to planting new specimens.

Inspecting and Pruning Trees

As trees put on new growth in June, it’s important to inspect them for any signs of damage or disease that may have occurred over the winter. Look for dead or damaged branches, signs of fungal infections, and any evidence of pests such as aphids or caterpillars. Remove any affected areas and dispose of them carefully. If you notice any serious issues, it may be necessary to consult a professional arboriculturist. For trees that bleed sap, such as birch and maple, it’s better to wait until later in the year to prune.

Feeding and Mulching

Trees, especially young or newly planted ones, will benefit from a feed in June to support their growth throughout the season. Apply a slow-release fertiliser around the base of the tree, taking care not to apply it directly against the trunk. After feeding, apply a layer of mulch around the base of the tree to help retain moisture, suppress weeds, and improve soil structure. Mulching also helps to protect the roots from temperature fluctuations and can reduce the risk of damage from lawnmowers or strimmers.

Planting New Trees

If you’re planting a new tree in your garden, June is a good time to do it. Choose a suitable spot with enough space for the tree to grow to its full size, taking into account its mature height and spread. Dig a hole that is at least twice the width of the root ball and the same depth. Loosen the soil at the bottom of the hole to help the roots establish. Place the tree in the hole, backfill with soil, and water well. If the tree is tall or in a windy spot, stake it to prevent it from being damaged by strong winds.

Managing Tree Pests and Diseases

As the weather warms up, tree pests such as aphids, caterpillars, and scale insects can become a problem. Regularly inspect your trees for any signs of pest damage, such as curled or discoloured leaves, and take action promptly. Use insecticidal soap, neem oil, or biological controls to manage pests. Fungal diseases, such as apple scab or powdery mildew, can also affect trees in June. Ensure good air circulation around the tree, remove any affected leaves, and consider applying a fungicide if necessary.

Climbers

Climbers add vertical interest to the garden, covering walls, fences, and trellises with lush foliage and beautiful blooms. June is the time to train, prune, and plant climbers.

Supporting and Training Climbers

As climbers begin their vigorous spring growth, it’s important to provide them with the support they need. Check that trellises, wires, and other supports are secure and strong enough to hold the weight of the growing plant. Gently tie in new shoots using soft garden twine, ensuring that the plant is evenly distributed across the support. This will help to create a balanced and attractive display.

Pruning and Feeding

June is the time to prune early-flowering climbers such as clematis montana and wisteria. For clematis, remove any dead or damaged stems, and trim back the flowering shoots to a pair of strong buds. Wisteria should be pruned back to three buds from the base of the flowering shoots. After pruning, apply a balanced fertiliser to encourage healthy growth and abundant flowering.

Managing Pests and Diseases

Climbers can be susceptible to pests such as aphids, scale insects, and spider mites, especially as the weather warms up. Regularly inspect your plants for any signs of pests, and deal with them promptly using insecticidal soap or neem oil. For larger infestations, you may need to quarantine the affected plant to prevent the pests from spreading to your other plants. Fungal diseases such as powdery mildew can also affect climbers in June. Ensure good air circulation around the plants and avoid overhead watering to reduce the risk of disease.

Planting New Climbers

If you’re planting new climbers, June is an excellent time to do so. Choose a suitable spot with good drainage and plenty of sunlight. Dig a hole that is twice the width of the root ball and mix in some compost or organic matter. Plant the climber at the same depth it was in the pot, and angle it slightly towards the support. Water well and mulch around the base to help retain moisture.

Rhododendrons and Azaleas

Rhododendrons and azaleas are a favourite in UK gardens, known for their vibrant blooms and attractive foliage. June is a key month for their care.

Deadheading and Pruning

As your rhododendrons and azaleas finish flowering, it’s important to deadhead the spent blooms. This prevents the plant from wasting energy on seed production and encourages it to put its energy into producing new growth. Gently snap off the dead flowers just above the first set of leaves, being careful not to damage the new buds that may be forming underneath. If your rhododendrons or azaleas have become overgrown, you can also give them a light prune to shape the plant and remove any dead or damaged wood.

Feeding and Mulching

Rhododendrons and azaleas thrive in acidic soil, so it’s important to feed them with an ericaceous fertiliser in June. This will provide the nutrients they need to produce their stunning flowers. After feeding, apply a layer of mulch around the base of the plants to help retain moisture and suppress weeds. Use organic material such as leaf mould, pine needles, or composted bark, which will also help to maintain the soil’s acidity.

Managing Soil Acidity

Rhododendrons and azaleas require acidic soil to thrive, so it’s important to monitor the pH level of your soil. If your soil is not naturally acidic, you can lower the pH by adding sulphur or using an ericaceous compost. Mulching with acidic materials such as pine needles can also help to maintain the right soil conditions. If you’re planting new rhododendrons or azaleas, consider creating a raised bed filled with ericaceous compost to provide the ideal environment for them.

Controlling Pests and Diseases

Rhododendrons and azaleas can be susceptible to pests such as vine weevils, which can damage the roots and leaves. If you notice notches in the leaves or signs of wilting, it could be a sign of vine weevil damage. Use a biological control such as nematodes to deal with the larvae, and remove any adult weevils by hand. Fungal diseases such as leaf spot and powdery mildew can also affect rhododendrons and azaleas in June. Ensure good air circulation around the plants and remove any affected leaves to prevent the spread of disease.

Hedges

Hedges are an essential feature of many gardens, providing privacy, shelter, and a habitat for wildlife. June is the time to give them the care they need to look their best.

Trimming and Shaping

If your hedges have grown untidy over the spring, June is the time to trim and shape them. Use sharp hedge shears or a hedge trimmer to cut back any overgrown sections, creating a neat, even shape. For formal hedges, use a string line or stakes to guide your trimming and ensure a straight edge.

Feeding and Mulching

After trimming, it’s important to feed your hedge to promote healthy growth. Apply a balanced fertiliser along the base of the hedge, and then mulch with organic material such as compost or well-rotted manure. Mulching helps to retain moisture, suppress weeds, and improve the soil structure. Be sure to keep the mulch away from the stems of the hedge to prevent rot.

Planting New Hedges

If you’re planting a new hedge, June is a great time to do it. Choose a suitable spot with enough space for the hedge to grow to its full size. Dig a trench rather than individual holes, as this will encourage the hedge to grow as a continuous row. Mix in some compost or organic matter, and plant the hedge plants at the same depth they were in the pot. Water well after planting, and mulch around the base to help retain moisture.

Managing Hedge Pests and Diseases

Hedges can be susceptible to pests such as aphids, scale insects, and caterpillars, especially as the weather warms up. Regularly inspect your hedge for any signs of pests, and deal with them promptly using insecticidal soap or neem oil. For larger infestations, you may need to quarantine the affected plant to prevent the pests from spreading to your other plants. Fungal diseases such as powdery mildew can also affect hedges in June. Ensure good air circulation around the plants and avoid overhead watering to reduce the risk of disease.

Fruit

Growing your own fruit is one of the most rewarding aspects of gardening. June is a busy month for fruit growers, with plenty of tasks to ensure a bountiful harvest later in the year.

Thinning Fruits

In June, you may need to thin out the developing fruits on your trees and bushes. Thinning helps to prevent overcrowding, which can lead to smaller, poorer-quality fruit and increase the risk of disease. For apples and pears, aim to leave one or two fruits per cluster, spaced around 10-15 cm apart. For stone fruits such as peaches and plums, thin the fruits so they are around 5-10 cm apart. Thinning may seem harsh, but it will result in larger, healthier fruit at harvest time

Feeding and Mulching

Fruit trees and bushes are hungry plants, so it’s important to feed them in June to support their growth and fruit production. Apply a balanced fertiliser or a specific fruit fertiliser around the base of each plant. After feeding, mulch with organic material such as compost or well-rotted manure. Mulching helps retain moisture, suppress weeds, and improve soil structure. Be sure to keep the mulch away from the base of the plants to prevent rot.

Protecting Fruit from Pests

As the fruit starts to form on your trees and bushes, it’s important to protect it from pests such as birds, insects, and rodents. Use netting or fruit cages to protect your crops from birds, and consider using grease bands or sticky traps to prevent insects from climbing up the trunks of your fruit trees. Regularly check your plants for any signs of pest damage, and take action promptly to prevent further damage.

Harvesting Early Fruits

If you planted strawberries, raspberries, or early varieties of cherries, you should be able to start harvesting in June. Harvest fruits regularly to encourage more to ripen and to prevent them from spoiling. Pick fruits in the morning, when they are at their juiciest, and use or preserve them as soon as possible to enjoy their full flavour.

Houseplants

Houseplants bring greenery and life into the home, and June is a great time to give them some extra care and attention.

Moving Houseplants Outdoors

As the weather warms up, many houseplants can benefit from a spell outdoors in a sheltered spot. The fresh air and natural light will help to strengthen their growth, but be sure to harden them off gradually to avoid shock. Start by placing them outside for a few hours each day, gradually increasing the time they spend outdoors. Choose a shady spot initially, and gradually move them into brighter light if they can tolerate it.

Watering and Feeding

Houseplants need regular watering and feeding, especially as they start to put on new growth in June. Check the soil regularly, and water when the top inch is dry. Use a balanced liquid fertiliser every couple of weeks to provide the nutrients your plants need to thrive. Be careful not to overwater, as this can lead to root rot, and make sure your plants are in well-drained pots.

Managing Light and Temperature

As the days get longer and brighter, your houseplants will need more light to thrive. Move them to a spot where they can get plenty of indirect sunlight, but be careful not to place them in direct sunlight, which can scorch their leaves. If your houseplants are spending time outdoors, make sure they are in a sheltered spot, protected from strong winds and sudden temperature changes. 

Pest and Disease Control

Houseplants can be susceptible to pests such as aphids, spider mites, and mealybugs, especially as the weather warms up. Check your plants regularly for any signs of pests, and deal with them promptly using insecticidal soap or neem oil. For larger infestations, you may need to quarantine the affected plant to prevent the pests from spreading to your other plants. Good hygiene is also important—clean up any dead leaves or debris, and disinfect your tools and containers regularly to prevent the spread of disease.

Patios

A well-maintained patio can be an extension of your living space, providing a place to relax, entertain, and enjoy the garden. June is the time to get your patio ready for the summer months.

Creating Seasonal Displays

To create a stunning seasonal display on your patio, consider planting up containers with summer annuals such as petunias, geraniums, and begonias. These plants will provide a burst of colour throughout the summer and can be easily replaced with autumn flowers later in the year. Consider using a mix of colours and textures to create a visually interesting display, and don’t forget to add some trailing plants to soften the edges of your containers.

Caring for Outdoor Furniture

If you have outdoor furniture on your patio, June is the time to give it a bit of TLC. Clean wooden furniture with a mild detergent and a soft brush, and treat it with a wood preservative or oil to protect it from the elements. Metal furniture can be cleaned with a wire brush and repainted if necessary, while plastic furniture can be washed with soapy water. If you have cushions or soft furnishings, check that they’re clean and in good condition, and replace them if needed.

General Tasks

June is a busy month in the garden, with plenty of tasks to keep you occupied. Here are some general gardening tasks to add to your June to-do list.

Composting and Soil Management

June is a great time to manage your compost heap. Add a mix of green (nitrogen-rich) and brown (carbon-rich) materials to create a balanced compost. Turn the compost regularly to aerate it and speed up the decomposition process. If your compost is ready to use, spread it over your garden beds to enrich the soil. You can also start collecting grass clippings and kitchen waste to add to your compost throughout the year.

Wildlife-Friendly Gardening

Encouraging wildlife into your garden is beneficial for both your plants and the local ecosystem. In June, consider adding a birdbath or bird feeder to attract birds, which can help control pests. Plant a variety of flowering plants to provide nectar for bees and butterflies, and leave some areas of your garden undisturbed to create habitats for insects and small mammals. Avoid using chemicals that could harm wildlife, and instead focus on natural gardening methods that promote a healthy, balanced environment.

Conclusion

June is a month of abundance and growth in the UK garden, with the promise of summer in full swing. With the right care and attention, your garden will thrive, providing you with a beautiful and productive space to enjoy throughout the year. From lawns and roses to vegetables and houseplants, there’s plenty to keep you busy in the garden this month. By following the tips and advice in this article, you’ll be well on your way to creating a stunning and thriving garden that you can be proud of.

Check out the RHS Gardening in June article here.

Back to The Gardeners Calendar