Coronilla glauca Citrina
Glaucous Scorpion-Vetch

Position
- Full sun to partial shade
- Sheltered position protected from cold winds
- South or west-facing aspects are ideal.
Hardiness
- Hardy to -10°C (14°F)
- May need winter protection in colder areas of the UK
Soil Type
- Well-drained, fertile soil
- Tolerates most soil types but performs best in moisture-retentive, humus-rich soil.
Soil PH
- Slightly acidic to neutral (pH 5.5-7.0)
- Will tolerate mildly alkaline conditions.
Height
- Usually reaches 0.90-1.3 metres (3-4 feet) tall and wide.
Seasons of Interest
- Flowering period from June through to October
- Semi-evergreen foliage provides year-round interest
- Purple-bronze tints to foliage in autumn
- Attractive pink-tinged sepals persist after flowers fade
Additional Notes
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- Pruning: Light pruning in early spring to maintain shape. Remove any frost-damaged growth.
- Watering: Regular watering needed during establishment and dry spells. Avoid waterlogging.
- Fertilising: Apply balanced fertiliser in spring. Mulch annually with organic matter.
- Growth Rate: Medium growth rate, taking 5-10 years to reach full size.
- Companion Plants: Works well with other acid-loving plants like Hydrangeas and Japanese Maples.
- Uses: Excellent for mixed borders, informal hedging, and container growing.
- Winter Care: Consider applying mulch around base in autumn for root protection.
- Fragrance: Flowers are lightly fragrant, particularly noticeable in evening.
- Maintenance Level: Medium – requires regular attention but not demanding.
- Wildlife: Attractive to bees and butterflies
Coronilla glauca Citrina: A Cheerful Evergreen Shrub for Winter Gardens
Coronilla glauca Citrina, also known as Coronilla valentina subsp. glauca Citrina, is a delightful evergreen shrub that offers bright yellow flowers and a sweetly scented bloom in late winter and early spring, providing much needed colour. Its compact growth and vibrant foliage make it a must-have for any UK garden, especially during the colder months when cheerful colours are most needed. This article explores the plant’s key features, care tips, and why it deserves a place in your garden.
What Is Coronilla Citrina?
Coronilla Citrina is a compact evergreen shrub with bright yellow flowers that bloom in late winter. A member of the pea family, this plant features clusters of pea-like blooms followed by slender pods. Its blue-grey, pinnate leaves create an attractive backdrop, adding colour to even the dullest winter days.
This spectacular shrub grows to a height of approximately 180cm with a similar spread, making it ideal for smaller gardens or borders. Its bushy nature and year-round foliage make it a reliable garden addition.

Why Should I Choose Coronilla glauca for My Garden?
Coronilla glauca provides much-needed colour during winter, brightening your garden when most plants lie dormant. Its fragrant, lemon-yellow blooms bring cheer to cold days, offering a sweet scent that enhances the garden experience.
Additionally, its versatility makes it suitable for various planting styles, whether as a standalone feature, part of a border, or paired with herbaceous perennials, and it can thrive in south or west facing gardens. The plant’s ability to thrive in sheltered spots and tolerate coastal conditions adds to its appeal.
When Does Coronilla Citrina Bloom?
Coronilla Citrina flowers from late winter well into spring, creating a much-needed splash of colour during the colder months. Its pale lemon flowers bloom in abundance, providing a vibrant display that transforms even the dullest garden.
The blooms are particularly valuable during winter days, offering a cheerful sight against a blue-grey backdrop. This flowering period aligns perfectly with the need for late-season vibrancy.
Where Should I Plant Coronilla glauca Citrina?
To get the best results, plant Coronilla glauca in a south or west-facing sheltered spot. It thrives in full sun, tolerating moderate frost if well-cared for, which is much needed in colder regions. A south-facing wall can provide additional shelter and warmth, protecting the shrub from extreme weather.
The plant prefers well-drained soil, making it ideal for garden beds or pots. Whether in the centre of a sunny border or as a potted feature on a patio, Coronilla glauca adds year-round interest to your space.
How Do I Care for Coronilla Citrina?
Caring for Coronilla Citrina is straightforward. Ensure it receives plenty of sunlight, regular watering, and a well-drained soil environment. During dry spells, water consistently to prevent the soil from drying out completely.
Prune the shrub after flowering to maintain its bushy growth and encourage new blooms. Use a balanced fertiliser annually to support healthy foliage and flower production.
Can Coronilla Citrina Tolerate Coastal Conditions?
Yes, Coronilla Citrina is a hardy plant that tolerates coastal gardens. Its ability to withstand salt-laden winds makes it an excellent choice for gardens near the sea.
The evergreen shrub thrives in a variety of environments, bringing colour and cheer to coastal and inland gardens alike.
How Big Does Coronilla Citrina Grow?
Coronilla Citrina typically reaches a height and spread of approximately 90–180cm. Its compact size makes it suitable for small gardens or confined spaces.
Despite its bushy appearance, this plant remains easy to manage, fitting seamlessly into various garden styles and layouts.
What Makes This Shrub Suitable for UK Gardens?
Coronilla citrina is quite fully hardy, tolerating UK winters with proper care, making it a much needed addition for gardeners. Its ability to bloom during late winter and early spring makes it a valuable addition to British gardens.
The RHS recommends this plant for its reliable performance, evergreen foliage, and pale, lemon-yellow flowers. Its sweetly scented blooms provide a sensory delight that’s hard to match.
Is Coronilla Glauca Citrina Available for Mail Order?
Yes, this shrub is available through many nurseries and online stores including Swift Plants. A 3 litre pot ensures a well-established plant, ready to thrive in your garden.
Tips for Pruning and Encouraging Growth
To keep Coronilla healthy and vibrant, prune it annually after flowering. This prevents the shrub from becoming too woody and encourages new blooms.
Use sharp, clean tools to remove any dead or damaged branches. Regular pruning ensures a bushy growth habit and maintains its compact size.
Key Points to Remember
- Bright Winter Blooms: Coronilla Citrina produces fragrant yellow flowers from late winter into spring.
- Evergreen Foliage: Its blue-grey leaves provide year-round interest, enhancing garden aesthetics.
- Care Needs: Thrives in full sun, well-drained soil, and sheltered spots. Prune annually for best results.
- Compact Growth: Reaches a height and spread of 90–180cm, suitable for small gardens or coastal areas.
- Ideal for UK Gardens: Hardy and low-maintenance, perfect for brightening dull winter days.
Coronilla glauca citrina is a spectacular shrub that brings much needed colour to any garden. Its evergreen foliage, sweetly scented flowers, and vibrant winter blooms make it a standout choice for gardeners seeking year-round interest.
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Frequently Asked Questions
Q: What is Coronilla valentina subsp. glauca citrina?
A: Coronilla valentina subsp. glauca citrina, also known as bastard senna, is a delightful shrub that brings much-needed colour to your garden. It produces bright yellow flowers that bloom in late winter, making it an excellent choice for adding vibrancy during the colder months.
Q: How tall does Coronilla glauca grow?
A: This plant can reach a height of around 90cm to 180cm, depending on how it is cared for. If you’re looking to add vertical interest to your garden, this could be the perfect choice!
Q: Can I buy Coronilla valentina subsp. online?
A: Absolutely! Coronilla glauca plants are readily available in Swiftplants.com online catalogue. Simply place your order, and you’ll soon have this beautiful plant in your garden.
Q: What’s the best location for planting Coronilla valentina subsp.?
A: Ideally, plant your bastard senna in a south or west-facing location. This will ensure it receives plenty of sunshine, which is essential for those stunning flowers.
Q: How often should I water my Coronilla glauca?
A: Once established, these plants are relatively low-maintenance. Water them regularly during dry periods but avoid overwatering, as they dislike sitting in soggy soil.
Q: When can I expect flowers from my Coronilla glauca?
A: You can expect flowers in late winter, which is perfect for brightening up dreary days. It’s a great way to add much-needed colour to your garden early in the year!
Q: Are Coronilla valentina subsp. suitable for year-round gardening?
A: Definitely! With the right care, these plants provide year-round interest for your garden. Give them the attention they need throughout the seasons, and they’ll thrive beautifully.