Philadelphus coronarius - The Classic Mock Orange
Common Mock Orange

Position
- Full sun for optimal flowering
- Can tolerate light shade
Hardiness
- Can withstand temperatures down to -15°C (5°F)
- Fully hardy throughout UK
Soil Type
- Prefers well-draining soil
- Thrives in fertile, loamy soils
Soil PH
- Prefers neutral to alkaline soil
Height
- Can grow to approximately 2-3 metres (6-10 feet) after 5-10 years
- Spread of 1-2 metres (3-6 feet)
Seasons of Interest
- Flowering period: Late spring to early summer (May to June)
- Foliage typically remains green throughout the growing season, no notable autumn colour
Additional Notes
- Produces fragrant, white blossoms that attract pollinators
- Forms a dense, bushy shrub ideal for hedging or as a feature plant
- Minimal maintenance required; can be pruned after flowering to maintain shape
- Ideal for cottage gardens and informal settings
- Water regularly during dry spells, especially when young
- Tolerates a range of soil types, including clay, as long as drainage is good
Growing Philadelphus coronarius: The Classic Mock Orange
Philadelphus coronarius, commonly known as mock orange, brings abundant fragrant white flowers to summer gardens. This comprehensive guide helps you grow this classic deciduous shrub successfully.
What is Philadelphus coronarius?
Mock orange is a hardy deciduous shrub that produces cup-shaped white flowers with a strong citrus scent. It typically grows to 2.5-3 metres in height.
The dense green foliage provides an excellent backdrop for the clusters of fragrant blooms.
Where Should I Plant Mock Orange?
Choose a spot in full sun or partial shade with well-drained soil. The shrub thrives in moist, fertile conditions.
Incorporate plenty of organic matter, such as manure or garden compost, before planting.
How Do I Care for My Mock Orange?
Water regularly during the first growing season to establish a strong root system. Apply mulch in spring to retain moisture.
Prune immediately after flowering to maintain shape and encourage next year’s blooms.
When Does Mock Orange Flower?
Expect abundant white flowers in early summer, usually May to June. The blooms appear in clusters along the branches.
Each flower produces a strong orange blossom scent that fills the garden.
What About Pruning?
Cut back old flowering stems to strong new growth after blooming. Remove about one-third of old stems at ground level annually.
This pruning regime keeps the shrub vigorous and flowering well.
How Big Will It Grow?
Mock orange typically reaches 2.5-3 metres in height and similar spread. Regular pruning can maintain smaller dimensions.
The arching habit makes it ideal for the back of borders.
Will It Grow In My Garden?
This hardy shrub adapts to most UK gardens. It tolerates various soil types but prefers well-drained conditions.
Plant near paths or seating areas to enjoy the fragrance.
What Are The Best Cultivars?
Several varieties offer different sizes and flowering times. The common mock orange remains a reliable choice.
The RHS has given the following cultivars their Award of Garden Merit:
- Philadelphus coronarius ‘Aureus’
- Philadelphus coronarius ‘Variegatus’
- Philadelphus delavayi f. melanocalyx ‘Nyman’s Variety’
- Philadelphus maculatus ‘Sweet Clare’
- Philadelphus ‘Beauclerk’
- Philadelphus ‘Belle Étoile’
- Philadelphus ‘Innocence’
- Philadelphus ‘Manteau d’Hermine’
- Philadelphus ‘Silberregen’
- Philadelphus ‘Sybille’
- Philadelphus WHITE ROCK (‘Pekphil’)
How Do I Use It In The Garden?
Mock orange works perfectly as a specimen shrub or in mixed borders. Its height makes it an excellent screening plant.
The fragrant flowers attract pollinators, adding wildlife value to your garden.
Key Points to Remember:
- Hardy deciduous shrub
- Fragrant white flowers in early summer
- Grows 2.5-3 metres tall
- Needs well-drained soil
- Tolerates sun or partial shade
- Prune after flowering
- Strong orange blossom scent
- Excellent for borders
- Low maintenance
- Perfect for wildlife gardens
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Check out the RHS article here.
For more information on Shrubs for your garden please click here.
Frequently Asked Questions
Q: What’s the best way to buy a Philadelphus coronarius plant?
A: You can buy a Philadelphus coronarius from local nurseries or online plant stores such as Swift Plants. Just make sure to check for healthy plants with vibrant leaves and accurate descriptions before you make your purchase!
Q: What makes Philadelphus coronarius so useful in gardens?
A: This plant is useful because it adds beautiful fragrant blooms in spring and is perfect for borders. Plus, it’s relatively easy to care for once established!
Q: May I see the bloom of Philadelphus coronarius throughout the year?
A: Unfortunately, you won’t see blooms all year round. The fragrant flowers typically bloom in late spring to early summer, so enjoy them while they last!
Q: Can you give me a description of the Common Mock Orange plant?
A: Certainly! Philadelphus coronarius, or Common Mock Orange, features lovely white, bowl-shaped flowers and lush green leaves. It’s a deciduous shrub that can grow up to 3 metres tall, making it a stunning addition to any garden!
Q: What’s your expert advice on caring for Philadelphus coronarius?
A: My best advice is to plant it in well-drained soil and in a sunny spot. Regular pruning after the blooming season will help keep it in shape and encourage healthy growth!
Q: Are there any varieties of Philadelphus coronarius that I should consider?
A: Yes, there are several varieties! Some popular ones include ‘Aurea’ with golden leaves and ‘Variegatus’ with beautifully variegated foliage. Each variety offers something unique for your garden!
Q: How many leaves does Philadelphus coronarius typically have?
A: The number of leaves can vary, but you can expect a great number of lush green leaves on a healthy shrub, contributing to its overall dense appearance!
Q: Where can I find more information about Philadelphus coronarius?
A: You can find useful information on gardening websites, the Royal Horticultural Society, or even by emailing local horticultural experts. They can provide a wealth of resources and advice!
Q: Is Philadelphus coronarius easy to grow for beginners?
A: Absolutely! The Common Mock Orange is quite easy to grow, especially if you follow some basic care tips. It’s a perfect choice for beginner gardeners seeking a lovely and fragrant shrub!