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CERATOSTIGMA willmottianum
Commonly known as Shrubby plumbago
Clear blue
Further Reading....
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DeciduousLance-shaped to obovate, bristly, mid- to dark-green, purple-margined leaves to 5cm (2in) long. Red in autumn.
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BluePale to mid-blue with purple-red tubes
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Height1m (39in)
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Spread1.5m (5ft)
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Medium shrubTypically grow to around 4-6 feet in heightOpen-branched, spreading shrub with slender stems
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Hardy - average winterHardy through most of the UK apart from inland valleys, at altitude and central/northerly locations. May suffer foliage damage and stem dieback in harsh winters in cold gardens. Plant can withstand temperatures down to -10°C (14°F)
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Full sun
CERATOSTIGMA willmottianum
- Details
- Mature Size
- Tips and Advice
- Goes Well With
- Planting Combinations
- Other Suggestions
- See Also...
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Additional FeaturesPests & DiseasesPowdery mildew.Place of originWestern China.Resistant to honey fungusThese plants have little or few problems with honey fungus.
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Flower ShapeSpikesFlowers to 2.5cm (1in) across in axillary and terminal spike-like clustersTubular
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HardinessFrost hardy (down to -5)
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Leaf marginSerrulate
(see photos above) -
Leaf shapeLanceolate
(see photos above) Obovate(see photos above) -
Pruning groupPruning group 7Suitable for: Evergreen shrubs that flower on previous year's growth in Spring, or current year's growth in late Summer/Autumn.
Action: Cut back flowered shoots to within 1 inch of previous year's growth.
When: Annually after flowering or in Spring if flowering on current year's growth.
RHS group 10 -
Seasonal InterestAutumn
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Soil ConditionsMedium to light, fertile, well drained soil
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Ceratostigma - Growing Guide
1m (39in)
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1.5m (5ft) |
Buy Varieties of CERATOSTIGMA willmottianum


CERATOSTIGMA willmottianum 'Forest Blue'
Shrubby plumbagto
bright blue flowers in late summer and good autumn colour

CERATOSTIGMA willmottianum 'Sapphire Ring'
Shrubby plumbago
yellow-gold foliage and blue flowers. Compact tidy habit
Useful extras...

Fertilisers & Feeds - Vitax
Q4 Pelleted Fertiliser
A useful fertiliser suitable for use on a wide variety of plants. Q4 provides all the nutrients and trace elements essential for vigorous growth, abundant flowering and ripening of fruit.
3 options from £6.00

Fertilisers & Feeds - Empathy
Rootgrow mycorrhizal fungi
Recommended by the RHS. Contains Rootgrow™ mycorrhizal fungi. Suitable for all trees and shrubs (except rhododendrons, azaleas, heathers, cranberries and blueberries)
2 options from £6.00

Fertilisers & Feeds - Empathy
All-purpose Seaweed Stimulant
All-purpose organic concentrated seaweed feed that is a ready to use, derived from sustainable harvested kelp, that can be used on all outdoor and indoor plants, except acid loving plants.
Perfect used in conjunction with Rootgrow™.
Only £7.50