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Commonly known as Shrubby plumbago
DeciduousLance-shaped to obovate, bristly, mid- to dark-green, purple-margined leaves to 5cm (2in) long. Red in autumn.
BluePale to mid-blue with purple-red tubes
Medium shrubTypically grow to around 4-6 feet in heightOpen-branched, spreading shrub with slender stems
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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Additional FeaturesPests & DiseasesPowdery mildew.Place of originWestern China.Resistant to honey fungusThese plants have little or few problems with honey fungus.
Flower ShapeSpikesFlowers to 2.5cm (1in) across in axillary and terminal spike-like clustersTubular
HardinessFrost hardy (down to -5)
(see photos above)
(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
Soil ConditionsMedium to light, fertile, well drained soil
Buy Varieties of CERATOSTIGMA willmottianum
bright blue flowers in late summer and good autumn colour
yellow-gold foliage and blue flowers. Compact tidy habit