About
Incarvillea delavayi, the Delavay hardy gloxinia, is a herbaceous perennial producing a basal rosette of pinnate leaves to 30 cm long. From early to midsummer, clusters of ornamental, trumpet-shaped, deep-pink flowers with a yellow throat appear on erect stems. One of the most reliable and free-flowering of the hardy incarvilleas for a sunny, well-drained border.
About the genus
Incarvillea are annuals and perennials with pinnate or pinnatisect leaves and showy, trumpet-shaped, often richly coloured flowers. Grown in sunny, well-drained borders and rock gardens.
Growing conditions
SunlightFull sun
Soil typeChalk, Loam, Sand
Soil pHAcid, Alkaline, Neutral
Soil moistureMoist but well-drained
AspectEast-facing, West-facing
ExposureSheltered
UK hardinessH5
Plant details
Plant typeHerbaceous Perennial
HabitBushy
FoliageDeciduous
Height0.5-1 metres
Spread0.1-0.5 metres
Time to full height2-5 years
Suggested usesCottage and informal garden, Patio and container plants, City and courtyard gardens
Native toSW China
Care notes
CultivationGrow in fertile, moist but well-drained soil in full sun, but ideally with some summer shade. Will not tolerate winter wet. Mulch over crown in cold areas
PruningCut back at the end of the season
PropagationPropagate by seed, or take basal stem cuttings in spring
Pest resistanceMay be susceptible to slugs and snails
Disease resistanceGenerally disease-free