About
An upright, clump-forming, semi-evergreen perennial to 60cm, with lance-shaped, mid-green leaves. Airy spikes of tubular, red-purple flowers with white throats are produced in summer.
About the genus
Penstemon may be deciduous or evergreen perennials or subshrubs, with simple, narrow leaves and racemes or panicles of bell-shaped or funnel-shaped flowers in summer and early autumn
Growing conditions
SunlightFull sun, Partial shade
Soil typeLoam, Chalk, Sand
Soil pHAcid, Alkaline, Neutral
Soil moistureWell-drained
AspectSouth-facing, West-facing, East-facing
ExposureExposed, Sheltered
UK hardinessH5
Plant details
Plant typeHerbaceous Perennial
HabitClump forming
FoliageSemi evergreen
Height0.5-1 metres
Spread0.1-0.5 metres
Time to full height2-5 years
Suggested usesCity and courtyard gardens, Cottage and informal garden, Patio and container plants, Wildlife gardens
Care notes
CultivationGrow in fertile, well-drained soil in full sun or partial shade. In cold areas, protect plant over winter with a dry mulch. See penstemon cultivation
PruningRemove spent flower spikes to help encourage a long season; cut all stems down to low-growing shoots in mid- to late MarchRegular deadheading can encourage a longer flowering season. In autumn, cut back to by about a third to tidy and reduce windrock, but leave enough to protect the crown over winter. In mid- to late spring cut back to lowest new shoots
PropagationPropagate by softwood cuttings in early summer or semi-ripe cuttings in midsummer
Pest resistanceMay be susceptible to aphids and chrysanthemum eelworm
Disease resistanceMay be susceptible to powdery mildews