About
Penstemon cardwellii is a compact, mat-forming, evergreen sub-shrub producing upright spikes of tubular, lavender-purple flowers over small, leathery leaves in late spring and summer. A rewarding and ornamental penstemon for a sunny, well-drained rock garden or raised bed.
About the genus
Penstemon are deciduous or evergreen perennials or subshrubs with simple, narrow leaves and racemes or panicles of tubular, bell-shaped or funnel-shaped flowers in summer and early autumn, in shades of red, pink, purple, white and bicolours. Excellent plants for sunny, well-drained borders.
Plant details
Suggested usesBorders, hedging, specimen planting.
Care notes
CultivationPlant in well-drained soil in sun or part shade.
PruningPrune after flowering or late winter.
PropagationPropagate by division, cuttings, or seed.
Pest resistanceGenerally pest-free.
Disease resistanceGenerally disease-resistant.