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botanical name:
Penstemon 'Blackbird'
Penstemon 'Blackbird' © Deeproot Plant Base
family:  Plantaginaceae
characteristics: perennial, evergreen
height: 1.00m
width: 0.50m
growth rate: medium
growth habit: clump
leaf colour: green
flower colour: purple
stem/bark: maroon
main season: Summer
aspect: full sun, part shade
conditions: moist soil
preferred soil pH: any
minimum temp: -12°C
USDA zone: 8 to 9
Dark red-purple tubular flowers opening from very dark buds, from summer to autumn. Large, lance-shaped, green leaves and dark red stems

Moderately fertile, well drained soil in full sun or partial shade. Apply a mulch before winter. Very wet conditions in winter may cause crown rot.
Dead-head after flowering. Cut back in late winter to tidy plants.

From cuttings. Non-flowering tip cuttings taken in late summer or early autumn are best, keep frost free over winter.

other notes:
Selected by Ron Sidwell, Evesham, Worcestershire, UK, about 1960.
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