Penstemon barbatus, 'Twizzle White'

Germination

Sow in a cold frame autumn or under glass Feb-Mar. Surface sow onto moist, well-drained seed compost. Just cover seed with fine gravel or similar. Ensure soil surface is moist. Over wintered seed should germinate in spring as the weather warms. For indoor spring sowings, ideal germination temp. 20°C. Transplant seedlings when large enough to handle to individual pots and grow on for 30 days, then move outside or plant out directly in the garden.

Growing

Prefers full sun and a fertile, well-drained soil.

Cultivation

Deadhead spent flowers, unless seed is required. Cut plant back to base in winter. Propagate via softwood cuttings in early summer or semi-ripe stem tip cuttings in summer-autumn. Divide established clumps in spring.