Penstemon barbatus Twizzle Purple

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.