10 - 20 cm
lilac - mauve
June - July
well drained, gritty
acid - neutral - alkaline
grows well, given the right conditions
Penstemon is a genus in the family Plantaginaceae. It is a large genus native to N-America. They are usually low growing herbaceous plants or sub-shrubs with irregularly shaped flowers. They prefer full sun and many are well suited to rock gardens.
Seed - sown in January - March.
Seed not covered and stored at 20°C (68°F) until germination.
Low growing rock garden plant. Needs very well drained soil, preferably on a slope.