Beardtongue Seeds 6860 (Penstemon digitalis). Beardtongue is an Ontario native flower that is extremely attractive to bees and hummingbirds. It is best used in open woodland or prairie plantings where it tolerates dry soils in full sun or partial shade in a rich, acidic soil. Beardtongue is a clump forming plant that can grow to a height of 120 cm (4′). Low clumps of dark green foliage and its bright pure white tubular flowers about 3 cm (1.25″) long make this a perfect specimen for the back of the border when used in a formal garden. Perennial hardy to Zone 4 – some reports show it hardy to Zone 3.
How to Grow
1,350 seed/gram. Sow seed indoors in early February 3 mm (1/8″) deep using a soil-less mix. Moisten the growing medium then stratify seed by placing it in a freezer or outside during freezing weather for four weeks. After that time, bring the container to the warmth and germinate at 14 C (55 F) for 20-25 days then grow on under lights at the same temperature. Harden off seedlings then transplant to the garden in a sunny or semi-shaded spot after the danger of frost has passed. Seed can also be directly sown outside in the fall. Beardtongue does best on moist organic soil.