 | Smooth Penstemon (Penstemon digitalis). Hardy, North American perennialDescription: White, tubular, 5-lobed flowers with thin purple lines to guide pollinators cluster on spires in mid-late spring; leaves are elliptical at base, becoming lance-shaped further up stem. Habit: Grows 3-5 feet high and up to 2 feet wide; flowers on erect, rigid stems; clump-forming.Culture: Prefers full sun to light shade and moist to dry, well-drained soil; drought tolerant.Hardiness: Cold hardy to USDA Zone 3Origin: Eastern... - Smooth Penstemon (Penstemon digitalis). |
