100 heirloom Foxglove Penstemon ( Beard Tongue) Wildflower Seeds Foxglove Penstemon, Perennial Height 24'' to 60'' Full Sun, Soil Moisture: Medium Zone: 2-10 Sow seeds on soil surface at 45 F and water Birds and butterflies are drawn to this carefree perennial, which also makes a lovely cut flower. The white flowers can be tinted with pink or purple, and the foliage is accented with a maroon-red color. Bloom Season: Summer Environment: Partial Sun/Full Shade