
Plants of the Southwest
Penstemon strictus
Rocky Mountain Penstemon
Rocky Mountain Penstemon is a 2+ ft. perennial with multiple spires of large, dark to brilliant blue-purple flowers. Blooms early summer. Very hardy. One of the easiest penstemons to grow! Sow in fall or cold stratify. Zones 3-8.
Legend of Symbols
Full Sun![]() |
Part Shade![]() |
Fragrant![]() |
Very Low Water ![]() |
Low Water ![]() |
Medium Water ![]() |