
Plants Of The Southwest
Penstemon grandiflorus
Large Flowered Penstemon
Huge, lavender-blue flowers bloom on 4 ft. stalks over smooth, grey-green, fleshy basal leaves. Large Flowered Penstemon is a summer blooming perennial. Sow in fall or cold stratify. Zones 3-8.
Legend of Symbols
Full Sun![]() |
Part Shade![]() |
Fragrant![]() |
Very Low Water ![]() |
Low Water ![]() |
Medium Water ![]() |