Large beardtongue is a striking native perennial that brings the wild beauty of Great Plains prairies into any garden. This herbaceous plant grows 2 to 4 feet tall with silvery foliage and produces showy, tubular blue-lavender flowers up to 2 inches long in late spring, blooming from May through June. Hardy from zones 3 to 9, it thrives in full sun and moderate water, requiring minimal maintenance once established. Its upright growth habit and large, open flower clusters make it a standout choice for gardeners seeking authentic prairie character with a touch of elegance.
Full Sun
Moderate
3-9
48in H x 18in W
—
Moderate
Hover over chart points for details
Large beardtongue commands attention with its oversized, blue-lavender tubular flowers arranged in open, upright racemes that practically glow in late spring sun. The silvery, thick foliage provides textural interest even before blooms appear, and the plants' native heritage means they're naturally adapted to lean, well-drained soils where many ornamentals struggle. Deer won't touch it, so it shines in gardens where wildlife pressure is a concern.
Large beardtongue is primarily used to naturalize gardens and prairie plantings, where its native heritage and self-seeding tendency allow it to establish naturalistic drifts that feel authentically rooted in place. Gardeners cultivate it for its striking late-spring blooms and silvery foliage texture, qualities that add visual depth and native character to perennial borders and meadow-style landscapes.
No timeline data available yet for this variety.
Seeds can be sown directly in well-prepared, gritty soil in full sun.
After flowering ends in June, cut plants back to basal foliage to improve the overall appearance of the planting and remove spent flower stems. This practice helps maintain a tidier, more compact form.
Enter your ZIP code to see a personalized growing calendar for this plant.
“Penstemon grandiflorus hails from the native grasslands of the Great Plains and Midwest United States, where it has thrived in sand prairies, tallgrass prairies, and loess hills for centuries. This species grows wild in open, grassy habitats across its native range, where it evolved to withstand the harsh, dry conditions and poor soils characteristic of prairie ecosystems. Its arrival into cultivation came through the rediscovery and appreciation of native plants by gardeners and botanists seeking to restore and celebrate the ecological character of American grasslands.”