Summary
Long-sepal beardtongue (Penstemon calycosus) is a herbaceous perennial deserving of greater use in the garden because of its cultural adaptability. Long-sepal beardtongue tolerates a variety of conditions from filtered shade to full sun and well-drained, moist to dry soils. Flowers are produced in terminal panicles and each individual flower is 1” long, snapdragon-like, and ranges in color from light violet to purple. Plants can grow 1-3’ tall and roughly 2’ wide. The foliage is lance shaped, semi–glossy, medium green, and has finely saw-toothed edges. Use with Indian pink (Spigelia marilandica) to extend the season of bloom or use with Dale’s Strain American alumroot (Heuchera americana ‘Dale’s Strain’) and fringed bluestar (Amsonia ciliata) for a pleasing foliar combination. Zones 5-8.
More Details
- Sun/Shade Conditions
filtered-shade, full-sun - Foliage Character
semi-evergreen - Soil Moisture
dry-to-moist - Flowering Period
late-spring-to-early-summer - Soil PH
adaptable - Flower Color
purple - Summer Foliage Color
green - Fall Foliage Color
green, purple - Fruit/Seed Color
tan