Penstemon grandiflorus (Large-flowered penstemon or showy beardtongue) is a striking perennial flowering plant native to the central United States. Here are some key characteristics and descriptions of Penstemon grandiflorus:
Botanical Characteristics:
Family: Plantaginaceae
Growth Habit: Herbaceous perennial
Height: Typically grows 2-3 feet (60-90 cm) tall
Leaves: Large, thick, and waxy leaves that are bluish-green in color. The leaves are arranged oppositely along the stem and are lance-shaped to elliptical.
Flowers: Large, tubular flowers that are usually pale lavender, pink, or purple. The flowers are arranged in loose, open clusters at the top of the stems. Each flower is bilaterally symmetrical with a prominent "bearded" staminode.
Bloom Time: Late spring to early summer (usually May to June)
Fruit: Produces small, dry capsules containing numerous seeds.
Habitat and Range:
Native Range: Central United States, including parts of Nebraska, Kansas, South Dakota, and Minnesota.
Preferred Habitat: Thrives in well-drained soils, often found in prairies, open woodlands, and along roadsides. It prefers full sun and is drought-tolerant once established.
Cultivation:
Soil Requirements: Prefers well-drained soils, particularly sandy or rocky types.
Watering: Drought-tolerant; avoid overwatering.
Sun Exposure: Full sun
Propagation: Can be propagated from seeds or by division. Seeds may require a cold stratification period to germinate.
Maintenance: Low maintenance; deadheading spent flowers can encourage additional blooming.
Uses and Benefits:
Ornamental Use: Valued for its large, showy flowers and ability to thrive in challenging conditions, making it a popular choice for xeriscaping, prairie gardens, and rock gardens.
Wildlife: Attractive to pollinators, including bees, butterflies, and hummingbirds.