Rocky Mountain Penstemon Seeds 6965

Rocky Mountain Penstemon Seeds – 6965

Penstemon strictus | Perennial | Pollinator-Friendly

Rocky Mountain Penstemon is a hardy, drought-tolerant perennial native to the western United States, known for its brilliant purple-blue, trumpet-shaped flowers that bloom on stalks up to 60 cm (24") tall. This plant forms a low rosette of deep green foliage, producing a stunning floral display in early summer that attracts butterflies, hummingbirds, and beneficial pollinators.

Ideal for dry, well-drained soils, especially in open woodlands or xeriscapes, this Zone 4-hardy perennial is excellent for naturalizing and is often used in cut flower gardens for its bold color and vertical form. Rocky Mountain Penstemon self-sows easily, making it a reliable addition to native plantings and low-maintenance landscapes.

Key Features

• Produces intense purple-blue flowers, 2.5 cm (1") wide
• Grows up to 60 cm (24") tall
• Thrives in dry, sandy, well-drained soil
• Self-sows readily in suitable conditions
• Attracts butterflies and hummingbirds
• Excellent for naturalizing and cut flower use
• Hardy perennial for Zones 4 and up

How to Grow Rocky Mountain Penstemon

Seed Details:

• Approx. 1050 seeds/gram

Indoor Starting:

• When: Begin indoors in early March
• Medium: Use a sterile, soil-less seed mix
• Sowing Depth: Lightly press seeds into surface (do not bury)
• Germination Temp: Keep at 15°C (59°F)
• Germination Time: 20–30 days
• Grow on under lights at the same temperature until transplanting

Transplanting Outdoors:

• Harden off and transplant after last frost
• Choose a sunny location with sandy, open soil
• Avoid poorly drained or soggy soil—excess moisture in winter may cause plant loss

Direct Sowing (Fall Option):

• Sow directly in late October to allow natural winter stratification
• Ideal for native and low-water-use gardens