Description
Rocky Mountain Penstemon Seeds 6965.
Intense Purple-Blue Blooms for Hummingbirds and Cut Flower Displays.
Rocky Mountain Penstemon (Penstemon strictus) forms a attractive rosette of deep green leaves topped with multiple flower stalks reaching up to 60 cm in height. In early summer, these stems are loaded with vibrant, 2.5 cm wide purple-blue flowers that create a stunning visual splash. Highly effective at attracting hummingbirds and butterflies, this hardy perennial self-sows readily and makes an excellent long-lasting cut flower. It thrives in sunny, well-drained locations with dry or sandy soils, performing best when kept away from soggy winter sites.
Quick Seed Details
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Product Code: 6965
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Botanical Name: Penstemon strictus
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Type: Hardy Perennial
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Hardiness: Zone 4
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Height: 60 cm
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Light Requirement: Full Sun
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Soil Preference: Dry, sandy, well-drained soils (intolerant of wet winter conditions)
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Germination: 20–30 days
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Seed Count: Approx. 1,050 seeds per gram
What you need to know to Plant & Grow
Rocky Mountain Penstemon seeds carry natural dormancy and respond exceptionally well to cold winter stratification.
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Outdoor Direct Sowing (Recommended): Direct sow seed in late October in a sunny location with sandy, light soil. Natural winter conditions will stratify the dormant seeds for uniform spring emergence.
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Indoor Sowing:
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Start seeds indoors at the beginning of March using a quality soilless growing medium.
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Maintain a cool temperature of 15°C throughout the 20 to 30 day germination period.
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Grow on under lights at 15°C before hardening off.
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Transplant seedlings outdoors to a sunny, open location with well-drained soil once frost risk has passed.
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Why Rocky Mountain Penstemon Seeds belong in Your Garden
If you want deep, dramatic jewel tones in early summer, Rocky Mountain Penstemon is an ideal selection. Its drought tolerance, easy-care nature, and ability to attract hummingbirds make it a stellar addition to sunny borders, gravel gardens, or dry hillside naturalizations.
