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Catalogue > Wildflower Species & Blends > Wildflower Varieties > Rocky Mountain Penstemon (Penstemon strictus) 6965

Rocky Mountain Penstemon (Penstemon strictus) 6965

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Rocky Mountain Penstemon produces a rosette of deep green leaves and multiple flower stalks up to 60 cm (24") high bearing intense blue 2.5 cm (1") wide flowers. Plants bloom in early summer and self-sows very easily. This introduced perennial prefers dry soil locations in open spruce or pine forests. It can naturalize in these areas however soil that remains wet for extended periods can lead to plant mortality during the winter. A good plant for attracting butterflies and hummingbirds. It is often grown for use as a cut flower. Perennial hardy to Zone 4.

  • Packet $1.99
  • 25g $7.70
  • 125g $34.65
  • 250g $59.35
  • 500g $99.75

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6965
Sow seed indoors in a soil-less medium at the beginning of March. Keep at 15 C (60 F) for the 20 to 30 day germination period. After that, grow on under lights at the same temperature before hardening off and transplanting outside to a sunny site with sandy open soil after the danger of frost has passed. Seed can also be direct sown in its preferred location in late October. This allows any dormant seed to be naturally stratified during the winter.
Early Summer
Perennial
Start Indoors or Sow Direct in Fall
20 to 30
Full Sun
Bushy
Medium (45 to 60 cm)(18 to 24")
Winter Hardy
Easy
Introduced Species
Plantaginaceae
Penstemon strictus
Massing in open dry soils.
Specimen in formal gardens.
Associated with open pine and spruce plantings.
Superb cut flower plant.
Butterfly and hummingbird gardens.
Many native plants produce seed that is viable but dormant. This means that while the seed has all the internal structures and nutrients required to germinate, the seed coat is so hard, water cannot pass through it and initiate germination. When seed is in this state, it is known as being dormant. Seed dormancy is a naturally selected for trait that protects the seed of many plants allowing them to safely overwinter and then be ready to sprout in more favourable conditions in spring.
The remedy to naturally breaking seed dormancy is typically the passing of time. In particular, seed overwintering outside and experiencing the natural freeze thaw cycles that occur in late fall, winter and early spring. To artificially break seed dormancy, sow the seed in a soil-less mix, water than chill in a refrigerator for a set period of time. This dormancy breaking process is called stratification.
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