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A picture of a Rocky Mountain Penstemon

Rocky Mountain Penstemon

Penstemon strictus

Also known as

Stiff beardtongue

Penstemon strictus plant1 by JerryFriedman (CC-BY-SA-3.0)

Full Sun
Easy care
Light watering
Half-hardy

4a-9b

USDA zone

-34°C

Minimum temperature

Expected size

Height
Spread

1m

Max

1m

50cm

Min

50cm

5 years to reach maturity

Flowering

  • spring
  • summer
  • autumn
  • winter

This plant has no fragrance

More images of Rocky Mountain Penstemon

A photo of Rocky Mountain Penstemon
A photo of Rocky Mountain Penstemon

Rocky Mountain Penstemon Overview

Penstemon strictus is one of the largest and longest-lived Penstemon species. Originally from the Rocky Mountains, it is adapted for dry conditions and poor soils. In mild Winters, Penstemon strictus will retain its deep green foliage and provide interest all year round. Penstemon strictus blooms profusely with beautiful violet/blue flowers that wildlife love.

Common problems with Rocky Mountain Penstemon

Susceptible to leaf and bud eelworms and downy mildew

How to harvest Rocky Mountain Penstemon

Not generally harvested

How to propagate Rocky Mountain Penstemon

Seed

Sow in seed trays early Spring

Division

Divide early spring when new growth starts

Cuttings

Semi-hardwood and Softwood cuttings are often successful.

Special features of Rocky Mountain Penstemon

Attractive flowers

Attracts birds

Attracts bees

Drought resistant

Other uses of Rocky Mountain Penstemon

Rock garden, wildflower/meadow