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Rocky Mountain Beardtongue

Penstemon strictus

Rocky Mountain Beardtongue is one of the most robust and adaptable beardtongue species for western gardens. Native to the southern Rocky Mountains and surrounding areas, this perennial thrives in full sun and well-drained soils, showing impressive drought tolerance once established.

Its deep green, semi-evergreen leaves form a tidy rosette at the base, giving rise in late spring to early summer to upright stems bearing vivid blue to blue-violet flowers. These tubular blooms are not only visually striking, they’re a valuable nectar source for bumble bees, long-tongued solitary bees, and hummingbirds, especially when few other flowers are in bloom.

With its upright growth habit, usually reaching 1.5 to 3 feet tall, this species works well in xeriscapes, meadows, rock gardens, and pollinator strips. It is known for its longevity and resistance to rot in comparison to some more delicate Penstemon species.

Details

Height12” - 36”
Spread18"
Bloom SeasonMay – June
Soil Types
loamLoam
sandSand
gravelGravel
Soil Moisture
dryDry
mediumMedium
Sun Exposure
partSunPart Sun
fullSunFull Sun

Range Map

Native
No current
record

Ecological Benefits

Maintenance Tips

  • Requires excellent drainage; avoid planting in heavy clay.
  • Tolerates drought well; water sparingly once established.
  • Deadhead after flowering to encourage a tidier look and potential light reblooming.
  • May benefit from division every few years if crowded.
  • Can self-seed moderately, but not aggressively.

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