Penstemon pruinosus
Penstemon pruinosus
Frosted Penstemon
◆
Taxonomy
Family Plantaginaceae · Genus Penstemon
Common Names
Frosted PenstemonSagebrush Penstemon
Context
nativeRegion
Western North America, particularly the Rocky Mountain region.
usdaZones
4-8
companionPlants
Eriogonum, Artemisia, Sedum
culturalUses
Valued for native plant gardens, xeriscaping, and pollinator support.
Care
Care Requirements
LightPrefers full sun to partial shade.
WateringLow; drought-tolerant once established.
SoilWell-drained, sandy or rocky soils with low fertility.
FertilizerRarely needs fertilizing; avoid rich or heavy soils.
HumidityTolerates dry air, does not require high humidity.
TemperatureHardy to frost; best grown in temperate climates.
Growth & Life Cycle
HabitPerennial herb with upright, branching stems.
Mature SizeTypically 30-60 cm (1-2 ft) tall.
Growth RateModerate growth rate.
BloomingBlooms in late spring to early summer with purple-blue tubular flowers.
DormancyDies back to the ground in winter dormancy.
Propagation
MethodsSeed, Softwood cuttings
DifficultyModerate
Best SeasonSpring or early summer for cuttings; late fall or early spring for seeds.
Maintenance & Notes
PruningRemove spent flowering stalks to encourage further blooming.
RepottingNot applicable; best grown in open ground or large pots to avoid disturbance.
Pests & DiseasesGenerally pest-free; may be susceptible to fungal root rot in poorly drained soil.
ToxicityNot known to be toxic to humans or animals.
Recent Public Plants
No public plants yet.