Bunchleaf Penstemon

Penstemon heterophyllus

Native to:
United States

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Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Plantaginaceae
Genus:
Penstemon
Species:
Penstemon heterophyllus
USDA Symbol:
PEHE3

Growth Characteristics

Life Cycle:
Perennial
Growth Habit:
Forb/herb , Subshrub
Height:
150 cm
Light Requirements:
Part Shade
Drought Tolerance:
High
Bloom Months:
apr,may,jun,jul
Bloom Colors:
blue, purple, violet

Wildlife Benefits

Bees:
★☆☆☆☆ Documented bee visitation (GBIF)
Butterflies & Moths:
★☆☆☆☆ Documented Lepidoptera association (GBIF)
Caterpillars:
★☆☆☆☆ Recorded caterpillar host plant (HOSTS Database)

Host Plant for Caterpillars

Variable checkerspot (Euphydryas chalcedona)

Reported Fauna Sightings

Bees: van Dyke bumble bee (Bombus vandykei), Yellow-faced bumble bee (Bombus vosnesenskii)

Garden & Ecology Notes

Wildlife Value:
bees, hummingbirds, butterflies
Deer Resistant:
Yes
Fire Ecology:
Fire adapted — tolerates or benefits from fire
Fire Notes:
Resprouts from root crown following fire; common in chaparral and foothill ecosystems with periodic fire.

Soil Requirements

Soil Type:
sandy, well-drained, nutrient-poor soil
pH:
6.0 - 7.5 (slightly acidic to neutral)
Drainage:
excellent drainage required
Moisture:
dry to moderate
Notes:
native to rocky slopes and open woodlands

Propagation & Germination

Stratification:
Cold/moist stratification required — 30–90 days
Germination Time:
14–30 days
Notes:
Light aids germination. Seeds germinate best at cool temperatures around 55-65°F.

The above propagation data sourced from Claude AI

Pre-treatment: Seeds should not be treated with dry heat as it decreases germination. Seed germination is stimulated by the presence of charred wood or aqueous extracts of it.

Establishment: The plant is found within the mattoral vegetation association of California. The protocol does not provide specific temperature or time range for germination.

Source: npn.rngr.net

ORGHPS Germination Guide: Sow @ 20C. Germinates within 3 months.

Source: Ontario Rock Garden & Hardy Plant Society