Bunchleaf Penstemon
Penstemon heterophyllus
- Native to:
- United States
John Lindley and Joseph Paxton , drawing by L. A. L. Constans






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.