Mountain Ninebark
Physocarpus monogynus
- Native to:
- United States
Stan Shebs






Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Rosaceae
- Genus:
- Physocarpus
- Species:
- Physocarpus monogynus
- USDA Symbol:
- PHMO4
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Shrub
- Height:
- 120 cm
- Light Requirements:
- Full Sun
- Drought Tolerance:
- Medium
- Bloom Months:
- may,jun,jul
- Bloom Colors:
- white, pink
- Landscaping Shrub:
- Yes
Wildlife Benefits
- Bees:
- ★☆☆☆☆ Documented bee visitation (GBIF)
- Butterflies & Moths:
- ★☆☆☆☆ Documented Lepidoptera association (GBIF)
- Caterpillars:
- ★☆☆☆☆ Recorded caterpillar host plant (HOSTS Database)
Keystone Species Ranking
- Caterpillar Keystone:
- ★★★☆☆ Butterfly & moth species supported by this genus (NWF)
Host Plant for Caterpillars
Holly Blue (Celastrina argiolus)
Garden & Ecology Notes
- Wildlife Value:
- birds, bees
- Deer Resistant:
- Yes
- Fall Color:
- yellow, orange
- Fire Ecology:
- Fire adapted — tolerates or benefits from fire
- Fire Notes:
- Resprouts from root crown following fire; tolerates moderate fire regimes in montane habitats.
Soil Requirements
- Soil Type:
- rocky, well-drained sandy loam
- pH:
- 6.0 - 8.0 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- dry to moderate
- Notes:
- adapted to rocky slopes and open woodlands
Propagation & Germination
- Stratification:
- Cold/moist stratification required — 60–90 days
- Germination Time:
- 14–30 days
- Notes:
- Seeds require cold stratification; may also germinate with fall sowing.
The above propagation data sourced from Claude AI