Oregon Ash
Fraxinus latifolia
- Native to:
- Canada, United States
iNaturalist: © steveansell (iNaturalist #62230956)






Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Oleaceae
- Genus:
- Fraxinus
- Species:
- Fraxinus latifolia
- USDA Symbol:
- FRLA
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Tree
- Height:
- 2500 cm
- Light Requirements:
- Full Sun
- Drought Tolerance:
- Low
- Bloom Months:
- mar,apr,may
Wildlife Benefits
- Caterpillars:
- ★☆☆☆☆ Recorded caterpillar host plant (HOSTS Database)
Keystone Species Ranking
- Caterpillar Keystone:
- ★★★★★ Butterfly & moth species supported by this genus (NWF)
Host Plant for Caterpillars
Homoncocnemis fortis, Philtraea latifoliae
Garden & Ecology Notes
- Wildlife Value:
- birds, small mammals
- Fall Color:
- yellow
- Fire Ecology:
- Fire adapted — tolerates or benefits from fire
- Fire Notes:
- Resprouts vigorously from the root crown following fire or cutting.
Soil Requirements
- Soil Type:
- rich, well-drained loamy soil
- pH:
- 5.5 - 7.5 (slightly acidic to neutral)
- Drainage:
- tolerates poor drainage
- Moisture:
- consistently moist
- Notes:
- Commonly found in riparian zones and wetlands
Propagation & Germination
- Stratification:
- Cold/moist stratification required — 60–90 days
- Germination Time:
- 14–60 days
- Notes:
- Seeds require cold-moist stratification. Fresh seed germinates more readily than stored seed.
The above propagation data sourced from Claude AI