Ash species
Fraxinus
Ash species (Fraxinus) is a tree suited to the Colorado Front Range, rated "Not Recommended" on the 2024 Front Range Tree Recommendation List. It matures to about 40–60 ft tall and 30–50 ft wide, and needs medium water. Emerald Ash Borer (EAB) is present in Colorado and many Front Range jurisdictions PROHIBIT planting all Fraxinus species. Existing ash will require treatment or removal.
medium water40–60 ft tall and 30–50 ft wide
Photos



At a glance
- Rating
- Not Recommended
- Botanical name
- Fraxinus
- Variety / cultivar
- Ash species
- Type
- Tree
- Mature size
- 40–60 ft tall and 30–50 ft wide
- Water needs
- medium water
- Colorado native
- No
- Foliage
- Deciduous
- Soil
- clay, loam, sandy
- Soil pH
- 6.0–8.2
- Hail tolerance
- moderate
- Wind tolerance
- moderate
- Salt tolerance
- moderate
Site factors to consider
- Critical: Insects & Diseases
Frequently asked questions
- Is Ash species good for the Colorado Front Range?
- Yes. Ash species is included in the Front Range Plant Finder as a tree suited to Colorado's Front Range, rated "Not Recommended" on the 2024 Front Range Tree Recommendation List.
- How big does Ash species get?
- It matures to about 40–60 ft tall and 30–50 ft wide.
- How much water does Ash species need?
- It needs medium water once established.
- Is Ash species native to Colorado?
- No — it is not a Colorado native, but it grows well on the Front Range.