Blue Ash
Fraxinus quadrangulata
Last reviewed: September 2026

Toxicity unknown
Blue Ash (Fraxinus quadrangulata) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.
Light
full sun
Water
medium
Size
360"–720" H × 240"–480" W
Bloom
Apr, May
Native to
AL, AR, GA, IA and 14 more states
Pollinators
bees, beetles
Before you buy
Your city may pay you to plant this
Cities and water utilities offer rebates for replacing lawn with native and water-wise plants. We track 452 programs across 44 states, each with a link to the provider and the date we last checked it.
Find rebates in your areaBrowse plants for this ecoregion
Blue ash is a large native shade tree that develops distinctive four-angled twigs and yellow fall color. It grows 30-60 feet tall with a broad, rounded crown that provides excellent shade for large landscapes.
In an HOA neighborhood
Blue Ash is an HOA-friendly choice. Maintenance level: low. Tidiness: 4 out of 5.
Works well in: front yard, street edge, mid zone.
- Very large mature size may not suit smaller lots
- Deciduous leaf drop requires seasonal cleanup
Wildlife value
This tree supports bees and beetles during its April-May blooming period. As a native ash species, it provides habitat and food sources for various wildlife.
Common questions
- How much sun does Blue Ash need?
- Blue Ash grows best in full sun conditions.
- When does Blue Ash bloom?
- Blue Ash blooms in April and May.
- Where is Blue Ash native?
- Blue Ash (Fraxinus quadrangulata) is native to AL, AR, GA, IA and 14 more states, per the World Checklist of Vascular Plants (Kew).
- What pollinators does Blue Ash attract?
- Blue Ash draws bees and beetles.
- Is Blue Ash HOA-friendly?
- Blue Ash is generally an HOA-friendly choice in the right placement, with low maintenance.
Native range data from the World Checklist of Vascular Plants (Kew). Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
If something looks wrong
Common plant problems, and what to check first
These come up on almost any plant. Each guide lists the likely causes in the order they are worth ruling out, with one thing to check before you act on any of them, and links to the source it came from.
- It is dying right after planting
- Leaves turning yellow
- Wilting even though I watered it
- Brown crispy leaf tips
- Bugs on the plant
Ready to grow Blue Ash? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
Planning a bed around it? Start a free plan with this plant
Not sure where to start? Take the 2-minute yard quiz