Fraxinus pennsylvanica
Green ash · also Red ash, Downy ash, Swamp ash
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Fraxinus pennsylvanica, commonly known as green ash, is a widespread native species in eastern and central North America, typically growing in moist lowlands. Historically valued for its adaptability, rapid growth, and tolerance to urban conditions, it was once a common choice for street and park plantings. However, due to its vulnerability to the emerald ash borer, it is no longer recommended for new plantings in most regions.
Where it grows
Trees in each city's inventory, with the share of that city's named trees this species accounts for.
- 129,85837.5%—12 in
- 91,92919.1%15 yr9.4 in
- 82,46527.1%—12 in
- 72,10813.7%—6.7 in
- 23,2447.6%—15 in
- 20,6916.2%41 yr14 in
- 17,9722.5%—16 in
- 9,1262.8%—7.9 in
- 8,99620.0%—15 in
- 6,5327.8%—5.1 in
- 6,0820.88%—14 in
- 4,1712.6%33 yr17 in
- 3,1112.7%—14 in
- 1,9212.6%—9.3 in
- 1,8231.00%—12 in
- 1,7337.3%—12 in
- 6801.5%—6.7 in
- 5750.20%13 yr9.8 in
- 3930.09%3.8 yr2.5 in
- 3242.8%—11 in
- 2860.11%—9.4 in
- 2662.2%—15 in
- 1941.2%15 yr7.9 in
- 1890.40%—11 in
- 1340.38%—21 in
- 1280.18%7.8 yr2.0 in
- 1170.08%—1.9 in
- 690.03%—5.0 in
- 570.01%—3.2 in
- 390.05%—6.3 in
- 360.02%—18 in
- 350.07%15 yr—
- 10.00%——
Traits
- Foliage
- Deciduous
- Mature height
- 30–50 ft
- Canopy spread
- 35–50 ft
- Growth rate
- Moderate
- Soil
- Moist, Well-drained
- Water needs
- Moderate
- Pollution tolerance
- High
- Blooms
- Mar, Apr, May
Trunk diameters across every city: median 11 in, mean 12 in, 90th percentile 20 in. Measured at breast height, as published by each inventory.
Native range
Terrestrial ecoregions where this species is native. Trees in the dataset mostly stand well outside it.
Temperate Conifer Forests
- Alberta-British Columbia foothills forests
- Colorado Rockies forests
Temperate Broadleaf & Mixed Forests
- East Central Texas forests
Other Fraxinus in the catalogue
20 of the top 2,000 species are in this genus.
