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Black Ash
Fraxinus nigra

A stout-twigged, deciduous tree with narrow, rounded crown of upright branches 50-75' tall and 35-50' wide. Used for lake edges, restorations of wooded swamps and other wooded wetlands. Due to the arrival of Emerald Ash Borer in the Midwest, we do not recommend planting Ash at this time.

USDA symbol: FRNI

General Information

Plant TypeTree
Height80 to 90 feet
Light ExposureSun
Soil MoistureMedium
Bloom ColorPurple, Red
Black Ash (Black Ash<div><em class="small">Fraxinus nigra</em></div>)
Photo credit: Minnesota Wildflowers (Click to enlarge)


Flooding / Inundation ToleranceHigh
General Resilience2
Salt ToleranceHigh
Stress ToleranceFire Tolerant

Pollinator Value: Medium

Bloom MonthsMay
Larval Host ofMoths
Specific Pollinators HostedPlagodis kuetzingi, Sphinx canadensis

Project Planning

Project TypeRestoration, Sandy or Engineered Soils
Coefficient of Conservatism8
Herbivore SensitivityMedium
Rate of SpreadMedium
Soil StabilizationDeep
Vegetative ReproductionAbsent


CountyAitkin, Anoka, Becker, Beltrami, Benton, Blue Earth, Brown, Carlton, Carver, Cass, Chisago, Clay, Clearwater, Cook, Cottonwood, Crow Wing, Dakota, Dodge, Douglas, Fillmore, Freeborn, Goodhue, Hennepin, Houston, Hubbard, Isanti, Itasca, Kandiyohi, Kittson, Koochiching, Lake, Lake of the Woods, Le Sueur, Mahnomen, Marshall, Mille Lacs, Morrison, Mower, Nicollet, Olmsted, Otter Tail, Pennington, Pine, Polk, Ramsey, Rice, Roseau, Sherburne, Sibley, St. Louis, Stearns, Steele, Todd, Wabasha, Wadena, Waseca, Washington, Winona, Wright
EcoregionDriftless Area, Lake Agassiz Plain, North Central Hardwood Forests, Northern Glaciated Plains, Northern Lakes and Forests, Northern Minnesota Wetlands, Western Cornbelt Plains
Approximate Eco ProvinceEastern Broadleaf Forest, Laurentian Mixed Forest, Prairie Parkland, Tallgrass Aspen Parklands