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Juglans nigra

Black Walnut, American Walnut

Tree Characteristics

Leaves:

Deciduous

Height:

15 - 23m

Width:

15 - 22m

Growth Rate:

Fast

Tree Tolerances

Plant Hardiness Zone:

4, 5, 6

Shade Tolerance:

Full Sun

pH Tolerance:

Tolerant of acid to alkaline soil (5.0 to 8.0)

Drought Tolerance:

Moderate

Flooding Tolerance:

Moderate

Salt Spray Tolerance:

Tolerant

Soil Salt Tolerance:

Sensitive

Planting site and Native Range

Planting Site:

Naturalization, Parks, Highway, Residential, Wide Median

Native to Ontario:

Yes

Native to North America:

Yes

Insects and Diseases

No serious or common issues in the urban environment.

Management Notes

  • Fruit litter may be an issue
  • Inhibits the growth of many other nearby plants by exuding allelopathic chemicals