Black Walnut
(American Walnut)
Juglans Nigra
Occurs naturally in Southern Ontario and central and eastern USA. Occasionally planted in New Brunswick. Popular as a shade tree on larger properties and for its edible nuts. The wood is also valued in carpentry. The tree takes about 8 to 10 years for fruit production to begin. Tree parts and especially roots produce a chemical called juglone that inhibit growth of some plants in the root zone. Trees have both male and female flowers and are wind pollinated. Planting two or more trees will improve seed crop quantity through cross pollination. Mast seed crop every 2 to 3 years.
Additional information
| Foliage | Deciduous |
|---|---|
| Locale | Native to North America |
| Height | Large (60-100ft) |
| Width | Wide |
| Form | Round |
| Growth Rate | Moderate |
| Longevity | Long (over 100 years) |
| Hardiness Zones * | 4, 5 |
| Sun Exposure | Full Sun (over 6 hrs) |
| Soil Preferences * | Moist, Slightly Acidic, Well Draining |
| Soil Tolerances | Clay, Dry, Slightly Alkaline |
| Other Tolerances | Occasional Drought, Occasional Flooding |
| Ornamental Interest | Leaves (shape) |
| Wildlife Value | Birds (fruits/seeds), Butterfly Larvae (leaves), Small Mammals (fruits/seeds) |
| Human Value | Carpentry (wood), Edible (seed) |
| Seed Collection | Ordered Online, Personally in NB |
| Planting Considerations | Allelopathic, Intolerant of Full Shade, Messy Seed Litter |
