Oak Summit Nursery
Manitoba Black Walnut
Manitoba Black Walnut
Fall 2026 plant sale
Fall plant ordering opens in September. Shipping begins in October 2026.
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These Black Walnut trees were grown from locally collected Manitoba seed selected for cold hardiness and nut production. Mature Black Walnuts are uncommon in southern Manitoba, making this a locally adapted source compared with trees from warmer regions.
Black Walnut has a straight trunk and an open rounded crown. Round green husks about the size of an orange fall in early October, each containing an edible walnut. Compound leaves can reach 24 inches long.
Cold Hardiness Zone: 3
Seed Source: Manitoba
Mature Size: 80 to 90 ft
Fall 2026 plant sale
Plants are sold seasonally after nursery stock is counted. Fall ordering opens in September and shipping begins in October 2026. Add a reminder and we will email when this listing opens.
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Growing details
- Light
- Full sun
- Soil
- Rich soil with good drainage
- Moisture
- Prefers moist soil without standing water
- Native range
- Eastern and central North America
Cold hardinessZone 3 · Canadian maps for this plant
Zone 3 and warmer
The map shows minimum winter hardiness. Soil, moisture and summer warmth also affect how a plant grows.
About these maps
Climate: Natural Resources Canada, 1991–2020. Provincial distribution: VASCAN via retained botanical research. Province outlines: Natural Earth, public domain.
Open Government Licence – Canada