Oak Summit Nursery
Manitoba Black Walnut
Manitoba Black Walnut
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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.
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Growing details
- Hardiness
- Zone 3Oak Summit nursery rating
- Mature size
- 80 to 90 ft
- Seed source
- Manitoba
- Site and soil
- Full sun; Rich, moist, well-drained soil; Moist but well-drained
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