Oak Summit Nursery
Black Walnut Seeds
Black Walnut Seeds
Pack contains: 10 walnuts
Black Walnut (Juglans nigra) seed was collected from mature Manitoba trees selected for cold hardiness and nut production under prairie conditions. Unlike seed brought in from warmer provinces, this source has already been exposed to the colder winters of southern Manitoba.
The edible nuts mature inside round green husks about the size of an orange and usually drop in early October. Mature trees have a straight trunk, an open rounded crown, and compound leaves up to 24 inches long. Black Walnut roots produce juglone, although its effect on nearby plants is often less severe than commonly assumed.
Walnuts can have deep dormancy. Some nuts germinate promptly in spring, while others need more time and may continue germinating into late summer.
Notify me when back in stock
Enter your email to add a back in stock reminder for this item.
Manage this reminder with your saved products from the header.
Starting this seed
- Cold4 monthsCold stratification
- SowAfter the cold stage
- Seed source
- Manitoba
- Hardiness
- Zone 3
- Mature size
- 80 to 90 ft
How to stratify seed
In the fridge. Put the seed in a bag with a damp medium such as peat moss, vermiculite, sand or coco coir. The medium is only there to hold moisture. Keep the bag in the fridge, above freezing, for the cold period shown, then sow.
Or outside. Sow the seed outdoors in the fall and let winter do the cold period.
The plant these seeds grow into
Growing details
- Native range
- Eastern United States into southeastern CanadaIncluding Manitoba, Ontario and Quebec
- Light
- Full sun to part shade
- Nuts
- Sweet nutmeat
- Pollination
- By windMale and female flowers are on the same tree
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
Butternut Seeds
American Elm Seeds
Smooth Sumac Seeds
Osage Orange Seeds
Banyan Tree Seeds for Bonsai