Black Walnut
Juglans nigraTree with edible nuts. Excellent native nut tree; valuable timber; allelopathic
What to know before finding it a place.
Growing notes for our conditions.
Regional fit still depends on the actual site—especially drainage, exposure, irrigation, soil and the specific cultivar selected.
Oklahoma notes
Excellent native nut tree; valuable timber; allelopathic
Disease resistance
Very disease resistant
Pruning
Minimal; remove dead wood
Care
Juglone-producing roots suppress many plants; plan placement carefully
Drought tolerance
High once established
Plan the partners before planting the tree.
Pollination reference
For fruiting plants, compatible bloom timing and nearby partners can matter as much as the cultivar itself.
The cultivar can matter as much as the species.
These references help narrow the large number of named varieties to options better aligned with Zone 7A conditions, disease pressure and useful harvest windows.
Zone 7A Recommended Varieties
These are recommendations carried in the Organix Zone 7A reference database. They are not automatically the same as a cultivar personally proven by Organix on every site; site conditions and availability still matter.
How this plant can function in a larger system.
Landscape functions
Edible; Suppressor
Edible parts
Nuts
Companion plants
Black raspberry, currant — keep away from nightshades
Community / companion role
Pollination: Self-fertile (wind); Companions: Black raspberry, currant — keep away from nightshades
Food-forest layer
Canopy
Oklahoma classification
Secondary
Support the plant without overcomplicating the system.
Soil preferences
Preferred pH 6.0-8.0
KNF / fertility schedule
Minimal; fall compost tea
Maintenance
Minimal; remove dead wood
Plant performance varies with microclimate, soil, drainage, water, maintenance and cultivar. Organix uses the library to narrow good candidates, then makes final selections around the actual site.
Edible and medicinal tags describe traditional or practical plant uses in the landscape and are not medical advice. Always verify identification, preparation and individual suitability before consuming a plant.