Black Walnut
Juglans nigra
Even more strongly allelopathic than common walnut, so give it its own zone. Magnificent timber and rich nuts for the patient.
Juglans nigra, the eastern American black walnut, is a species of deciduous tree in the walnut family, Juglandaceae, native to central and eastern North America, growing mostly in riparian zones.
Description from Wikipedia (CC BY-SA).
At a glance
- Sunlight
- Full sun
- Water need
- Medium
- Mature height
- 20 m
- Maintenance
- Low
- Hardiness
- USDA 4–9
- Layers
- canopy
Functional roles
Pollination & soil
Largely self-fertile; a second tree improves cropping.
- Soil
- medium/loam, heavy/clay
- pH
- Neutral
Deep, rich, moist soil.
Propagation
How to make more of this plant for free — the permaculture way.
When: Sow fresh nuts autumn
Companions & conflicts
- ✗Apple — Strong juglone producer; keep well away from apples and most crops.
Prized timber and rich nuts, but very allelopathic (juglone) — give it its own area.
Where to get it
Read more
Seed data pending expert review. Identification photo and description are sourced from Wikipedia/Wikimedia; always confirm a plant in person before eating any part of it.