Avoid: vegetables under black walnut
AvoidNightshades / cucurbits (many) with Black walnut canopy / roots
Juglone from walnut roots and litter harms many vegetables. Map walnut driplines and keep food beds outside that zone or use raised beds with barriers—research your species.
In the garden
- If you must garden nearby, containers on pavement may be the safest hack.
Spacing & timing
When in doubt, extension bulletins for your state list juglone-sensitive species.