Known to be toxic - Toxic to mammals if ingested.
Source: Adrian S Pye
Juglans nigra
Black Walnut
Noyer noir
Obsolete Names
American walnut
Seeds available at table Mixed Sun, Medium
We currently accept seeds for this plant
Bloom colour: Green
Bloom period: May - Jun
Max Height: 100.0 feet
Max Width: 100.0 feet
Light condition:
More than 6 hours of direct sun a day
Soil conditions:
Tolerates medium soil condition
More than 6 hours of direct sun a day
Tolerates medium soil condition
Lifespan:
Perennial
plants that will that come back year after year
Gardener Experience:
Does not spread uncontrollably
Self-seeding
Does not spread uncontrollably
Self-seeding
Landscape uses:
No landscape information available.
Ecological Benefits:
No ecological benefits information available.
Tolerates:
Tolerates limestone conditions
Tolerates acidic soil conditions
Tolerates juglone conditions
Tolerates limestone conditions
Tolerates acidic soil conditions
Tolerates juglone conditions
Special Features and Considerations:
This plant causes skin rashes
This plant causes skin rashes
Plant Location
Native to Ottawa region: No
Thrives in Ecozones
- Mixed Wood Plains
Ecological Benefits
Butterflies Supported by Juglans nigra
- Polygonia faunus (Green Comma)
- Prochoerodes lineola (Large Maple Spanworm)
- Satyrium calanus (Banded Hairstreak)
Specialized Bees Supported by Juglans nigra
No bee data available for this plant.
Plants that grow in similar conditions, that bloom at the same time.
Complementary Plants
- No complementary plants found.
Substitute For Non-Native Plants
- Rhamnus cathartica (Common Buckthorn)
- Rhamnus frangula (Glossy Buckthorn)
- Acer japonicum) (Japanese Maple)
- Acer platanoides (Norway maple)
- Juglans nigra (Black Walnut Cultivar)
Sowing Information
Download Sowing Label (PDF)
- Sowing depth: Sow 1-2 inch deep
- Sow anytime
- Stratification duration: 0 days
- Self-seeding
- Notes: Soak for 24h.
Harvesting and Seed Sharing
- Harvest start month: September
- Harvesting indicator: Pods are released from plant
- Harvesting mean: Nut has been released from tree
- Seed viability test: Put seed in container filled with water. If the seed goes at the bottom of the container, you can donate. If seed floats, do not donate.
- Packaging measure: Six (6) seeds (eyeball)
- Seed storage: Air dry in paper bag or open container, for a few days until crisp, shaking seeds to move them once in a while to prevent molding
- At least one cultivar: Yes, do not donate unless you know source, and there are no known cultivars in your garden or at proximity
- No harvesting video available at this time.
Toxicity Notes
Toxic to mammals if ingested.