Japanese walnut
Juglans ailantifolia
A genus split is not a placement verdict.
Is this one for your yard?
Enter your ZIP to see whether this is legal to plant in your state, and whether it survives your winter.
- Form
- tree
- Rated in
- Global
United States / Grow / Japanese walnut
On this lot
1. Fire evidence and conditions
- Fire evidence
- Mixed evidence — location does not change the cited classification.
- Fire-performance conditions
- Fire ecology context
- Placement evidence
- Evidence regions
- Global
- Maintenance
2. Why this plant is relevant here
- State distribution
- Documented in MA, ME, NY, RI.
- Native range
- Introduced / established
- 1 sourced range or established record. This is not an invasive warning.
- USDA hardiness
3. Legal, ecological, and broader status
- Legal-list status
- Seed-list status
- Reported invasive here
- Broader regional context
- Federal context
How to read this page
The status above is computed from the cited rows below: independent recommendations can support a fire-resistant result, an avoid row can produce keep-away, and disagreement stays visible as conflict. Placement notes preserve each source’s own scheme rather than translating unlike rules into one scale. This is evidence about a plant, not permission to plant it in every part of the defensible space; Zone 0 remains noncombustible.
The evidence
Listed without a rating (30)
Corroboration (30 rows from 1 source)
-
FLAMITS: FLAMmability plant traiTS database
-
Primary study Harada2001: Harada, T. (2001). Time to ignition, heat release rate and fire endurance time of wood in cone calorimeter test. Fire Materials, 25, 1617.
-
-
“time to flaming (s): 116”
FLAMITS record 18851.
-
“time to flaming (s): 76”
FLAMITS record 18852.
-
“time to flaming (s): 26”
FLAMITS record 18853.
-
“time to flaming (s): 16”
FLAMITS record 18854.
-
“time to flaming (s): 185”
FLAMITS record 18855.
-
“time to flaming (s): 55”
FLAMITS record 18856.
-
“time to flaming (s): 23”
FLAMITS record 18857.
-
“time to flaming (s): 17”
FLAMITS record 18858.
-
“time to flaming (s): 25”
FLAMITS record 18859.
-
“time to flaming (s): 16”
FLAMITS record 18860.
-
-
-
“mass loss rate per area (g/m² s): 8.4”
FLAMITS record 18966.
-
“mass loss rate per area (g/m² s): 9.4”
FLAMITS record 18967.
-
“mass loss rate per area (g/m² s): 9”
FLAMITS record 18968.
-
“mass loss rate per area (g/m² s): 10.8”
FLAMITS record 18969.
-
“mass loss rate per area (g/m² s): 8.9”
FLAMITS record 18970.
-
“mass loss rate per area (g/m² s): 7.3”
FLAMITS record 18971.
-
“mass loss rate per area (g/m² s): 8.4”
FLAMITS record 18972.
-
“mass loss rate per area (g/m² s): 9.3”
FLAMITS record 18973.
-
“mass loss rate per area (g/m² s): 7.7”
FLAMITS record 18974.
-
“mass loss rate per area (g/m² s): 8.9”
FLAMITS record 18975.
-
“energy flux (kW/m²): 86”
FLAMITS record 19081.
-
“energy flux (kW/m²): 95”
FLAMITS record 19082.
-
“energy flux (kW/m²): 90”
FLAMITS record 19083.
-
“energy flux (kW/m²): 114”
FLAMITS record 19084.
-
“energy flux (kW/m²): 96”
FLAMITS record 19085.
-
“energy flux (kW/m²): 80”
FLAMITS record 19086.
-
“energy flux (kW/m²): 89”
FLAMITS record 19087.
-
“energy flux (kW/m²): 101”
FLAMITS record 19088.
-
“energy flux (kW/m²): 94”
FLAMITS record 19089.
-
“energy flux (kW/m²): 102”
FLAMITS record 19090.
-
-
-
