How, When and Why of Forest Farming Website

Japanese, Siebold

General
Common NameJapanese, Siebold
Latin NameJuglans ailantifolia
CategoryNuts 
FamilyWalnut 
Variety 
Visual Traits
Flowermonoecious, self-fertile, June
No Citation Available
Fruit / Nutoval-shaped; thinner shell than North American walnuts; cracks poorly
No Citation Available
Height20m
No Citation Available
Spread15m
No Citation Available
Cultivation
Pollinationwind pollinated
No Citation Available
Propagation methodseed, container
No Citation Available
Pruninglate summer to fall, during dormancy
No Citation Available
Seed treatment and storagecold-stratification required, must protect from rodents if direct seeded or sown in cold frame (fall)
No Citation Available
Seedling treatmentintolerant to root disturbance, plant in permanent location early, protect when young
No Citation Available
Critters
PathogensWalnut bunch disease
No Citation Available
Soils
Moisture and drainagerequires well-drained, moist
No Citation Available
pHalkaline
No Citation Available
Soils and topographymoist woodlands
No Citation Available
Textureloam
No Citation Available
Growth Pattern
Root habitdeep taproot
No Citation Available
Seed-bearing age /max productionbear 3-4y from seed
No Citation Available
Habitat and Climate
Hardiness Zoneto zone 4, hardier than J. ailantifolia var. cordiformis
No Citation Available
Native RangeJapan
No Citation Available
Wind / ice / frost susceptibilitysusceptible to frost damage, needs wind shelter
No Citation Available
Light
Shade toleranceintolerant; canopy species
No Citation Available