Japanese Walnut, Siebold Walnut

Juglansailanthifolia

Family
Juglandaceae (joo-glan-DAY-see-ee)
Genus
Juglans (JOO-glanz)
Synonym
Juglans ailantifolia
Juglans sieboldiana
Sun Exposure
Full Sun
Foliage
Grown for foliage
Deciduous
Shiny/Glossy
Height
20-30 ft. (6-9 m)
30-40 ft. (9-12 m)
over 40 ft. (12 m)
Spacing
30-40 ft. (9-12 m)
Hardiness
USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
Danger
Parts of plant are poisonous if ingested
Handling plant may cause skin irritation or allergic reaction
Bloom Color
Green
Bloom Time
Late Spring/Early Summer
Other Details
Category
Edible Fruits and Nuts
Trees
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Where to Grow
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
6.1 to 6.5 (mildly acidic)
Patent Information
Propagation Methods
From seed; direct sow outdoors in fall
Seed Collecting
Remove fleshy coating on seeds before storing
Wear gloves to protect hands when handling seeds
Regional

This plant is said to grow outdoors in the following regions:

Hawthorne, Florida

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Gardener's Notes:

1
positive
0
neutral
0
negative
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Hawthorne, FL (Zone 8b) | April 2009 | positive

This tree seems confused in this climate (zone 8b). It stays green until a hard freeze hits, then sends out new leaves very early and so...Read More

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