Japanese Walnut

(Juglans ailantifolia)

Japanese Walnut (Juglans ailantifolia)

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Climate Requirements

Precipitation 45" - 77"
High Temp. 71°F - 87°F
Low Temp. 17°F - 37°F

Summary

Juglans ailantifolia, commonly known as Japanese walnut, is a deciduous tree native to mountain forests and riverbanks in Japan and Sakhalin. It can grow up to 66 feet tall and is characterized by its light grey bark and pinnate leaves that turn yellow in the fall. The tree produces spherical nuts that are encased in green husks, maturing in mid-autumn. These nuts are edible and prized for their oily texture and rich flavor.

Japanese walnut is valued for its nuts and is often planted in orchards or home gardens for this purpose. It is also used as a shade tree due to its broad canopy. In cultivation, it prefers full sun to part shade and requires well-drained soil. It is relatively low-maintenance but can be susceptible to walnut blight and root rot. Due to its potential to spread, it is important to check local regulations before planting Juglans ailantifolia outside its native range.CC BY-SA 4.0

Plant Description

  • Plant Type: Tree
  • Height: 70-90 feet
  • Width: 40-60 feet
  • Growth Rate: Rapid
  • Flower Color: Green
  • Flowering Season: Spring
  • Leaf Retention: Deciduous

Growth Requirements

  • Sun: Full Sun
  • Drainage: Medium, Fast

Common Uses

Bird Garden

Natural Habitat

Mountain forests and riverbanks

Other Names

Common Names: Giant Walnut

Scientific Names: Juglans ailantifolia, Juglans allardiana, Juglans allardiana var. acuta, Juglans coarctata, Juglans cordiformis var. ailantifolia, Juglans coreensis, Juglans japonica, Juglans japonica, Juglans japonica

GBIF Accepted Name: Juglans ailantifolia