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Heartnut

Heartnut

Heartnut

(Japanese Walnut)

Juglans Ailantifolia var. Cordiformis

This native of Japan is a variety of the Japanese Walnut that produces heart shaped nuts. Growing from seed can produce variations in the offspring’s nut shape, size and ease of cracking. For true specimens, grafted trees must be grown. It will typically begin producing fruit within 10 years. Tree parts and especially roots produce a chemical called juglone that inhibit growth of some plants in the root zone. Trees have both male and female flowers and are wind pollinated. Planting two or more trees will improve seed crop quantity through cross pollination. Can be susceptible to late spring frosts which will terminate flowering and subsequent fruit. Hybridizes readily with other walnuts including Butternut to produce offspring called Buartnut. Should not be planted near natural stands of Butternut.

Additional information

Foliage

Deciduous

Locale

Native to Asia

Height

Medium (30-60ft)

Width

Wide

Form

Broad

Growth Rate

Fast

Longevity

Long (over 100 years)

Hardiness Zones *

5

Sun Exposure

Full Sun (over 6 hrs), Partial Sun (4 to 6 hrs)

Soil Preferences *

Moist, Slightly Acidic, Well Draining

Soil Tolerances

Clay, Slightly Alkaline

Ornamental Interest

Leaves (shape)

Wildlife Value

Birds (fruits/seeds), Large Mammals (fruits/seeds), Small Mammals (fruits/seeds)

Human Value

Carpentry (wood), Fuel (wood)

Seed Collection

Ordered Online

Planting Considerations

Allelopathic, Messy Leaf Litter, Messy Seed Litter