Juglans ailantifolia var. cordiformis
Heartnut
Common names: Heart Walnut, Japanese Heartnut
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Description
The heartnut is a variety of the Japanese walnut whose nuts, when cracked, display a pleasing heart shape and often split into two clean halves. The tree is more robust and frost‑hardier than the true walnut, maturing later to avoid late frosts. Like its relatives, it produces juglone and should be planted away from sensitive neighbors.
Care instructions
Plant the heartnut in a sunny, spacious location with deep, well‑drained soil. Set it in the fall (November, week 45) and water regularly during the first few years. Harvest the nuts in September (week 38), remove the outer shell with gloves, and allow the kernels to air‑dry before storage.
Pruning
Companion planting
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