How to grow heartnut

When to plant heartnut

Oregon State University describes heartnut as a cultivar group of Japanese walnut (Juglans ailantifolia var. cordiformis) whose heart-shaped nuts crack cleanly at the suture. It gives no planting date; set out dormant bare-root stock in early spring while the soil is workable.

Heartnut is timed by season rather than your frost dates, so the planting calendar does not generate ZIP-specific dates for it. Check the cited sources below to fine-tune for your area.