Heartnut plant profile
Juglans ailantifolia
A perennial fruit for full sun.
Last updated .
When to plant
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.
The calendar shows this cited seasonal window as an approximate band. It does not convert the season into frost-adjusted dates.
Open Heartnut in my garden calendarShows the source-backed planting season, not frost-adjusted dates.
Growing conditions
- Sun
- Full sun
- Lifecycle
- Perennial
- Hardiness
- Zones 5 to 5Find my hardiness zone
Common problems
Watch for these
Also watch for: needs large space, cross pollination helps yield.
Next steps
Continue with Heartnut
Evidence trail
Evidence behind this profile
Original extension and institutional publications behind the planting, care, and safety facts on this page.
- Juglans ailantifolia (Japanese Walnut)
Oregon State University Landscape Plants. Supports general reference. Checked 2026-06-18.