How to grow Black Walnut

Juglans nigra

Full Sun
OR
Partial Sun
High

Growing Black walnut from seed

require stratification

Soil temperature should be kept higher than -1°C / 30°F to ensure good germination.

Transplanting Black walnut

One-year-old seedlings usually are adequate, but they should be at least ¼-inch and preferably 3/8-inch in diameter 1 inch above the root collar. Seedling age and height are less important than stem diameter.

Bareroot seedlings are adequate for most planting sites. Plant them before bud-break. Containerized seedlings are much more expensive, but they can be planted later in the growing season and when soil is drier.

As Black walnut is very hardy, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.

Harvesting Black walnut

Place nuts in a bucket of water to soften and then peel the husks by hand.
Wear clothing and gloves for protection from stain in the husks. After removing husks, rinse nuts in water. Discard nuts that float.

How long does Black walnut take to grow?

These estimates for how long Black walnut takes to sprout, grow and harvest are from real observations from real gardeners, right around the world.

Days to Germination How long does it take Black walnut to germinate?: 120 days
Average 120 days | Min days | Max days (0)
Days to Transplant How long until I can plant out Black walnut?: + 365 days
Average 365 days | Min days | Max days (0)
Days to Maturity How long until Black walnut is ready for harvest / bloom?: + 10950 days
Average 10950 days | Min days | Max days (0)
Total Growing Days How long does it take to grow Black walnut?: = 11435 days

Other names for Black walnut

Wallia nigra

Footnotes

¹ Missouri Botanical Garden