Black Walnut: What It Is and How to Use It
Black walnut (Juglans nigra) is a North American tree whose green hulls — the fleshy covering around the nut — have been used in traditional herbalism and as a natural dye for centuries. You can find dried black walnut hulls at William's Natural Foods, 12249 San Pablo Ave, Richmond, CA 94805, in our bulk herb section.
Available in Bulk
We carry black walnut hulls in our bulk herb section, so you can grab the exact amount you want — from a spoonful to try in a blend to a full bag for ongoing use. Our staff can help you find them and answer questions about traditional preparation.
What We Carry
We stock black walnut hulls in cut and sifted form, sold by weight. We also carry a variety of traditional barks, hulls, and dye plants in bulk for customers interested in old-fashioned herbal and craft uses.
Frequently Asked Questions
What do black walnut hulls taste like?
Strongly bitter, astringent, and earthy — black walnut hull is not a casual sipping herb. It is traditionally used in small amounts in blended formulas, often alongside herbs like wormwood and cloves in old-fashioned herbal combinations. The intense flavor is part of why it has always been used sparingly.
What was black walnut traditionally used for?
In American folk herbalism, black walnut hull was traditionally used in seasonal herbal blends and as a natural dye — it produces a rich, colorfast brown that was prized for dyeing cloth, wood, and even hair. The hulls contain juglone, the compound responsible for both the deep stain and the tree's famous ability to suppress other plants growing beneath it. These are traditional uses, not medical recommendations.
Can black walnut stain?
Yes — dramatically. Fresh hulls will stain skin, clothing, and countertops a deep brown that lasts for days. Even the dried herb can discolor light fabrics and porous surfaces. Wear gloves when handling it and use dedicated utensils if you prepare it at home.
How is black walnut hull usually prepared?
The traditional preparation is a decoction — simmering the cut hulls in water — or a tincture made by soaking them in alcohol. Because the flavor is so intense, it is almost always blended with other herbs. Store the dried hulls in an airtight container away from light.
Did you know? During the Civil War, the Confederate army used black walnut hull dye to color its uniforms — the resulting "butternut" brown-gray gave Southern soldiers one of their nicknames, the "butternuts" (source: Smithsonian / National Park Service histories of Civil War uniforms).
Visit William's Natural Foods at 12249 San Pablo Ave, Richmond, CA — open Monday through Friday 9 AM to 7 PM, Saturday 9 AM to 6 PM, and Sunday 10 AM to 5 PM. Our staff are happy to help you find black walnut hulls in the bulk herb section.
This guide is for general information only and is not medical advice. Talk to your doctor or a qualified health professional about any health questions.