November 15, 2008
The mention of black walnut trees makes many gardeners groan, because all of the plants parts, from leaf to root tip, contain a substance called juglone that causes severe stunting of many plants, including tomato. In fall, black walnut hulls become a car-bashing, foot-bruising problem, too. After you harvest the nuts, you're left with that pile of tarry hulls. Is it really safe to compost them?
Thanks to on-farm research done by Chris Chmiel in Athens, Ohio, the answer is yes. L…