Black Walnut tree removed, cherry replacement died
Does a black walnut tree toxicity remain in the soil after the tree has been removed? I waited two years to plant a cherry tree in its place, but the cherry tree died. The walnut was removed and stump ground up, but some roots remained. The old tree was about 10’ tall and I didn’t plant the cherry in the exact same spot. Is there something I can add to the soil to counter the old walnut? Thoughts? Thanks so much!
Juglone can remain in the soil after a tree is removed. The accumulation and depletion of toxins in the soil is affected by factors such as soil type, drainage, aeration, temperature and microbial action. Take a look at the links from Virginia Tech and U of Minnesota for more information on reducing allelopathic effects. There are lists of plants tolerant to juglone and they can differ.