Hello all, I am new to the forums here and hoping someone with more experience can advise me. I moved onto my home about two years ago, and one of the challenges we are facing his juglone toxicity due to 4 large mature black walnut trees on the north and west sides of our property, and countless more in our neighbors yard.
I read somewhere that most Stone fruits like plums and cherries are tolerant to juglone so I went ahead and planted my 3 Nanking cherry bushes on the west side of our front yard. Not directly under any black walnut trees, but still less than 50 feet from any drip line. One of them has seemed stunted and I wasn’t sure why, until today when I ran across something saying that Nanking cherries are infact susceptible to juglone. And I imagine the juglone toxicity is pretty high seeing as there are so many mature trees here, 3 within 50 feet of my Nanking cherries.
So I’m thinking it would be best to relocate them to the other side of my yard, far away from any black walnut trees. They are still dormant, so I have time to move them but wanted to see if anyone had any advice. They did bloom and fruit last year without a problem, so is it really necessary? I also have daffodils planted around them that were planted in the fall and I’m afraid of disturbing them as well, and I’ve seen mixed opinions on whether or not daffodils are tolerant of juglone as well.
From what I have read (can’t confirm), the best ways to counter juglone are to greatly increase the bio activity of your soil with compost and heavy mulch, plant a barrier of juglone tolerant plants, and water more during dry periods.
posted 8 months ago
Thanks. The cherries are planted in a prepared bed that I dug out 3 years ago and amended. It has excellent drainage and is on a hill, which is uphill from the black walnut trees. After doing a bunch of research I’ve decided to leave them here and see how they do. They didn’t show any signs of juglone poisoning last year other than the one tree just not growing as much as the other two. There’s a lot of conflicting info.. someone says all prunus species are tolerant, another says Nanking cherry specifically is sensitive.. going to have to do my own experimenting on this one.