Black walnut woodchips

Asked January 16, 2019, 10:19 AM EST

I am having some black walnut trees removed from my property. The stumps will be ground. I'm wondering if those woodchips will be toxic to other plants the same way the black walnut roots, fruit and dripline runoff are. I want to plant other trees and shrubs to replace the black walnuts and don't want the mulch from the removed trees to cause more harm. Should I remove all of the newly ground black walnut woodchips from the property. Thank you for your help. Val

Hennepin County Minnesota black walnut tree walnut tree allelopathy

1 Response

Unless you’re planning on putting in juglone tollerant plants (I’ll include a link below with a list), or compost the chips for about six months, which would allow time for the juglone to breakdown, you should remove the wood chips from your landscaping. https://www.extension.iastate.edu/news/2005/jul/070701.htm