Black Walnut question as a mulch
After posting on another forum and learning of the potential issues that Black Walnut can pose to plants, I'm trying to determine just how long I should wait before applying mulch from a Black Walnut tree to my flower garden? We have a TroyBilt chipper/mulcher machine which finely chips/mulches branches.
The branches have been in a brush pile for well over a year.
Thanks for any advice/feedback you can provide.