Black Walnut

Can I plant gladiolas near a black walnut tree?

Where can a find a complete list of flowers and plants that can grow near a black walnut tree?

Yes you can but they won’t grow. Walnuts produce jugalone, natures equivalent of Roundup. There are many web sites with selections of walnut compatible plants but non do very well. My advice is to use container gardening and keep the walnuts, husks and leaves out of your pots.

American Black Walnuts… Things Joe Likes