My Black Walnut, out on the street verge, was a volunteer and I just let it grow before ever I heard about their herbicide tendencies. I can attest that irises have no problem growing profusely around mine. So far, I haven't managed to harvest any nuts, because there are so many squirrels in my neighborhood. Probably one of them was responsible for planting mine in the first place!
My Black Walnut, out on the street verge, was a volunteer and I just let it grow before ever I heard about their herbicide tendencies. I can attest that irises have no problem growing profusely around mine. So far, I haven't managed to harvest any nuts, because there are so many squirrels in my neighborhood. Probably one of them was responsible for planting mine in the first place!