We have a large black walnut tree in our yard along with many other trees. We are mulching all of our leaves with a mower this fall and putting them in a bin to use in the garden later. Is this okay to do with the black walnut leaves? I am concerned about poisoning the garden with them, but if we don’t use them for at least 6 months, should it be okay?
Welcome! I’m Margaret Roach, a leading garden writer for 25 years—at ‘Martha Stewart Living,’ ‘Newsday,’ and in three books. I host a public-radio podcast; I also lecture, plus hold tours at my 2.3-acre Hudson Valley (NY) Zone 5B garden, and always say no to chemicals and yes to great plants.