[greeneyes]

Do you know whether they can tolerate the toxins from walnut trees? I have a space near some walnut trees that needs something to grow.

[SisterK]

I really don't think that sweet potatoes would be happy under black walnut trees. If you have access to hardwood, I would highly recommend growing shiitake mushrooms in that space. Or another mushroom. I can talk you through shiitake mushroom cultivation, because I have grown a lot of shiitake. I have never grown other types of mushroom. Shiitake dries very easily, and it is a more nutritious mushroom.