🚀 go-pugleaf

Hi: I've read that certain plants won't grow near mature black walnut trees. I 
had the pleasure of witnessing this phenomenon this summer. Most of the plants 
in my vegetable garden grew to a couple of feet tall and then wilted. The 
garden is 10 to 20 feet away from a 50 foot walnut. Apart from digging up a 
new area for a garden or cutting the tree down (I could use the wood for 
making cabinets) I was wondering if there was a way to counteract the effects 
the tree has on vegetable growth. I cannot find any information on what 
exactly is the process involved. Is it a pH thing, a toxin, does it come from 
the roots or decomposing husks? Any help would be greatly appreciated.
						Bill