I found out that those old black walnut hulls will work too. There is a 50+ year old tree next door and 2 years ago I tried to grow tomatoes in my back yard. Couldn't do it. I found out that the hulls that fell in my yard have poisoned the ground. The odd thing is that my mother and father had a garden back there from about 1974 - 1987 , with no problems...
We used the green ones whne I was a kid, with garbage can lids, to have wars with each other. It was OK until you got hit on the head with one...
Larry
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