Interesting, Ann. I knew there were other allelopathic plants besides the Black Walnut. Funny, there are hundreds of trees of heaven around here that sprout by the dozens, but I have never noticed a lack of weeds around them.

I did not read the other article you posted. It was too long for my limited lunch hour. I'll have to get to that later.

Thanks for posting.

Barbara

Thank you, ann! I was one with additional question about allelopathy in plants. (And thanks for the term. I had heard and forgotten it!)