Answer: It sounds as though some large trees in the area are producing suckers from the roots. Anywhere the roots grow underground, suckers will pop up. The problem with killing the suckers with chemicals is that the chemicals can travel to the roots of the trees and kill them off, as well. The best approach is to pull the suckers out of the ground, or dig them out, or mow them down as soon as they appear. Wish there were a better solution!
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