My neighbor had two Alamo trees for several years and cut down to stumps 3 feet above the ground and they are now sending suckers to the neighbor’s yards next door. How can we eliminate the suckers, as they are popping up all over? Will killing the stump with rock salt eliminate this problem?
This article has info on getting rid of weed tree shoots: https://www.gardeningknowhow.com/ornamental/trees/tgen/weed-trees.htm
And here's another article: https://www.gardeningknowhow.com/ornamental/trees/tgen/how-to-kill-a-tree-killing-trees-in-your-garden.htm