I have sprouts in my yard I believe are Norway Maple. These come up in my planted shrubs and plants and many unwanted places. I don't find them on the noxious weed list. I have to clip them off as close to the ground as I can to keep them from taking over. Is there anyway to control them? My neighbor does nothing to control them and lets them become trees in their yard.
Larimer County Colorado
It's very possible they are Norway maple seedlings. This tree is considered problematic in other parts of the United States, where there is more moisture. You are doing everything right--just keep cutting them back as you find them. They are unlikely to sprout again. They are true seedlings--formed from the samaras the mother tree produces each year.