Getting rid of trees planted by squirrels
I have several trees that have been planted by squirrels. A couple of them have gotten trunks that are about 2 inches in diameter and are coming up between concrete. I have been cutting them down and putting weed killer on them, but it does not seem to work. Can I drill holes in it and pour something in the holes to kill them for good?
You shouldn't need to drill holes in your concrete. This article provides several methods of killing unwanted trees (without ruining your concrete):