Many years after the old tree roots cut off the germination of how to deal with?
There are two ways to make things easier. One is to dig a circle around the roots and sprinkle with lime.
One way is to find a thick, still alive root, dig a hole in the root, and then fill it with a heavy bottle with a drip bottle, drip it into the hole at the slowest rate, like a drip. I often use second methods, labor-saving, and kill completely.
