how long does it take for roots to die tree cut down

Question

How long does it take for the roots to die? I had the tree cut down in August after 30 yrs and am about to pour new concrete.

Answer 1

Here are some links with more information.

https://www.gardeningknowhow.com/ornamental/trees/tgen/how-to-kill-a-tree-killing-trees-in-your-garden.htm
https://www.gardeningknowhow.com/ornamental/trees/tgen/kill-zombie-tree-stump.htm