Tree stumps can spread decay and invite unwanted species into your yard. ... A tree stump can also grow fungi, which is dangerous for pets and small children. It is best to get the entire stump removed to prevent decay, mold, or infected wood from spreading. The health of your yard depends on it.

What happens if you don't remove tree stump?

And yes, over time a rotting stump becomes a hub for home damaging pests like termites or carpenter ants. So, while you can opt to leave the stump and let it rot, the critters that come along in the process might spread out to other plants and trees in your yard or even invade your home.

How much of a stump should I leave?

If you are going to pull or dig them out by hand then you will want enough of a stump left so you can get some leverage. So yes a foot or two would be best. If you are going to remove them by grinding, burning or chemical means then you want to cut the stump as close to the ground as possible.