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For a large tree, roots can take 5 to 10 years to completely decay after a stump dies. But that’s rarely a concern for above-ground plants and growth. You can choose to grind up a stump immediately after felling a tree (although it will be tougher wood), or you can wait several months up to a year for the stump to decay. When finished, you can leave any leftover roots in the ground to decompose.

The main disadvantage of stump grinding is that it requires use of heavy and dangerous machinery, meaning you should hire a professional to tackle it, increasing the removal cost. Another drawback of stump grinding is that it can cause root decay in the root system left behind. The remaining wood may develop this type of decay, making it difficult to replant a new tree or plant in that spot in the future.

If a disease has attacked and destroyed the roots, then the tree may fall over as soon as it has died or while part of it is still alive. Trees that die with their roots left in place tend to stay standing for much longer, but those roots will decay eventually, allowing gravity to do the rest.

Although many tree roots will continue to grow after the tree has been cut, there are a handful of exceptions to this rule. While species like elms, ficus, and willows have roots that will regrow with a vengeance, pine, oak, and maple roots will die when they’re cut down. If you’re not sure what kind of tree roots you’re dealing with, there’s a simple way to find out. New sprouts on old trunks, stumps, or exposed roots are a sign that the root system is still hard at work.