Saltpeter (potassium nitrate) is an effective choice. When applied to stumps, it stimulates wood decomposition, breaking it down quickly and giving complete kill.

How long does it take for potassium nitrate to rot a stump?

The potassium nitrate will take around 3-4 weeks to fully rot the stump. After that it is ready to removal. After 4 weeks, you should see that the stump is soft, rotten, and pliable.

How long does it take to kill a tree with Epsom salt?

How long does it take for Epsom salt to kill a tree stump? Following the directions outlined above, it takes 8 to 10 weeks for the stump to die using the Epsom salt method.