Drill holes into the top of the stump, using a 1-inch extra-long bit. Make holes all around the stump, leaving a few inches between them. Pour straight, dry Epsom salt into the holes to fill them. Water the holes slowly to be sure that the salt doesn't come back out.
Chemical Method to Remove a Stump
When the tree is as low to the ground as you can get it, drill holes a few inches deep into the stump in various locations. Use the widest drill bit possible; the deeper and wider the holes, the better. Fill the holes first with water and then a fertilizer high in nitrogen. Cow manure can do the trick.
How to Rot a Tree Stump
The stump left behind by a large tree can last up to 10 years without treatment. The exact amount of time it takes a stump to decay varies depending on the species of tree and the conditions in your yard.
Begin the process by combining 100 percent Epsom salt with water to create a solution that will decay the stump's root system. Next, drill about a dozen 1-inch-wide holes into the stump. Each hole should be roughly 10 inches deep. Then, pour liberal amounts of the Epsom salt mixture into the holes