Most of the times when you cut down an unwanted tree in your garden, its root system remains alive. It dies later due to shock, but sometimes it doesn’t and you need to kill it. With the use of saw or whichever tool you have trim down the stump as close to the ground as possible. This will expedite the decaying process and stump will be decomposed naturally. Killing tree stump from boiling water is one more option you should look at. Boiling will burn the tree roots but for this it is important that water will get to the root system. Wrap the trunk with plastic or other material for a few weeks from which sunshine couldn’t pass through. Keep reading what to do at balconygardenweb.com.