30 popular tree ring landscape design ideas for your garden
For a perfect circular tree ring, loosely tie a string to the trunk about 12 inches from the ground, extend it to the desired distance, and, keeping the string taught, walk around and mark your line.
You can also use the handle of the shovel as a ruler, set it down, identify the distance on the handle and repeat around the tree. It works well if you can’t find any channels.
