Doris from Fresno, Ca writes
One elm has 22 inch diameter and the other has a 23 inch diameter (they are huge trees). They were recently thinned out by an arborist. Their root systems totally overlap.
The trees should be treated as separate trees. When applying merit your aim is to treat the roots that are close to each tree, not at the outer limits of the dripline. Instead go out about a foot from the base of the tree and do the application there in a bout a two foot band.
Answer last updated on: 01/28/2013
