The third method we can use to feed weak trees is with what we call a ground probe. This is a pipe that we have hooked up to our power spray units that when pushed into the root zone of the tree can deliver liquid fertilizer under pressure to the root zone. It is a fast acting fertilizer that when applied under pressure will also aerate the root zone. The Omaha method consists of a liquid iron solution that is injected into the trunk of a tree without the use of a bottle. This method is started around June 1st.
Liquid iron is injected into the tree and the hole is caulked shut.
Burning of leaves can occur in hot, humid summer weather, but it will not damage the tree. In fact, new lush green leaves will soon replace the ones that were burnt.