Hi --
When is the best time to have pin oak trunks injected with iron. I have consulted several companies with arborists. Some say only fall and, if they do spring or summer, they can only do 1/2 injection for some reason. Others say early spring when the leaves are coming out, and still others say June. I called the Morton Arboretum, and they had no definite opinion. What is your opinion? The fellow who used to treat my tree has left the state; I am looking for someone new. Thank you.
