Planted Sweet Gum Tree month ago, 2 of the 3 started getting brown spots on the leaves. Kept deep watering, added Iron. Weather turned hot and the two trees started a dying of leaves from the bottom up. The third tree is doing well, some minor spotting.
Read in paper that our soil is very alkaline with iron in the soil however plants don’t get iron as the PH is too high? Currently the two sick trees have only the top 1/2 of the tree that is still green but has lots of brown spots.