Peach and Nectarine dropping yellow leaves
I have the two trees in containers and I notice that both are dropping spotted yellow leaves. Not at the tip, but all over the leaf.
I was reading an extension trouble shooter which stated that it is more likely to be nitrogen shortage rather than bacterial spot as bacterial spot shows at the tip of the leaf.
My question, bearing in mind the containers, what would be the best material, plus application method to correct the problem?
Help would be greatly appreciate.