Hello, I have a young magnolia soulangeana with some health problems. It bloomed the first spring we had it, but then the leaves turned grey at the tips and eventually dropped off. The nursery it came from recommended a 10-10-10 fertilizer which seemed to stop that problem. Later in the summer, however, it got what looked like powdery mildew - there were grey spots, which became brown spots, and then the leaves fell off. This spring, there were no blooms, just lots of leaves. (Too much fertilizer maybe?) I gave it a little fertilizer again in the early spring. The mildew-like symptoms are still there even though there are lots of new leaves and more coming. (as in the attached pix.) My questions would be .. Does it have mildew and what would be the best thing to do for that? Is there something to do to encourage blooms in the spring? Is there a more organic approach to fertilizer that would be good for this type of tree? Thanks for any suggestions or comments!