Ask-a-Dave's-Gardener: Jane Magnolia Leaf Disease, 2 by rwbondy

rwbondy wrote:
I planted a Jane Magnolia this past spring (2021) in growing zone 7a. The site is southwest facing with full sun. The shrub had full flower pods, some of which bloomed, others seemed to \"rot\" away and never open. Big, green leaves opened shortly thereafter, but later in spring and then into summer, the leaves began to get white spots all over them, and some began to yellow and drop off. Late summer, a new flush of growth started at the base of the plant with new leaves growing \"inside\" the older branches (looks like a shrub within a shrub). Meanwhile the older branches have small flower pods started for next spring presumably. So, the question is, is my magnolia okay? What is the going on with the spotty leaves? I\'ve included a picture of what it looked like a week ago. Since then, more leaves have yellowed and dropped. Should I be doing anything to help?