I had a very old magnolia (not sure variety) that died as a result of construction (we rebuilt our house) and a drought. We had it removed 4-5months ago. After consulting with an arborist, we had a new magnolia that is fairly mature (20ft tall and about 3ft in diameter) D.D. Blanchard Magnolia put in the same spot 3 weeks ago. The tree looked great with dark green leaves and buds that were about to flower. We pretty much followed the watering schedule (every day for the first week, every other day after that) missing only a couple of days. We hand watered for a 5min soaking around a 2 foot perimeter, careful not to soak the base of the trunk. about a week and a half ago the leaves started to turn brown/yellow and fall off. we have only had one flower come out. Did we damage our tree?? This was a very expensive tree and we need to keep it alive! Should I do some kind of fertilizer or acid treatment? For now we turn on that sprinkler so it will get a couple more watering sessions. I will try to put up pictures when it is light outside.