We have recently planted a magnolia tree in late January. Lots of the leaves have turned brown and are falling off. There are new buds for flowers on the tree. Could this be stress from replanting or do I need to be doing something special for the tree? The tree is at least 10 ft. tall and was bought in a large container from a nursery. I live in north Florida and have watered the tree daily due to this being such a dry year without rainfall to speak of. Please help me as I do want to save this tree. It is very special being as it was planted in memory of my late husband. Thank you!