Ask-a-Dave's-Gardener: My Magnolia grandiflora has curled leaves, 1 by ilv2grdn

ilv2grdn wrote:
I have 14 yr. old Magnolia grandiflora. It has grown perfectly ever since I planted it ten years ago.. It has bloomed beautifully for the last three years. We have had average to to below average rainfall every year except this year. So far, we've gotten well above average rainfall. Most of it falling in the last two months. Each side of the leaf has curled under towards the stem, this spring only. Leaves are of healthy color, it has no bugs, no chemicals or other additives to the soil or foliage. No runoff or drifting chemicals. Old leaves are normal, only new leaves on most, randomly placed, branches are affected. Few branches and blooms are unaffected. Could this excessively wet spring be the culprit?