Last year I planted a redbud "start" provided by the Arbor Association. It looked healthy, planted on the south side of our house, and seemed to have survived our unusually cold winter. As it has leafed out (no flowers this year),I have noticed mildew. Is this normal?

And, should I have had flowers this spring, or is it too young? Neighbors have older trees, and typical of an Oregon spring, the display was fabulous. Thanks.