I've had an daphne in a large clay pot for about 2-3 years. Transplanted to a larger pot 1 1/2 years ago. This summer it started getting a mildew or velvety in areas of the joints and some leafing areas. I've never pruned it. Started from a cutting, it's about 2 ft. by 2 ft. Blooms beautiful. Purple/pink flower. It's on a covered 8x8 porch open on the south and west side. Live in Northern Calif.