Black spots and leaf drop on a jade plant question
The leaves on my jade plant develop black spots and then slowly turn yellow and drop off. The process takes about 7-10 days and it always starts with the black spots, sometimes on the edge of the leaf but usually on the top of it. Most of the spots cannot be felt, but a few are very slightly pitted. The leaves are not wrinkled or squishy, but are firm. It is the leaf growth from last year; this years new leaves are not dropping. About ten percent of the plant is affected. Is the normal leaf drop that I have read about? I've never seen anyone mention the black spots. Any input would be appreciated. Thanks.