lantana looks sick
I have lantana that has been planted in clay soil for years and it did quite well. However, this year it started off fine with blooms and then it started getting black shriveled up leaves on the ends of the stems and then all the leaves had this white colored look like I had put seven dust on them which I hadn't. I cut the stems way back and they came back looking the same. What's the problem. Thanks for your thoughts on this subject.