Tropicals & Tender Perennials: What is it ?, 0 by jerodsmom

jerodsmom wrote:
Alot of my hoya's are starting to get this coloration on the leaves. It starts out as little red spots and then becomes big blotches. I have had a couple spots on some of the leaves turn black. I am wondering if it is from too much sun. I took my shade cloth down about a month ago and we have had alot of cold clear day's. I am also wondering about air flow. I have two small fans facing each other from opposite ends of the greenhouse. Any idea's would be much appreciated.

Patricia