When you say large circulation fan, just how big do you mean? It almost looks like its damage from the leaves hitting each other under a high prolonged wind. If your blowing a fan directly on the plants, you shouldn't get too strong with it. They should look more like they are dancing and swaying as opposed to bending over in a hurricane.

However, it might pay you to look very carefully on the undersides of the leaves for tiny insects...as the pattern of decay sorta looks like leaf miners.
TANKJR Reviewed by TANKJR on . Need Help Please > > Plant Trouble (Visible Leaf Damage) With Pictures New to the site here. I am a medical patient trying my best to become self sufficeint and supply my own meds and I am having a problem that seems to be getting worse by the day. I noticed this starting about 3 days ago. I have looked through many threads but I can not tell what the problem is with this lady. I have another strain that has lived along side and received everything the same as this one but with no ill effect. These started in a 3'x3'x3' vented box in a garage attic with approx Rating: 5