http://www.forrestrace.com/flower-mold-3/

Treating what might be mold on my flowering plants leaves?
On several of my flowering plants (gerbera daisies, phlox, and a few others) there appear to be leaf spots or some sort of mold. It looks to be black and brown, and some gray. What is this? What can I do to treat this and make it go away? How can I prevent it from reoccurring?
Cornmeal Juice is a natural fungal control for use in any kind of sprayer. Make by soaking horticultural cornmeal in water at one cup per gallon of water. Put the cornmeal a nylon stocking bag to hold in the larger particles. The milky juice of the cornmeal will permeate the water and this mix should be sprayed without further diluting. Cornmeal Juice can be mixed with compost tea, Garrett Juice or any other natural foliar feeding spray.
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