seilMI said:The fungal spores are in the soil. If it rains very hard those spores can be splashed up onto the leaves. Which is why black spot usually starts at the bottom of your plant and then moves upward. But the spores are also floating in the air and land on the leaves. Washing the leaves can remove those spores before the weather conditions are right for them to grow.
« Return to the thread "What happened to my Rose?"
« Return to Roses forum
« Return to the Garden.org homepage
