What Does Mildew Look Like On Kibble. Powdery mildew usually covers the upper part of the leaves, but may grow on the undersides as well. What plants do powdery mildew usually grow on?
Mildew is usually a thin dusting of a black, grey, or (rarely) white growth, appearing on fabric, upholstery and occasionally walls. Unlike mold, which can be green or black, mildew remains light until it begins to grow. Its texture can be fuzzy or slimy.