Answer: Here are some general rules for control. Start by making sure that your plants are getting enough direct sunlight. (Eight to ten hours a day is generally the minimum for plants that flower or bear fruit.) You'll also want to make sure that there's enough room between plants for air to circulate freely. Overcrowding not only makes plants more susceptible to diseases, if leaves touch other plants, those diseases can easily be spread. Some people report success with this home-made spray: Mix 1 tablespoon of baking soda and 2 1/2 tablespoons of ultra-fine horticultural oil in a gallon of water. Apply as a spray as soon as the mildew appears and every 10-14 days thereafter. Be sure to coat all surfaces.
Q&A Library Searching Tips