Climate Control:

Because powdery mildew relies on fairly specific environmental conditions, maintaining a regular climate control schedule is paramount to preventing an initial infection. By using dehumidifiers to keep relative humidity levels low, spores will not receive the environmental cue to germinate. This cue also comes with fluctuating humidity, thus using a system of humidifiers and dehumidifiers to maintain the optimal humidity, despite differences in temperature in and out of the grow room, can prevent mildew from ever becoming a problem. There are a wide variety of climate controllers on the market, many coupled with thermostats and hygrometers, even some with wifi connectivity to send notices when changes occur.