Please, I am desperate for answer as we have no idea what to do anymore. We have been growing in the same space for about 5 years, using the same method, and have proper airflow and ventilation. Really nothing has changed except that we're dealing with powdery mildew. I posted months ago about discovering PM on our flowering plants. We sprayed with Actinovate and did a peroxide was when we trimmed. Everything turned out fine. Now, our plants are in veg and almost ready to go into the grow room and we're seeing the beginning signs of PM. What can we do? We can't turn the lights off to spray with Actinovate (or can we?) and we want to keep it organic. Ideas? Please, we are open to trying anything and I would love to hear everyone's suggestions. Thanks!
I'm wondering if you have to get an air filter for that room and do some ultra thorough cleaning... Fyi though I've never dealt with mold so hopefully when you get the details posted about temps and humidity and possible mold farms next door someone will help you with solutions.
Check your humidity and keep it around 40-45% for flower. Considering the current measures your taking, If your humidity is good then try an air purifier to remove the spores from the air.
Dehumidifiers, more fans, more fans, and deep clean of EVERYTHING with heavy bleach solution. At this point the PM is probably inside the plant tissue, so the dreaded Eagle 20 might be your only route to get rid of it. I personally would toss the plants and clean clean clean, PM is super dangerous to smoke and causes bad growers karma to those who sell it to patients. Bham Sent from my iPhone using Grasscity Forum