Gray Mold & Brown Mold (Bud Rot) & Marijuana
Gray mold is a very common fungal disease that cannabis growers deal with. (Botrytis) It is able to germinate on plants that have moisture on them, and only when temperatures are in the 55-70 degrees Fahrenheit (13-21 degrees Celsius) range.
Gray mold likes to spread on cannabis plants that have been weakened by pests or damaged from weather. The spores from molds like to hop on clothing from people.
They also travel in the air, rain, and tap water.
The areas on the plants that are not receiving as much light are usually the parts where mold first appears. During the flowering period, gray mold can spread to the flowering stalks and buds and do severe damage to the plants.
Mold can spread throughout seedlings and on seeds on male plants and cause them to die. Mold will begin white in color but will turn to a brown or gray as it progresses.
How To Prevent and Control Marijuana Mold
-Remove dead leaves from the plants
-Keep moisture off the plants when the lights go out
-Keep the humidity in the grow room below 50%
-Keep the temperature in the grow room above 70 degrees Fahrenheit.
-If using CO2, only run it during the daylight hours
-Add a dehumidifier to the room to help keep the moisture level down
-Water the plants during the daytime so they have 4 to 5 hours of time to dry before dark
-Remove the carpet and trash in the room where the spores could be living
-Add an oscillating fan to the grow room so the air circulates and moves through the plants and grow medium
-Wash the walls and ceiling with a bleach solution
-Throw away and remove from the room any dead leaves from the plants
-If growing outdoors, cover the ground around the plants with landscape cloth to prevent the growth of weeds
The following items can help to get rid of mold:
If you see mold in your garden it is imperative to remove it immediately.
Check each bud one by one. If you see mold make sure to cut it off the bud. Wear gloves so it doesn’t spread on your fingers.
Moldy bud can cause problems when smoked and it is any cannabis grower’s responsibility to make sure nobody smokes bud with mold on it.
Marijuana mold can be a real problem for cannabis growers.
To learn all about cannabis diseases and to get instruction on how to grow weed, and how to set up an entire hydroponic garden, go to Click here.