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Mold and blight on your marijuana plants is something you want to avoid. It is something that can be prevented and you will be thankful that you can. Blight can seriously endanger the safety of your plants and leave them feeling blue instead of green

One method of treatment for blight is to use a beneficial strain of bacteria against it. Certain bacteria can actually enrich soil and prevent the spread of plant disease. For example, bacillus subtilis is a naturally-occurring bacterium that fights blight and other fungi. It is easily available online for use in organic marijuana cultivation.

Another simple but effective solution for blight is to apply potassium bicarbonate to the plants. Potassium bicarbonate, like its relative, sodium bicarbonate (baking soda) is an alkaline substance that is toxic to fungi.

Potassium bicarbonate is available from most garden centers. It is a white, powder-like substance. For best effects, mix 3 T. potassium bicarbonate 3 T. oil, and ½ tsp. castile soap in a gallon of water. Apply the solution to plants daily as a treatment for blight or a way to prevent its spread.

Preventing Disease on Your Cannabis Plants

field of cannabis plants, preventing disease on your cannabis plants

The best treatment for blight is to invest in prevention efforts. One easy way to prevent the transfer of fungi or bacteria is to ensure your plants are appropriately spaced. Not only do crowded plants fail to get enough light, but they also become warmer and more moist. This facilitates the growth and spread of blight-causing pathogens.


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In addition to spreading plants apart, it is important to consider air quality in your growing environment. The fans that many marijuana producers use to cool plants from the heat of grow lights can actually spread spores and bacteria throughout the environment. Thus, finding a solution to air quality problems is of paramount importance.

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It is important to check on your plants regularly to get ahead of the problem before it starts. For more tips on growing cannabis and taking care of your plants visit Cannabis Training University.

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