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Powdery Mildew is an issue all cannabis growers want to avoid. Like the name suggests, powdery mildew looks like white powder on the plant, and grows from several different types of fungi. It is particularly difficult to get out of your garden because the fungi can be in your garden without you noticing. The powdery mildew will remain dormant until conditions are perfect for it to grow. Once spores are exposed to the right conditions, they will begin to develop into powdery mildew, and when the conditions are ideal, it can spread through an entire garden very quickly.

Due to the speed that powdery mildew can spread, it is very important to recognize it early in its development, and to react to it quickly. Luckily, it is very easy to spot, due to its white colour on the green leaves. Powdery mildew will usually show up first as a couple of white circular spots on the leaves. If you don't react to it at the initial stage, it can become very difficult to stop. Powdery

mildew will flourish in a humid climate, and prefers a climate without much airflow. Plants that are growing very close together are much more susceptible to having powdery mildew form as well. If it is left un controlled for to long, the powdery mildew will cover entire leaves, severely interfering with photosynthesis. If no action is taken at all, powdery mildew can eventually lead to the cannabis plant dying.









There are a few different options when it comes to treating powdery mildew. If you would like to treat it organically there are several treatment options that will work for you. Milk can be mixed with water at a 2:3 ratio. If you have several plants infected, mix 2 cups of milk with 3 cups of water in a spray bottle and spray it on all plants . Be sure to contact both sides of leaves, stems, branches and the soil, to ensure all spores receive treatment. Neem oil, fish oil or sesame oil can also be used in similar spray methods for treating powdery mildew. Chemical fungicides can also be purchased if you would prefer that method, and they will work well also.









Like most pests in cannabis, the best solution for powdery mildew is to avoid getting it in the first place. Always keep your grow environment at the proper humidity levels , and always have good airflow through your garden . If your garden is consistently experiencing high humidity, you may need to consider investing in a dehumidifier . Remember, plants that are very close together (touching each other) will be much more susceptible to powdery mildew. It is also a good idea to maintain proper pruning techniques to ensure your plant can receive enough air flow through it. Another important tip to avoiding powdery mildew is to avoid watering your plants right before their lights off time.

You should always apply water at least a few hours before lights go off, to allow enough time for water to absorb into the soil properly. Soaking wet soil during the lights off period can cause a lot of moisture within the plant, and can cause powdery mildew to form. Even if you are taking all precautions to avoid powdery mildew, you should still be looking for it during regular scouting sessions of your garden. If it does appear in your garden, your best chance at success is to catch it early!













This article contains affiliate links. If you click one of these links and make a purchase, I will receive a small commission of that purchase, at no extra cost to you. When you choose to use these links, you will help support our website and allow us to continue providing the majority of our content to you and others, for free!