Cannabis Diseases and How to Keep Them at Bay

Cannabis is an extremely resilient plant, however, no plant species is indestructible, and like any other organism, cannabis is not immune to disease. Despite having greater control when you have your crop indoors, diseases can prevail and damage or even kill your grow. There is a plethora of cannabis diseases including leaf septoria, verticillium wilt, damping off…however, in this article we are going to look at the three most common cannabis diseases that threaten your grow, as well as provide some preventative measures to help you keep them at bay.

White Powdery Mildew

Powdery mildew is one of the most notorious threats to cannabis crops. Powdery mildew is a rapidly reproducing fungus that is not hard to identify – with a white-grey powder, powdery mildew becomes visible on the plant surface, and once it has started, spreads very quickly. This common pathogen is a danger to your grow, and if left untreated can ruin your crop. The unwanted guest tends to stem from high humidity, low to no airflow, poor ventilation, and overcrowding of plants (leaf-on-leaf contact). Ensuring your crop has a good airflow with a spacious area in which to mature, as well as clean equipment is essential. Despite the precautionary measures, sometimes powdery mildew endures and can spread across your crop. In order to fight powdery mildew, removing the infected plants is vital to hinder the spread – by either cutting the leaf, bud, or whole plant. However, if the prevention tacks fail you, thankfully at Vitabeam, we have a pesticide-free, chemical-free, and residue-free solution that has proven to eliminate this outsider for good in under a week.

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With VQe Treatment

Bud Rot

Bud rot, also known as gray mold, comes from a fungus called Botrytis and it affects many different plant species, including cannabis. The fungus tends to thrive when temperature and humidity levels are high and spreads rapidly, totally capable of destroying a cannabis crop in a week. Botrytis is  commonly found on plant buds in the late stage of flowering but can also appear on stems, leaves and seeds, and can be identified due to its change in color and texture. Areas infected go brown or grey and become dry, with sometimes fungus developing on the surface of tissues, forming a grey mycelium. Sadly, botrytis is highly contagious and spreads through its gray spores, often transported through air and water. Despite the efforts of trying to ensure prevention, botrytis, may find a way through to develop regardless of your strict methods. If this is the case, growers should cut all the affected parts (using sterilised equipment), destroy the infected parts of the plan (in order to reduce the risk of spreading), clean your equipment and wash your hands, and finally, ventilate your grow keeping humidity levels below 50%. 

Fusarium Wilt

This destructive disease infects vascular tissue, causing it to turn dark brown, wilt, and die. A way of identifying whether your plants are infected is to see if the plant is struggling to grow, as well as wilt even when there is adequate soil moisture. Sadly, once plants have been infected, they should be destroyed to disable the fungi from spreading. 


As we can see from the diseases above, there are preventative measures. However, keeping these diseases away from your crop can be very time consuming and costly. To save you time, money, and your crop, BioRadiance have an affordable and very efficient solution for you. Our unique cocktail of light wavelengths in our BRe3 Wand kills pathogens as well as stimulating photosynthesis. So not only do you keep these nasty diseases away from your crop, you simultaneously boost your plant growth, resulting in more yield and profits. Our pesticide-free, residue-free, and chemical-free solution could be the ultimate saver for your crop…check us out for more information or email us at – we are keen to see how we can help you with your grow!

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