Reasons For White Spots on Cannabis Leaves

YouTube Video: 4 Tips on How To Prevent Powder Mildew In Grow Rooms


If you’re a commercial cannabis grower, you know that keeping your cannabis healthy is vital to the quality and yield of your crop. When spotting potential problems with your plants, there are few things more concerning than white spots on cannabis leaves. But don’t panic! This blog post will cover what these white spots indicate and how you can address them.

Powdery Mildew On Cannabis Leaves

The most common cause of white spots on cannabis leaves is powdery mildew. This fungal disease typically appears as a thin layer of white or gray powder on the surface of leaves or buds. It usually starts in humid or wet conditions, so if your environment isn’t properly regulated, this could be the source of the issue. The good news is that powdery mildew can usually be treated with AirROS surface and air scrubbers, but it’s essential to act quickly before it spreads too far.

Insects That Cause White Spots on Plants

Plant pests such as mealybugs, scale, and aphids are notorious for causing havoc on plants. These pesky critters feed off the sap of foliage until white spots or other discoloration appears. To make matters worse, when these unwelcome guests finish their feast. They leave behind a sticky secretion called honeydew that can attract sooty mold fungus. They transform leaves from vibrant greens to dreary blacks.

Nutrient Deficiencies

Another possible cause for white spots on cannabis leaves is nutrient deficiencies. If your plants are not getting enough essential nutrients like calcium, zinc, iron, and magnesium, they may develop these spots as a symptom of the deficiency. To address this issue, you need to adjust your nutrient regimen by adding more fertilizers and supplements to ensure that your plants have everything they need to stay healthy and strong.

Light Burn

Finally, another possible cause for white spots on cannabis leaves is light burns from too much exposure to intense lighting. This can occur when lights are too close to plants or left on for too long without breaks between cycles. To prevent the light burn from happening again, keep lights at an appropriate distance from plants and give them adequate rest in between cycles so that they don’t get burned out from overexposure.

Preventing White Spots and Fungal Diseases

AirROS commercial surface and air purification system is the solution to stop airborne and surfaces fungal spores. It utilizes ROS (Reactive Oxygen Specie) to kill and prevent white spots such as Powdery Mildew and other types of mildew and fungi. 

White spots on cannabis leaves can be caused by various issues from powdery mildew, nutrient deficiencies, or even light burns. As a commercial grower, it’s important to stay vigilant when spotting potential problems with your crops. It’s vital to address quickly before they become too severe. In addition, by understanding what causes these spots and how to prevent them. You can help ensure that your plants remain healthy and productive for years to come! If you want to prevent Powdery Mildew or other mildew that causes white spots on leaves, then schedule a free consultation or submit a form here to get a quote on an AirROS purification system. 


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