Whiteflies on marijuana plants

Whiteflies tend to conceal themselves under marijuana leaves and they can be just as destructive. They are very small and spread diseases while eating one plant then going on to the next.

They will travel great distances releasing honeydew and spreading plant diseases in large amounts. Whiteflies will feed on the leaves and stems of marijuana plants and are one of the most harmful pests to your plants.

Ways to recognize whiteflies

In order to see if whiteflies are present, just shake the plant. After this, if you notice a flock of something that resembles winged white dust or small white moths flying around, then you have whiteflies.

White flies on cannabis plants

Your marijuana plant will show signs of damage from whiteflies. One of the mains signs is chlorosis deficiency, which is basically yellowing in the leaves. The leaves will start to dry up beginning around the edges, then falling off. The growth of the plant will also start to reduce and degenerate.

Not sure if whiteflies are causing the damage to your marijuana plants? Check the article Marijuana pest and bug control for a list with pictures of all pests and bugs.

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    How To Get Rid Of Whiteflies

    Whiteflies are resistant to pesticides, so they are a terrible enemy. They always show up like a mob which makes it difficult to deal with them. The right way to control them is to take preventative measures.

    Stop whiteflies on marijuana plants
    Stop whiteflies on marijuana plants

    Companion planting is an excellent, natural way to stop whitefly attacks. Planting zinnia inside your plants along with the aforementioned marigolds will push them out of your yard and onto someone else’s.

    Zinnias appeal to natural whitefly predators when they are a part of your garden. They gain the attention of hummingbirds, predatory wasps and flies, who like to prey on whiteflies. Hummingbird bush, bee balm, and pineapple sage are some examples of mint scented plants that hide the smell of any nearby plants that whiteflies are attracted to.

    Also read The best companion plants for cannabis

    It for any reason that doesn’t work there are still other options. Try misting your plant with a garlic oil solution, similar to what is used on aphids. A commercial product like Bug Blaster will always to the job. If you want to make sure to kill them all buy something like Bug Blaster.

    One more natural option you can try is making an oil spray by combining two tablespoons vegetable oil with one-gallon water. Pour this solution into a spray bottle and mist your plants really well, giving special focus to the areas under the leaves. Do this two times a week until they are gone. Your nearby gardening center should have sprays for removing white flies.

    Marijuana plant symptoms

    • White spots under the leaves
    • Slow plant growth and deterioration
    • Yellowing on leaves
    • Edges of leaves are dry
    • Leaves become brittle and fall off

    If there were ever a pest that was not your plants friend, the whitefly is definitely the one. You will want to check underneath the leaves of your plant and shake it frequently to ensure these are nowhere in sight. If you see a gang of these, get rid of them immediately.

    Plants with strong genetics are less vulnerable to pests and diseases. Make sure to buy high-quality marijuana seeds from a trusted seed bank.

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    FAQs about whiteflies on weed

    What are some common signs of whiteflies on marijuana plants?

    Your cannabis plants have most likely been infested with whiteflies if you notice white spots under the leaves, slow plant growth and deterioration, and yellowing or brittle leaves.

    How can you get rid of whiteflies on cannabis?

    You can try companion planting or misting your plant with a garlic oil or vegetable oil solution for two weeks. We also have Marijuana Plant Protector in our shop which offers enough plant protection system supplies for up to 20 plants.

    Have you dealt with whiteflies while growing your marijuana plants? Please share your experience in the comments!

    Happy growing!


    Avatar for Robert Bergman

    Robert Bergman

    Robert Bergman is an Amsterdam-based marijuana grow expert who has years of experience from small grows to massive operations. His passion for growing led him to develop his own Gold Leaf strain. Now, Robert is dedicated to sharing his knowledge with the world.... [Read full bio]


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    • Grow With My Quick Start Guide
    • Discover Secrets To Big Yields
    • Avoid Common Grow Mistakes