Whiteflies On Marijuana Plants

June 5, 2021

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.

Signs of whiteflies 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.

Download my free marijuana grow bible to know more about whiteflies and other cannabis pests.

How To Get Rid Of Whiteflies

Get rid of whiteflies on cannabis plants

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.

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.

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.

Buy Marijuana Seeds

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!


The founder of I Love Growing Marijuana, Robert Bergman, is a marijuana growing expert that enjoys sharing his knowledge with the world. He combines years of experience, ranging from small-scale grows to massive operations, with a passion for growing. His articles include tutorials on growing... [read more]


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  1. By Holly Smith ,11 Nov 2013
    Can I use systemic on my plants?
  2. By chuck ,07 Aug 2014
    What if my plants are starting to bud can I still spray with garlic concoction my smoke won't taste like garlic will it ?
  3. By John ,25 Dec 2014
    Is it safe to consume marijuana from a plant that was heavily infected with white flies? My plant was heavily infected during the blooming period, but I managed to minimize their population drastically after about two-three weeks to a controllable […]Read More
  4. By Symptom Checker – Identify Marijuana Plant Problems ,20 Jul 2015
    […] Whiteflies […]
  5. By Nick ,27 Sep 2015
    Same ques as John... Is it safe to consume marijuana from a plant that was infected with white flies? Or once was infected? I mean they are pest right?...that too who caries sort of viruses u say :)
  6. By latewoodl ,28 Sep 2015
    It was stated above that they spread "plant" diseases. To plants. It depends on how bad the infestation was, and how long it took to eradicate the white flies. If this Marijuana is, or was harvested with eggs, and larvae […]Read More
  7. By Marijuana Pests & Bugs – Control And Identification ,23 Oct 2015
    […] Again, pest management techniques usually start by creating an environment that is inhospitable to the pest itself. The best way to accomplish this is by introducing and encouraging natural predators. For example, planting zinnias or other colorful flowers will […]Read More
  8. By Stop Ants On Marijuana Plants Now! ,01 Dec 2015
    […] most often come to your marijuana plants initially due to the honeydew (waste) from white flies and aphids. This has a unique ecological benefit for both the ants and the aphids or white flies. […]
  9. By 420queen ,07 Dec 2015
    Does anyone know the best way to kill whiteflies on plants that are already budding? Please let me know thank you!
  10. By latewood.ILGM ,09 Dec 2015
    420queen, I like to use yellow sticky trap cards. You can find an insecticidal soap that is not harmful to produce or humans and use that. Might want to give the plant a gentle shower before harvest, and dry with […]Read More
  11. By Kronik801 ,06 Feb 2016
    Im not one for throwing away buds youve been careing for ,gor 4 months or so.But smoking bug poop an eggs an shells of the eggs....wow tough one,.... BUG POOP,AN EGGS,! I tjink i will pass, good luck on that […]Read More
    1. By Michael Petry ,08 Sep 2017
      Surely you can't be serious. Have you not eaten a savory piece of food that fell on the table or floor for that matter? Haven't you ever stuck your tongue in a place that isn't on any map? If you […]Read More
  12. By Kronik801 ,06 Feb 2016
    Thats one of the reasons they inspect it so close,medical has standards that if its infected with bugs an eggs its probably not real healthy to puff on.especially if you already have medical issues.....probably taste like bacon an eggs?????? New […]Read More
  13. By Babu420 ,11 Sep 2016
    This is my second planting season. I grow outdoors in felt pots. First time I had tons of bugs. Caterpillars, mites got to most of 6 plants. Did some research and found that blue dawn (teaspoon), 24 oz water and […]Read More
    1. By Doreen Phillips ,27 Sep 2016
      Live in Spain. What on earth is blue dawn?
      1. By Shannon ,20 Oct 2016
        It's regular dawn brand dish soap. Dawn makes several scents and antibacterial types. You just want " ORIGINAL dawn dish soap".
  14. By Jakko ,01 Oct 2016
    RE: smoking weed with bug poop: I bought a microscope to see when trichomes are ripe. Useful for identifying pests; @ 100x, even, I'm told, broad mites. Unfortunately you can also see dead bugs, bits of random fiber, and little […]Read More
  15. By latewood.ILGM ,03 Oct 2016
    That is the whole point of a H2o2 bath. Make sure you have a big enough reservoir or tub to fill up in order to do this process. I would not apply anything else, personally. :) Happy washing!
  16. By Kizzy ,19 Dec 2019
    Can i harve wi a whit fly problem?
  17. By Steven ,16 Sep 2020
    I am new to growing and I need all the help I can get My buds are dieing from the bottom up. What causes that ?
  18. By Sandy ,12 Nov 2020
    My plants have small white bugs on them what can i do
  19. By Bill ,16 May 2021
    White flies are a pain I am also using sticky house plant traps they are yellow and white flies seem to like this color. I put traps in and after about an hour had caught several on each little sticky […]Read More
  20. By dean ,15 Jul 2021
    Ya there not that bad but they are pain to get rid of i found good solutions if grow in a tent open both doors take a blow dryer blow the adults out spray the eggs the be gone the […]Read More

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