Best Insect Fogger for Indoor Marijuana Plants

Just like any plants, cannabis does not escape the grasp of pests and diseases. Several pest and insects can hinder the growth and development of weed. There are insect and pests that can affect both indoor and outdoor cannabis plants while there are others that are more prevalent in either the outdoor or indoor growth setting. One good example is spider mites, and gnats can destroy an indoor cannabis garden whereas, in an outdoor cannabis garden, they can be put in check by natural predators. By learning of the different pests and diseases that can affect your grow tent, you will be in a position to protect your plants from the damage by unwanted pathogens.

best insect Fogger for cannabis

You can prevent your cannabis plants from getting any infection by taking certain precautions during your gardening. You need to reduce the chances of pests and diseases from getting into your grow tent. This precaution should be in place from the moment you set up your grow area. One of the most common ways for pests and diseases to get into a grow tent through the gardener’s carelessness. Whenever you get a new cannabis strain, it is vital that you first scan it for any bugs and place it in a quarantine section for 5 to 7 days before introducing it to the grow tent. During the quarantine, you should treat the cannabis with a general insecticide that will kill any pathogen that may have been present.

Another way that pathogens get into grow rooms is by attaching themselves on the gardener. To avoid such a scenario, you should avoid getting into a grow tent just after working on the yard or after walking through an outdoor garden. If the pests do not attach themselves onto the gardener, they may get into the grow room through any small opening they find or even through the ventilator system. To prevent such a scenario, use a screen or mesh to cover the ventilation ports and reduce the chances of the insects and pests from getting through. Ensure that any cracks or holes on the walls of the grow room are well-caulked and sealed. Also, it is essential always to keep the grow room clean. Ensure that there are no dead leaves on the floor, standing water or previously used planting containers as they provide breeding places for insects and pests to breed.

Even so, regardless of how careful you are to prevent unwanted pests and insects from getting into your grow room, the chances are that you will have to deal with the problem at some point. You, therefore, need to make use of insecticides and pesticides that can control the situation. However, the market contains too many pesticides that are very difficult to identify the toxic from the non-toxic. We have made a list of some of the safest and most effective insect foggers you can use to keep bugs away from your cannabis plants.

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The Best Insect Foggers For Cannabis Reviews

Supreme Growers SMITE Spider Mite Killer, All Natural Pesticide Concentrate

While it is vital to get rid of any pesticides that are affecting your cannabis, you should consider your health safety. The Supreme Growers SMITE Spider Mite Killer is a 100 percent natural pesticide that is safe to use on your weed on all the stages of growth. It contains a concentrated natural formula that comes with a variety of different plant oils with the ability to kill an infestation of spider mite eggs as well as adults. Some of the plant oils that give smite its ability to get rid of mites come from peppermint, geranium, rosemary oils and cottonseed. The oils are harvested through cold-press methods to retain purity. They are all food grade, and they target specific modes of action. The formula is powerful and effective in both completely wiping out the pests and preventive control. Whenever there are warm conditions, the pesticide disintegrates completely and leaving little to no residue behind. Avoid using the SPIDER MITE FOGGER under very bright lighting from your grow lights since that may lead to the plants burning. Additionally, always remember to dilute the concentrate with water before using it.

Black Flag 190255 Fogging Insecticide

The Black Flag 190255 Fogging Insecticide is widely known for its ability to control insects. The insecticide is a synthetic pyrethroid, meaning it is safe for using since it consists of natural components. The fogger kills and repels mosquitoes and other bugs such as gnats, flies, biting flies, wasps, biting midges, hornets and other flying insects. It can last for up to 6 hours. Professionals prefer it due to its effectiveness. The insecticide does not require mixing since it comes while ready for use. It does not have any offensive odor. The secret to its success lies in the microscopic particles it produces. The particles are seven times more delicate than mist and can fog float and penetrate all the hidden crevices that pests can hide. It takes less than five minutes to treat an area before the fog dissipates. The insecticide is made of use explicitly by the Black Flag and Burgess foggers. However, it can still work with any other fogger, provided it is a thermal fogger. You can use it to protect your outdoor marijuana garden from bugs as it dissolves quickly without leaving any residue on the leaves.

Pyrethrum TR 2 oz (1 Count) Prescription Treatment Micro Total Release Insecticide

If you are looking for an indoor insecticide that can get rid of all you unwanted insect guests, you should consider getting the Pyrethrum TR 2 oz (1 Count) Prescription Treatment Micro Total Release Insecticide. The insecticide has been in use for years, and it helps in getting rid of fungus gnats, aphids, whitefly, and mites. It helps to reduce costs since there is no need of expensive fogging equipment or any chemical mixing and clean up to follow. The Pyrethrum TR Total Release can provide a coverage of up to 3000 square feet. You can use it in your indoor marijuana garden to protect the leaves and bulbs. The insecticide is one of the safest you can find in the market and is preferred for use when preventing and curing an insect invasion. It contains a slightly tolerable odor. Whenever you intend to use a fogger, it is best if you place in in the middle of the grow room, activate the SPIDERMITE BOMB and leave. You should adequately ventilate your grow-room after using the PYRETHRUM FOGGER to prevent your cannabis plants from drying or even dying. It does not leave behind any residue on the leaves or any other part of the plant.

Doktor Doom Total Release Fogger

The Doktor Doom Total Release Fogger is a favorite among many indoor cannabis growers. It helps to fight fungus gnats, thrips, whiteflies, mealy bugs, aphids, two-spotted spider mites, and mites. You should spray the insecticide directly onto the plant or the area with an infestation to eliminate and keep the insects away. It is made from natural components making it safe to use.

Moreover, it breaks down very fast and does not leave behind any residue, odor or scent. Since it is made up of natural ingredients, it is highly unlikely for it to cause any allergic reactions. The insecticide can cover an area of 5500 cubic feet and can be set to release the entire contents of the container. Even though it is a pyrethrin insecticide, made from natural ingredients, it contains a higher concentration of pyrethrin when you compare it to all the other products in the market, and this can cause a problem to the plants by damaging the buds and leaves when used a lot. It is therefore essential to only use the fogger only when it is necessary.

Trifecta Crop Control – All-in-One Pesticide, Fungicide, and Miticide

The Trifecta Crop Control is a not- toxic pesticide made from food grade essential oils that are blended with a nano-saponified emulsifier. Currently, the Trifecta crop control already has approval for use on cannabis in several states. The Trifecta Crop Control contains a unique blend of high quality essential oils that include thyme oil, peppermint oil, garlic oil, and cloves oil all broken down to small Nano-particles to increase the coverage area. It provides a natural solution to dealing with powdery mildew, molds, and mites. The formula is highly concentrated and requires you to mix it with water before spraying. It helps to prevent and cure cannabis of mildew, molds, and mites up to one week before harvesting. The all in one pesticide, fungicide and miticide is safe for use and does not require a rinse or leave behind any residue. It does not contain any chemicals and is 100 percent biodegradable. When applying preventive measure, you should spray the Trifecta Crop Control at half strength once or twice in a week. If you are controlling an infestation, you need to use 2 ounces of the Trifecta Crop Control for every gallon of water.

General Hydroponics GH2045 AzaMax

Azamax is another natural insecticide, miticide, and nematicide by General Hydroponics that comes from Neemazal, a pure form of azadirachtin. The company extracts the azadirachtin from neem seed kernels by using a patented extraction technology. The compound is toxic to more than 200 insect species and is highly effective against insects, pests, and fungi that affect cannabis plants. It helps to prevent the build-up of insect resistance and the resurgence of pests. It targets pests and insects in the different stages of cannabis growth. The insecticide does not contain any harsh chemical solvents and instead comprises of food grade ingredients. It is OMRI listed and has a license in all the 50 states.  It has excellent results in areas with a warmer climate.  To attain the best results, mix a tablespoon of the insecticide with a gallon of water.

BioAdvanced 701285B 3-in-1 Insect Disease & Mite Control Concentrate

If you are looking for and insecticide that can provide you with value by killing insects, curing and preventing diseases and by controlling the insects, we recommend getting the BioAdvanced 3-in-1 Insect Disease & Mite Control. It is one of the BEST INSECT FOGGERS that can deliver rainproof protection to your cannabis plants lasting for 30 days, a period that is twice as long as what other brands in the market provide. It does not contain any oils or soaps. It contains three different formulas that have a specific function which includes; controlling insects, controlling diseases and dealing with mites. The insecticide can function in all the stages of cannabis growth.

Common Pests and Diseases that affect Indoor Cannabis



You can quickly identify thrips by track marks that appear on the top of leaves when the larvae are feeding. The adults have wings and have a straw-like color. To treat thrips infestation, you need to address all the whole life cycle of the pest. Get a sticky trap that will capture the flying adult thrips, a foliar insecticide to take care of the larvae in the growing medium and a soil drench to kill any eggs or larvae. You should perform the treatment every few days for some weeks if you want to get rid of the pests completely.

Spider Mites


Spider mites are the most destructive pests you can encounter when growing cannabis indoors. They are highly resilient and reproduce at a rapid rate. One of the most obvious signs that show the presence of the pest in your weed farm is the appearance of yellow and white specks on the leaves. The bits appear due to the mites eating from the underside of the leaves. You can as well identify the pests when you see a webbing that looks like a tightly woven spider web. Spider mites fully enclose cannabis flowers and leaves in their strap whenever they occur. You need to get a miticide that is specifically designed to work on these pests. It is best to use organic miticides rather than chemical miticides as they are safer to use. However, they should address the spider mite eggs which are super sturdy and can withstand most insecticides.  You should apply the treatment for two to five days for at least two weeks so that you can get the new spider mites while they hatch and destroy they preventing them from developing again.

Fungus Gnats


You can quickly identify fungus gnats whenever you see swarms of little black bugs that scatter when you disturb the water or growing medium. The bugs resemble fruit flies although they have a body structure that looks like tiny mosquitoes when you look at them through a magnifying glass. The pests can be irritating as they keep reappearing even after applying the treatment. The best way to deal with them is by combining a sticky trap, a foliar insecticide, and a soil drench to wipe out the fungus gnats completely. It will also help if you allow the top three to four inches of the growing medium to dry out since the fungus gnats require moisture to reproduce and drying out the top inches of the grow medium prevents the fungus gnats from reproducing.

Apart from the pests listed above, there are others that affect cannabis in an indoor growing environment. They include aphids, whiteflies, mealybugs, and scales. These insects are not that common, and you can treat them with an array of insecticides. You can find insecticidal soap to address most of them as it offers an excellent cure to these less intrusive bugs.

Frequently Asked Questions

Does pyrethrin get rid of aphids?

Pyrethrin is one of the safest and most effective insects and pest spray’s you can get in the market. It is extracted from a plant and kills aphids on contact. However, it can as well kill beneficial insects such as ladybirds that feed on aphids.

Is it dangerous to use a bug fogger?

You should always ensure to uphold the highest safety standards when using total release foggers. They contain aerosol propellants that can be flammable whenever you misuse them eventually causing a fire or explosion. Additionally, you need to leave the room for a few minutes when fogging. Failure to do say may result in illness.


Indoor cultivation of cannabis is not left out from the effects of pests and insects. The temperature and humidity conditions in indoor grow spaces have an impact on the reproduction of several pests and insects. Whenever a pest or pathogen is present in the grow room, it will most certainly thrive due to the environmental conditions that are present. It is crucial to acquire a suitable insect fogger that can deal with the pesticide or insect present without causing any damage to the plant or the user. We, therefore, insist on choosing organic insecticide over ones with a chemical base. It is essential to keep in mind that the main goal for using an insect fogger is to allow a cannabis plant to thrive, free from pests and diseases and achieve a good harvest of high quality buds. Therefore, we recommend that whenever you use an insecticide, you should use it up to the second week of flowering without spraying the buds. We hope that with the information above you can prevent and control pests in your indoor cannabis garden.

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Bowden draws from over a decade of home growing experience as well as consulting for small-scale and hobbyist-level growers. He has written hundreds of articles, thought pieces, and tutorials about growing cannabis at home

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