One of the main points of having an indoor grow room is to control every aspect of your plant's environment. If you don't keep the environment clean, you won't have much control over it. Let's go through why this is important.


It should be obvious that with low hygiene comes greater chances of disease and pests appearing in your grow room. If you keep it clean, it won't be an attractive environment for bugs, spiders, or mites. These can absolutely destroy your plants. And chances are, they'll still be there for your next batch of seeds. They'll survive under the hardest conditions once they've found a home they like. Even if you clean between plants, this won't be enough to keep them out.

Another important consequence of not cleaning your operation is extra maintenance. Allowing dust to accumulate on surfaces and water to form puddles on the floor will not serve you. You'll simply be faced with ruined ventilation systems and rotting flooring material. It's worth the effort, even if just for the money you save. Not to mention how much your plants will thank you.


Even if you're taking products directly out of the box, it's still important to make sure everything is clean and sterile before you place your plants inside the grow room. Bleach is a good option, but don't overdo it. A teaspoon or so for every three litres of water will be plenty. There are even some organic bleach products that you may prefer. Use this on the surfaces of your tent/room and your vents. The last thing you want is the ventilation system releasing impurities onto your plants. Once this is done, let it dry before bringing your plants into the room.

If you're switching from one grow to the next, make sure to also wash your pots and materials. You don't want organic matter to be left behind and develop into fungi in your new grow.

Once that's done, you'll be ready for welcoming your plants into the room. Make sure you're clean when you enter as well. We're not saying you need to shower every time you go in, but it surely wouldn't hurt. At least change your clothes and cover your shoes. You can always just wear clean socks.

This will be the first step to keeping your operation as clean as possible. Which leads us to our next section.

Clean Fan Ventilation System


One of the first things you should be on the lookout for is dead plant matter. Whether on the floor or still attached to the plant, if you see a dead leaf, remove it, and throw it out. The decomposition of this will always attract unwanted guests. Another way you can help prevent this is by pruning. Besides helping your plant focus its nutrients on the good stuff, pruning will remove the problem before any damage is done.

And don't store any organic dead matter inside. Always take it out and throw it away. If you don't remove it from the room, it would be as if you had done nothing. Also, clean your under-trays frequently. If you're not using them, get some. They help keep everything clean and dry.

Keep your water supply clean. This is many times overlooked with the absurd notion that water doesn't get dirty. It does. In the same way you must wash your bathtub every once in a while, you have to wash your water tank and pipes. Sanitise all surfaces your water comes into contact with. You'll be directly feeding this to your plants, so you need to be sure of what's in it.

Buy intake filters. These will help filter the air that comes into your grow room. It will be another step to prevent unwanted pests from entering your facilities through the ventilation system, which they very commonly do.

Another aspect that is too many times forgotten is maintaining clean bulbs and reflectors. These objects sit still throughout the entire process. They will accumulate dust very easily. Make sure you remove these once every month or so and clean them thoroughly.

Cleaning Bulbs And Reflectors Growroom Cannabis


A deep cleaning by sweeping and using a vacuum cleaner provides a good scrub of your grow room, assuming you carefully remove all the debris, leaves and anything visible from the floor, the walls and the devices in the growing space. This way most of the insects’ eggs, microorganisms, and other pathogens should disappear from your room, but not all of them. A complete removal of all microbial life, including fungi, bacteria, spores, viruses and any other pathogens requires a sterilization process, which usually calls for chemical cleaners. A regular sterilization practice is particularly recommended for hydroponic systems, planting pots and cloning areas.

Two common chemical sterilizers used in horticulture are bleach and hydrogen peroxide. Both of them can be sprayed all over the growing space with a manual pump sprayer. Be sure to cover all the surfaces and wipe out the excess liquid after a while.


Bleach leaves a residual that should be carefully rinsed with water to avoid a contact with the plants or soil. It could damage some delicate materials, and its fumes can irritate your lungs and eyes, so take care when using this sterilizer.


Hydrogen peroxide works very well against any pathogens, and chemically turns into water and oxygen after exerting its sterilizing effect. This is very convenient for the grower as there is no toxic substance potentially contaminating the plants or the growing medium. You can spray it all around the grow room, and also use it on a rag to sterilize reservoirs, cloning devices, fans, lights, all the components of hydroponic systems, and any other potentially contaminated place or device.

After a deep cleaning, a sterilization practice at the end of every harvest with bleach or hydrogen peroxide is a good insurance no pathogens will proliferate when you start the next crop. Always remember that both bleach and hydrogen peroxide can cause chemical burns. When you use a chemical sterilizer it is always a good idea to protect your lungs and your skin, wearing gloves, masks and goggles.


A final aspect that will help you keep your space spotless is the way you organise it. If you assemble everything properly and neatly, you'll have an easier job cleaning everything.

Keep your pots well-organized and accessible. Everything needs to be reached easily to clean spills and remove dead plant matter. You should also wall-mount as much equipment as you can. Absolutely do this with fans and ventilation systems, but you can do it for tools too. Uncluttered surfaces are far easier to clean and your tools will always be within reach.

The only other thing you'll need is the proper mindset and motivation. Once you believe that your yield's quality will be superior when cared for properly, then you'll take the effort to go that extra step. Good luck with your operation.

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