How to control the smell in grow room?2020 Update

One of the toughest parts of growing indoors is grow room odor control. If you are in a situation where the smell of your flower doesn’t concern you, you are in the minority, and should consider yourself lucky!

For the rest of us, controlling odor is an ongoing battle.

Cannabis plants that are in their vegetative stage sustain a very low scent because they haven’t produced terpenes– the molecules responsible for the aromatic properties of a marijuana plant.

A weed plant will develop trichomes when it transitions to the blooming phase and starts to produce flowering nodes.

 The trichomes are the molecule factories that create plenty of aromatic compounds. 

For the vast majority of indoor growers, excessive odor can be problematic. There are a few reasons you might not want the smell of your garden getting out of control, including:

• Security - The smell of your plants could compromise your security in a few ways. The last thing you want is to make it painfully obvious you have an indoor grow, regardless of whether your state allows it or not. The hassle of dealing with legalities is just not worth it. Also, alerting your neighbors of your grow could lead to a spike in their curiosity, another no-no.


• Respecting your neighbors - Even if you aren't worried about neighbors finding out about your grow, they still shouldn't have to. Us growers generally don't mind the smell of a female plant in the midst of flower, but that's not the case for everyone. Especially if you live in a complex and have other buildings in close proximity to yours, you will want to keep your grow on the down low.


• Excess odor can be indicative of poor ventilation - Generally, excess odor can be a clue that something is off with your environment. This could be poor air circulation, improper ventilation setup, or excess heat. If you can smell your plants more than normal, you should probably investigate the issue and fix it.

In as much as cannabis odor is part of what makes the crop stand out from the rest, too much odor in the grow room is not as pleasing. Controlling the marijuana grow room environment is one of the best ways of ensuring that your crops do not emit any odor, which may compromise your safety and security. Crops also grow better in an environment that is perfect in every way, including fresh and odorless clean air. There are many ways to control odor in your grow room and below, are some of the most effective ways.

Fit Air And Surface Purifiers

People growing weed for commercial purposes have the biggest hassle in managing marijuana odor control in their grow rooms. One of the reasons for this is the number of crops in the grow room is larger than that of a non-commercial grow room. The best solution for commercial growing spaces is the installation of air and surface purifiers because they come in sizes large enough for bigger grow rooms.

The purifiers remove all airborne particles in the grow room, leaving it fresh, with a clean airflow, and more tolerable for both the crops and the grower. Some of the impurities that the purifiers get rid of are mold, pollen, smoke, bacteria, viruses, and dust, among others. An inline fan also is recommended.

 POWERFUL AIR FLOW: Heavy hitting blower, moves air through your target location efficiently for optimal ventilation.
RUNS SMOOTH AND QUIET: Powerful fan puts out only 60 dB noise level.
DURABLE BUILD: Galvanized steel parts come factory painted to resist atmospheric corrosion from humidity. Tight, precise construction eliminates rattling and reduces wear and tear to give the element a long life.
HIGH TECH DESIGN: The aerodynamically designed centrifugal impeller of this unit delivers strong air flow with a disproportionately low sound profile.
VERSATILE APPLICATIONS: Ideal for cooling lighting fixtures or controlling hot and humid conditions in grow tents/rooms. 

Improve Air Circulation

Cannabis plants need adequate air circulation through all their stages of growth. Besides lowering the odor levels, proper air circulation also helps to keep the temperatures in the grow rooms low. Adequate air circulation also helps to recycle any used carbon dioxide out of the grow space leaving only clean air.

Growing cannabis indoors requires the use of grow lights that have varying heat levels. During the different stages of growth, crops need proper ventilation to cope with the heat from the grow lights. Some of the lights come with in-built fans, while others do not have them.

In case you are using grow lights without any inbuilt fans, ensure that you install enough fans depending on the size of the grow space. Fans come in different types and sizes, all with varying air circulation levels. Pair the fans with exhaust fans and air ducts to get clean air that keeps odor away from the room and the crops. If your indoor grow is with a  4x4 grow tent, you also should choose the size which is suitable for this tent.

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Install Dehumidifiers And Air-Conditioners

Another way of controlling odor in the grow room is by managing the room temperature and humidity effectively. The humidity levels of the cannabis crop drop as they grow through different stages. Weed requires less humidity in the flowering phase than it does in the vegetative phase.

If you notice that there are higher temperatures and humidity levels than there should be, you should install air-conditioners and dehumidifiers to help tackle the issue. The gadgets will not only eliminate the odor, but hey will also ensure that the crops grow under the temperatures and humidity levels they require for them to thrive.

Setup A Carbon Filter

Another way of managing odor in a grow room is by installing a carbon filter. A carbon filter is an exhaust with activated charcoal and pores. It helps to trap particles in the air that include mold spores, dust, and hair, among others. Activated carbon filters can manage 90% of weed odor control in a grow room effectively. Carbon filters last long, and they are easy to install and maintain. They are also highly practical and readily available.

• SUPERIOR CARBON QUALITY: Made of high quality activated charcoal, delivering 100% filtered airflow.


• ELIMINATES ODOR AND CHEMICAL IRRITANTS: Protects from chemical irritants and eliminates odors- from pungent indoor grow operations to bathrooms, basements and kitchens. Absorbs odors from pets and smoking as well.


• EFFECTIVE ODOR CONTROL: Eliminate some of the most undesirable odors, pungent smell and particulates from indoor grow tent, hydroponics grow room.


• VERSATILE APPLICATIONS: Item can be used as intake or exhaust filter in a variety of setups including use with 6 inch inline fan and duct fans, intake and exhaust fans, air exchange fans, ventilation ducts, and other accessories.

Use Odor Neutralizing And Absorbing Gels

Cannabis growers will go to any lengths to mask the odor in their grow rooms. Sometimes masking the scent may require emergency solutions such as using absorbing and neutralizing gels. Gels are best for small grow rooms. The gels absorb the aromas from the plants, but they can only do so for a short period.

They also come with their scents that can alter the smell of the buds if left to stay in the room for longer than they should. The length at which you should use an absorbing or neutralizing gel or spray will depend on the size of the product, the size of the grow room, the number of crops, and the levels of humidity and temperature in the growing space.

Use Ozone Generators

Using ozone generators is not a very common practice, but it is just as effective as all the other methods in the industry. The people that use ozone generators are mostly commercial cannabis growers. Just like the carbon filters, ozone generators get rid of all contaminants in the grow room that include mold spores, pests, bacteria, and odor.

The generators work by producing ozone, which reacts with the pollutants to break them down to less harmful molecules through oxidation. In short, the generators use oxygen atoms to get rid of bad smell in a grow room.

Cannabis would be completely different without the distinctive scent that sets it apart from other crops. The odor may be appealing to smokers and growers, but not everyone may join in to feel right about the aroma. The distinctive strong odor could also get you into problems if you are growing the crop in a region with no legalization.

The scent could again mess up relationships between you and your neighbors, especially if they do not believe in the growing and smoking of weed. To keep your sanity, security, and discretion, you need to mask the scent. The above tips will help to manage the odor in the grow room and from your crops. You should also ensure that you have all the ventilation measures in place in your grow room before you venture into indoor cannabis growing.

We hope the above tips will help to guide you in keeping the friendship between you and your neighbor solid by not allowing them to sniff what you are planting