A good grow set-up is essential for a good cannabis grow! Here we offer guidance for what you will need to set-up your grow depending on your space and goals. We provide our recommendations for the best grow tents, ventilation equipment and climate control accessories for your indoor cannabis grow.
Grow Tents & Spaces
Grow tents allow you to control the climate and light that your plants experience. They also provide a reflective interior to help maximize the efficient use of light.
The size of your tent depends on the space you have available, the grow lights that you plan to use, and your harvest goals. We give you a rough idea of what you can expect from each size tent.
3x3 Grow Tent
Be aware of vertical height! Tents smaller than 3x3 are often very difficult to grow in effectively because they are too short! Grow lights must be kept a certain distance from the plants and you need room for pots. We recommend a tent that is at least 5 feet tall.
4x4 Grow Tent
Both Dr. Photon and I use 4x4 tents. I use the Apollo Horticulture Grow tent that is pictured and linked in the US Amazon. In all marketplaces we carefully selected the best grow tents for quality and price.
Create Your Own Grow Space
If you do not want to get a grow tent, then there are a few products that you can use to help modify your existing space to be reflective and sealed.
Aluminum Foil Tape
In a ventilated grow space, the exhaust system is one of the most critical components.
The exhaust system that you need will depend on the size of your grow space, the heat generated by your grow lights, and the climate that you are working with.
4" Exhaust Kit
6" Exhaust Kit
If you are running High Intensity Discharge (HID) lights such as HPS or MH, you may need a more powerful exhaust to help control the heat that the lights create.
The best type of exhaust fans are centrifugal or mixed flow, which can handle pressurizing a room. Dr. Photon recommends mixed flow for most situations because it has the advantage of moving more air.
6" Mixed Flow Fan
Carbon filters attach to the intake end of your exhaust system (inside the grow space). The exhaust fan pulls air through the filter (and then through the hood of HID lights), and then pushes it out of the grow space.
4" Carbon Filter
Mufflers: Noise Reducers
4" Turn-Key Duct Clamps
Semi Rigid Duct Hose
I use and recommend “Semi-Rigid Flexible ducting”. It has much better airflow than other flexible ducting, which improves the efficiency of your fans. It is easy to shape into any position and it holds its shape.
4" Semi Rigid Ducting
Using active intake is the best way to control the climate inside your grow space. If you use a good exhaust fan without an active intake fan, the exhaust fan will practically cause the tent to implode. In small grows with little heat or humidity to manage, you may be able to do without and use passive air intake.
The goal with active intake is to help balance air pressure, but you always want the exhaust fan to be more powerful than the intake. You want to avoid the cheaper inline fans that will not work against any resistance. You also want to avoid high powered fans that would eliminate the negative air pressure in the tent.
6" Duct Booster Fans
One-Gallon Fabric Pots
Thermometers & Hygrometers
In order to control the climate, you first have to know what it is!
Ambient Weather WS-10
Hygrometers with Probe
Be aware, many similar units have a wired probe that only measures temperature. They may appear to measure both temperature and humidity, but they measure humidity at the base station not with the probe. The units that we recommend here all measure both Temperature and Humidity with probes.
Check out our "Measuring Equipment" page for other Thermometer/Hygrometer options!
Inside the grow space it is important to keep the air moving around. You don't want too much wind, which can injure plants, but you need to keep the air moving to maintain optimal conditions for growth and to reduce the chances for pathogens. We recommend using two fans to move the air around in most grow spaces. Consider your budget and your grow space and you can choose among the following options.
Ozerri Brezza Dual Oscillating Fan
6" Clip Fan
I live in a very dry climate, which is perfect during most of the grow because the plants themselves produce a lot of humidity. However, early in the grow when the plants are small I must use a humidifier to create the ideal environment for seedlings and young plants. We recommend ultrasonic humidifiers as they do not use heat to create humidity, but Instead atomize water through ultrasonic vibrations. The absence of heat is important so that it does not interfere with the grow room's natural balance and create more problems than it tries to solve.
Large Ultrasonic Humidifier
Small Ultrasonic Humidifier
Most growers can control humidity by leaving the exhaust running. Dehumidifiers are needed only in sealed rooms, or climates with very high humidity. Dehumidifiers can be helpful for grow rooms where high humidity is a problem, however, a problem with dehumidifiers is that they create heat. We do not recommend simply exhausting the hot air because doing so also removes the dry air and defeats the purpose. In hot and humid areas, you may need to seal the grow space (limit air exchange through exhaust) and use a double vented air conditioner along side a dehumidifier.
Air conditioners are very useful when exhaust systems can no longer control heat. You can get AC units that are single or double vented. Single vented units are fine for most set-ups when you are not using a dehumidifier.
Single Vented Portable A/C
Double Vented Portable Air Conditioner
The Whynter Dual Vent Air Conditioner is an excellent choice for a dual vent AC. We are researching the best options from the UK.
If it is too cold in your grow space, you may need to add a heater. We do not recommend using fan heaters, or any heating system that can create a fire risk if something were to happen. Oil heaters are the best option for heating as they distribute their heat safely without getting overly hot on the surface.
Delonghi Oil Heater
Dual Systems Controller
Inkbird Itc-308 Digital Temperature Controller
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About Our Product Recommendations
At Coco for Cannabis, our mission is to help growers maximize the success of their cannabis crops by providing scientifically accurate information and sharing proven growing practices.
The products that we recommend are the actual products that we chose to purchase and use ourselves. In a few cases, we recommend products that we would buy if we needed them. We do not accept advertising and will not recommend any product that we would not buy for ourselves. We offer this guide as a resource to growers.
We may receive a referral when you purchase products through this page. This is the main revenue stream that keeps Coco for Cannabis up and running! When you click through our links and make purchases you are supporting our work! As an Amazon Associate, we earn from qualifying purchases.
Whether we receive a referral does not influence our recommendations. For example, when products are cheaper to buy locally, we’ll tell you that rather than just recommend a more expensive online option.
The information on cocoforcannabis.com should not be considered as financial, legal, or medical advice. You are responsible for knowing and following the local laws that pertain to cannabis cultivation, possession, and use. Decisions to grow cannabis should be made in consultation with a lawyer or qualified legal advisor. Decisions to use cannabis should be made in consultation with your doctor or medical professional.