Best Small Grow Tent 2×2 or 3×3 Setup (Fan, Filter & Light) to Maximize Yield & Save Costs

Back when I lived in a small apartment, it was obvious I had to use a small grow tent to support my indoor gardening hobby. I searched the market for a small grow tent that is cheap, yet strong enough to last for years.

I've dreaded the idea of killing my plants due to factors I can't control such as rain and the cold temperature outside. I definitely hated the possibility of insects pestering my growing plants. I knew I had to buy a small grow tent to prevent such problems.

When I found the right 2x2 or 3x3 mini grow tent for me, I was able to sustain a growing area in my small space.

So to help you get started on your journey to indoor gardening, I will share the small grow tent that worked for me and other options I was able to explore.

I've tried a couple of small grow tents and found that the best one should have reflective material inside, thick fabric, durable zippers and vents, and a sturdy frame.

In addition, you can enhance the quality of a mini grow tent using perfect grow room accessories light, filter and fan to miximize yield, which I will also reveal in this article.

How Small Is A Small Grow Tent? 

Size varies because it could depend on how many plants you need to grow. Commonly, small grow tents are 2x2, 2x4, 3x3, and 4x4.

Sometimes the space of your growing area is also a factor. For example, it is ideal to grow a plant per square feet.

Usually, indoor gardeners put at least 2 inches between pots or containers to prevent the plants from suffocating.

Remember, the size of your grow tent should be small to fit anywhere in your grow space without cluttering your room too much.

You must also keep in mind that nutrients needed for growth, as well as sufficient light, water, and air, will be shared by the plants inside.

What Is The Purpose Of A Small Grow Tent?

Basically, a small grow tent is an enclosed self-surviving structure that allows gardeners to grow plants indoors.

A micro grow tent enables an indoor gardener to have total control over environmental factors such as light, humidity, and temperature, which are all essential to a plant's development and yields.

Overall, a grow tent should be reflective, waterproof, light-proof, sturdy, and non-toxic. Also, it must be built with observation windows and multiple vents.

Seedling – A small grow tent is the perfect size to separate seedlings from mature plants.

It also drives high germination rates because of its ability to control growing conditions. In this way, you can even put 2 to 3 propagators inside a 2x2 grow tent.

Cloning – It is easier to clone a mother plant than germinating seeds. In fact, it is the easiest way of propagating plants. However, this method still requires a 2x2 or 2x4 grow tent.

Vegging – A 3x3 grow tent with a 400-watt grow light can support 1-4 vegging plants.

Flowering – A 3x3 or 4x4 grow tent enable gardeners to adjust lighting to initiate flowering. You can even fit 4-6 full-sized plants as long as you have 400-watt to 600-watt grow lights.

How Many Plants Can You Keep In A Small Grow Tent? 

Indoor growers can keep a lot of different plants in a small grow tent.

Imagine a greenhouse, but relatively smaller and cheaper.

Likewise, any plant that can fit inside a mini grow tent and requires less space to develop can be grown inside.

It's actually finding the right plant density that your mini grow tent can shelter. For example, one grow light can serve 1 to 8 growing plants.

Hence, too few or too many plants can possibly take longer than needed until you get your desired yields.

Five flowering plants can sometimes cram a 2x2 grow tent. Depending on the size of your plants, a 2x2 grow tent can offer enough space for 4 vegging plants and a 300W LED full spectrum light.

(Note: I'll share the best LED full spectrum light I've discovered later in this post.) 

With the ample space of a 2x2 grow tent, you should be able to easily fit 4 in 2-gallon grow bags.

If you have a small square based, 2 full-sized plants should be able to fully thrive whereas 3 mature plants can be kept in a small rectangular base.

For example, your 2x4 or 3x3 grow tent could have 1-4 plants, but would require at least 250-watt to 400-watt grow lights. On the other hand, a 4x4 tent can house up to four mature plants or 15 small-sized plants.

If you are using the Sea of Green Low-Stress Training system, you must provide sufficient light energy on the top layer of your indoor plants. Thus, it is advisable to follow a density of 1 plant per square foot. 

To guarantee your small-sized plants get the necessary nutrients, air, water, and light, you can follow this practical guideline for SOG LST method:

4x4 grow ten

On the other hand, the Screen of Green Low-Stress Training method involves putting a screen that has multiple openings between the light source and the plant.

As a result, you are providing a horizontal space for your indoor plants to grow. Usually, it takes about 0.25 plant per square foot.

Here’s a practical guideline for ScrOG LST:

  • 1 plant: 2x2 grow tent
  • 2 plants: 2x4 grow tent
  • 4 to 6 plants: 4x4 or 5x5 grow tents
  • 7 to 10 plants: 4x8 or 5x9 grow tents
  • 10 to 15 plants: 5x9 or 8x8 grow tents
  • 16 to 20 plants: 8x8 or 10x10 grow tents

Would the Types and Size of Containers Impact the Effectiveness of My Small Grow Tent? 

Certainly. We all know that the size of pots or grow bags will impact how big plants will grow. Most small grow tents can support 19 to 39 pounds.

Consequently, the maximum number of plants that you can keep in a small grow tent is determined by how many containers you can physically fit in the growing space.

Expert gardeners traditionally use this cheat sheet:

  • 12″: 2 to 3-gallon container
  • 24″: 3 to 5-gallon container
  • 36″: 5 to 7-gallon container
  • 48″: 6 to 10-gallon container
  • 60″: 8 to 10-gallon container

Small Grow Tent - 4 best mini Tents That Fit In Any Closet

As promised, here are our picks for the best 2x2 or 3x3 grow tents for 2019:

1: VIVOSUN Mylar 3x3 Hydroponic Grow Tent 

Specification:

  • Product Dimension: 30 x 18 x 36 inches
  • Item Weight: 12.
  • Capacity: Up to 10 plants in grow pouches or up to eight five-gallon pots.
  • Warranty: 2 years
  • Canvas: Extra-thick Oxford cloth
  • Material: 600D double stitched and tear-proof
  • Frame: metal poles
  • Interior Lining Material: 98% reflective mylar lining
  • Package Includes: tent body, metal poles and connector, filter straps, floor tray, hanging bar

Let's get straight to it-- the VIVOSUN grow tent is light-proof, which means it has the ability to block all light from escaping.

Its interior even has a 98% reflective mylar lining that gives an efficiency boost to lighting set-ups of any power configuration.

When I first encountered this 3x3 grow tent, I was enticed by its extra-thick canvas because its 600D material is double stitched and tear proof. It was definitely perfect for light blocking.

This mini grow tent has strong metal poles and frame, thus ensuring a smooth installation, safe handling, and durability.

It also has a dual-layer ventilation opening, with inner layer seals that tight around a ventilation fan.

Don't you hate it when grow tents come with low-quality zippers? The VIVOSUN grow tent was able to avoid that problem by using heavy-duty SBS metal zippers.

As a result, the easy-access door unzips smoothly, making it comfortable to peek inside through the observation window.

Generally, VIVOSUN's grow tents are easy to install since there are no tools needed. All you have to do is check the components and build up the metal frame.

Afterward, unzip all zipper of the tent and pull up the tent shell on the frame.

Then, pull the bottom of the tent shell to cover the frame base before putting the hanging bar on the top of the frame. Finally, place the extra floor tray in it to keep the small grow tent clean.

When you finally install the sturdy 3x3 grow tent, you'll see that the ducting ports are well placed, with a variety of options depending on your set-up.

There are two 4-inch ports on the top and bottom of the back panel for cables and pipes, an 8-inch port on the top right, and two 6-inch ports on each of the lateral panels.

For the capacity, I used to put 110 pounds or 50 kg of plants distributed across three hangers. That's about 35 pounds or 16kg on each hanger. I also installed a 450-watt LED full spectrum lights and a fan.

Note that a 1000-watt light could burn the plants. This small grow tent is advisable to those who want to veg 6 to 8 plants in 200cc-400cc pots.

Should you have any problems with the product, there's a two-year warranty for your convenience. VIVOSUN is also a powerhouse name when it comes to hydroponics equipment and indoor gardening services.

Recommended Supplies: LED full spectrum grow lights, a 4-inch air carbon filter for odor control, intake fan, indoor thermometer, and hygrometer

Why We Like It?

We love a small grow tent that radiates stability in the long run.

This is evident through VIVOSUN 3x3 grow tent's extra-thick 600D canvas and metal poles.

Additionally, its unique diamond reflective mylar design offers superior indoor growing environments because it can provide 98% grow light reflection.

As a result, you can create consistent temperature and humidity for your growing environment.

This small grow tent has plenty of 6-inch vent holes that can be closed off using the ducting, cables, and fans.

Its zippers don't get stuck because of its heavy-duty material while the floor tray is removable, water-proof, and easy to clean.

VIVOSUN's 3x3 grow tent even comes with an inner tool organizer for convenient storage of growing accessories and tools.

Disadvantages: The drawstrings for the vent holes don't close 100%, so sometimes a little bit of heat and light can crawl out.

2: CoolGrows 2x2 small Indoor Grow Tent Room 

Specification:

  • Product Dimension: 24 x 24 x 48 inches
  • Item Weight: 11.5 pounds
  • Capacity: Up to 16 plants in small pits
  • Warranty: 1 year
  • Canvas: 600D tear-proof and double stitched
  • Material: Heavy duty Oxford cloth
  • Frame: Iron
  • Interior Lining Material: PEVA High Reflective Silver Aluminum Foil
  • Package Includes: tent body, mylar spill tray, metal bars, metal poles, metal connectors, and two nylon hanging straps with plastic buckles

CoolGrows' small indoor mylar hydroponic grow tent also boasts the necessary durability, light-proof, and easy assembly features. Its interior has a 99% reflective mylar lining that blocks all internal light from escaping. The mylar coating also increases the effectiveness of the light set-up.

This small grow tent can stand solidly because of its strong metal bars, metal poles, and metal connectors. It also has a 600D material that is stitched for perfect light blocking and tear proof.

I truly appreciate this CoolGrows 2x2 grow tent's viewing window on the front because it can amplify my plant's energy store by filtering out white light.

In this way, I can check on my plants without actually impacting them and opening the whole tent.

Moreover, the small grow tent is covered in vents. It has duct holes that are about 4 inches in diameter. I've observed these features made it easier to get the fresh air in, the stale air out, and keep the temperature consistent.

Based on experience, a 300-watt LED full spectrum light should suffice. If you have a 600-watt LED light, you have to monitor increasing heat in the grow tent.

I only use a 1000-watt LED light if the grow tent has plenty of cool fresh air for a fan to circulate.

Depending on your plant size, the CoolGrows small grow tent can usually house about 16 plants in small pits.

However, you should only place 1 or 2 if you are keeping a full-grown plant or a flowering plant.

Of course, indoor gardeners adore a small grow tent that is easy to assemble and clean. This unit comes with a water resistant and removable mylar spill tray, which is certainly a great investment for a home garden.

As for the set-up, there's an instructional pamphlet that can guide you. This is another small grow tent with zippers that run smoothly.

This certain model even has privacy flaps over the zippers to ensure no light will leak. This small grow tent will ensure benefits both for novice and expert indoor growers.

Recommended Supplies: Indoor thermometer and hygrometer to monitor humidity and temperature, 2 or 4-inch carbon filter, 300-watt LED grow light, and 4-inch inline extraction fan.

Why We Like It?

With its length, you can grow 8 small plants (clones or early vegging) or three full-sized plants. For indoor growers who use seedlings, the CoolGrows grow tent is perfect for growing indoor plants safely and easily.

My seedlings developed well because of the enclosed environment that gave me full control over lighting and climate.

This small grow tent has a reflective mylar feature and a heavy-duty zipper system, maximizing reflectivity of available light.

The frame is made from powder-coated metal for strength while the exterior used heavy duty Oxford cloth for durability.

CoolGrows Small Indoor Grow Tent

Moreover, the vent and electric cord holes come with two tightening strings and are double walled, which make it harder for insects to come inside the 2x2 grow tent.

Because of this model's high-grade materials, the parts can be mounted with ease. It also won't take up too much space while ensuring your plants are protected from environmental factors such as rain and direct sunshine.

Disadvantages: Sometimes the zipper, which is made of plastic, gets caught on the fabric when zipping and unzipping. The light mounting and top bars need some improving.

There is a small gap on the bottom and top above and below the main zipper on the front door, but this could be solved using duct tape.

Be prepared to spend additional money because there are no extra indoor gardening accessories included in this small grow tent.

3: MELONFARM Mylar Waterproof Hydroponic Grow Tent 36"X20"X63"

Specification:

  • Product Dimension: 36 x 20 x 63 inches
  • Item Weight: 17.95 pounds
  • Capacity: 110 lbs (including indoor gardening accessories) or about 8 to 10 plants.
  • Warranty: 20 months
  • Canvas: Extra thick 600D canvas
  • Frame: metal frame
  • Interior Lining Material: highly reflective and waterproof mylar lining
  • Package Includes: tent body, metal poles and connector, removable floor tray, assembly instruction

For starters, you get 5 huge 15-gallon grow bags, which is a good value for the price. The grow bags hold water well, make the soil stay moist longer, and offer excellent drainage.

The MELONFARM grow tent has a 100% highly reflective waterproof interior. Its diamond patterned mylar lining aims to amplify your indoor equipment such as growing light fixtures.

This feature also enables your small grow tent to increase the intensity of grow lights and retain heat to maintain the right temperature for your plants to thrive.

The extra thick 600D canvas is toxic free, double stitched, and tear proof. The fabric is about ⅛ inch. Reinforced by the metal poles, the thick tent material ensures stability and security. It also prevents odors from leaking out.

What attracted me to buy this small grow tent is its observation window, which makes it easier to peek inside and monitor my growing plants anytime.

This model was built with a large heavy duty zippered door for convenient access and entry.There's even a storage bag to keep my indoor gardening accessories and tools organized.

Furthermore, the sturdy metal frame can handle at least 110 lbs, which is perfect for sheltering plants, grow lights, fans, and carbon filters.

Amazingly, the handles of this small grow tent are sturdy enough to hold 15-gallon grow bags. Depending on the size of your plants, you should be able to safely grow eight to 10 small plants.

The MELONFARM grow tent has a dual-layer ventilation opening, making the inner layer seals tight around a ventilation fan.

For my set-up, I use a portable AC system and run exhaust out of the small grow tent to ensure cold air exchange.

I was able to make a custom mix of perlite, peat, and compost to grow a small garden. In this manner, I was able to propagate both plants and vegetables.

The MELONFARM small grow tent is fast and simple to install. In fact, I didn't use any tools to build it. A professional instructional pamphlet will relay the installation steps.

Aside from a 20-month warranty, MELONFARM offers a 30-day money back guarantee.

Recommended Supplies: thermometer and hygrometer with humidity gauge, 4 to 6-inch carbon filter and fan.

Why We Like It?

Because of its height, you can keep two mature plants that are roughly 4-feet tall from the top of the grow bag.

The MELONFARM grow tent's window is sealed with transparent plastic and covered with removable mylar sheet. The tool bag was created using the same heavy duty material used for the grow tent.

This small grow tent comes with a water-resistant and removable spill tray. Yet, there are security straps to ensure the spill stray remains attached to the frame. The tray is also easy to set up and clean. Finally, its heavy duty SBS zippers don't get stuck.

Disadvantages: The SBS zippers don't get stuck, but sometimes you won't be able to totally zip this small grow tent.

  • Click to see the most recent price on Amazon

  • 4: Gorilla Grow Tent GGTLL22 LTGGT22 2' x 2.5' x 5'7"

    Specification:

    • Product Dimension: 24 x 30 x 67 inches
    • Item Weight: 19 pounds
    • Canvas: 210D
    • Material: Steel
    • Frame: 100% metal interlocking frame
    • Interior Lining Material: reflective material
    • Package Includes: tent body, removable floor liner, metal frames

    Did you know that Gorilla has a reputation for manufacturing professionally designed grow tents both for novice and expert gardeners? It usually designs the thickest and tallest grow tents.

    Their engineers regularly innovate their designs, ensuring safe, reflective, and odor-proof grow tents. Gorilla is even the most trusted brand in the market, which makes its small grow tents rather expensive than the other brands.

    Yet, the quality and service will not disappoint you. When I first got the package, everything is fitted into a carrying bag, which is made out of the same material as the small grow tent.

    Living up to its name, the Gorilla Grow Tent GGTLL22 LTGGT22 Tent is 24 x 30 x 67 inches. It remains a small grow tent, but its height can be increased between 5'7" and 6'7" using adjustable extension poles that are sold separately.

    The small grow tent has a durable canvas, which you can depend on to provide a secure and safe growing environment. 

    It's also designed with solid metal interlocking frame and bug resistant adjustable micro mesh pre-filters.

    What got me keeping this model is its reflective mylar material, as well as the thick, tough, and heavy-duty fabric.

    I'm even able to use a 1200-watt LED grow light that weighs 50lbs. This small grow tent is vented by an 8-inch duct fan straight out of the grow tent's top part.

    But for starters, you can use a 600-watt LED full spectrum grow light. My recommendation would be king plus 600w or VIPARSPECTRA Reflector-Series . 

    This model utilizes a secure, all steel, and interlocking frame. It even includes strong zippers, viewing windows, and tightly reinforced seals.

    This small grow tent drives successful indoor gardening because of its all-metal interlocking poles that serve as a strong and stable growing enclosure.

    Gorilla Lite Line was able to light-proof this model. There's one velcro window at the back and two large ports on the side, which made it more suitable for light air intake.

    There is a double layer of material on the front vertical zipper while there's velcro on the backside at strategic locations to hold the pieces together.

    Gorilla Lite Line grow tents boast being the first ever height adjusting grow tent, which is ideal for beginners and expert indoor gardeners.

    Because of its adjustable height feature, I was able to double my yields despite being on a tight growing budget.

    This specific Gorilla Lite Line grow tent cleverly configured positions for ducting ports. It has large 10″ double cinching ducting ports, which make keeping an idyllic growing environment simple to achieve.

    The large wraparound zippers and doorways provide a 360-degree convenient access. This small grow tent has large windows that offer easy monitoring of my plants without compromising the growing environment. It also features a micro pre-filter that prevents insects from entering the grow tent.

    The tough zippers, broad viewing windows, and strongly reinforced seals of this small grow tent are good indicators that your indoor plants are well-protected.

    Recommended Supplies: indoor thermometer & hygrometer with humidity gauge, adjustable grow light, 4-inch inline fan and carbon filter

    Why We Like It?

    This is the lite version, meaning the material is slightly thicker material than a generic brand. The sturdy skeleton of this small grow tent can hold heavy filters and fans, with each pole about 19mm thick.

    The extra height gives you more space to hang growing equipment.

    There's a little pocket on the inside where you can keep your small indoor gardening equipment like shears.

    The velcro has the capacity to hold the windows around, ensuring superb light tightness. The removable floor liner is waterproof. And of course, the height extension feature gave me more space to grow plants.

    Disadvantages: The main issue I've encountered is that the stitching around the zippers come apart within a couple of weeks. The port openings of this small grow tent are also terribly huge.

    Meanwhile, the windows have the fiber optic effect at the edges. As a result, you can see a very faint glow at the edges of the plastic where it is stitched together.

    Lastly, it is more expensive than the first three small grow tents I've tried.
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  • The Kinds of Grow Lights You Should Use in A Small Grow Tent (2x2 or 3x3)

    When using a small grow tent, heat and UV rays needed for plant growth become scarce. Thus, plant development becomes slower and often results in low yields.

    A word of caution: your small grow tent will need more cooling if you are using a larger lamp. For a small grow tent, it is recommendable to use a single lamp.

    Moreover, there are 3 main kinds of indoor grow lights:

    Fluorescents - Fluorescent grow lights produce a good light spectrum, can be used in a standard lighting socket, don’t use a lot of electricity, inexpensive, and work well for well-trained plants. Unfortunately, they have a smaller yield per watt compared to LED and HID.

    High-Intensity Discharge - HID grow lights are large and are normally used in conjunction with a reflector hood to direct light downward towards the plants. It can get very hot, which will make you use exhaust fans more often.

    LED Grow Lights – LEDs produce less heat, but are more energy efficient. Since your small grow tent has reflective material, the light and heat will be optimized. LED lights also have longer lifespans than HID and fluorescents.

    As a solution, gardeners must use ​full spectrum LED  grow lights that can imitate the sun's natural UV rays.

    Despite using a small grow tent, you can get light and heat at any time of the day.

     Likewise, you must know that the different colors found in LED full spectrum lights are beneficial to every growth stage.

    • Blue lights = vegetative growth
    • Red lights = budding and flowering
    • Orange to white lights = fruiting 

    Preferably, your grow lights must emit at least 50-75 watts per square feet. In my case, I tend to use 2 sets of grow lights. It’s also advisable not to grow more than 8 plants under a single full spectrum grow light.

    To help you visualize what you truly need, the light footprint should be:

    • 150 watts: 2 x 2 inch grow tent
    • 250 watts: 2 x 2 inch grow tent up to 2.5 x 2.5 inch grow tent
    • 400 watts: 3 x 3 inch grow tent up to 3.5 x 3.5 inch grow tent
    • 600 watts: 3.5 x 3.5 inch grow tent up to 4 x 4 inch grow tent
    • 1000 watts: 4 x 4 inch grow tent up to 5 x 5 inch grow tent

    Best LED grow light for 2x2 or 3x3 grow tent 

    I strongly recommend using VIPARSPECTRA UL Certified Reflector-Series 600W LED Grow Light Full Spectrum .

    It was designed to create excellent heat dissipation, which is suitable for vegetative and bloom growth cycles inside a small grow tent.

    Its optimal full spectrum provides plants with everything they desire in the natural sunlight, which is more important.

    This model is 70% cooler than HID lights.

    Furthermore, the VIPARSPECTRA V600 LED Grow Light has a vegetative coverage of 3x3 growing space and a flowering coverage of 2.5 grow tent.

    It has a rated power of 600 watts using just 120 pieces of LED bulbs.

    It can be operated for up to 100,000 hours, and even comes with a 3-year warranty.

    The Right Carbon Filter I Can Use for My Small Grow Tent

    Carbon filters work very well for air movement and keeping foul odor at bay. In fact, a carbon filter is specifically designed to remove harmful gases and strong odors in a small grow tent.

    Basically, carbon filters become more effective in filtering the air inside a small grow tent if they use more carbon. The high quality activated charcoal in a carbon filter removes the lousy odor from the air itself.

    The outbound air from your small grow tent passes through a thick pad filled with activated charcoal or carbon.

    This allows the carbon filter to use chemical absorption to remove the strong smell from the ventilated air. The molecules carrying the odor are trapped inside the pores of the carbon molecules.

    Carbon filters manufactured by Phresh Filters, IPower, and VIVOSUN have worked best for most small grow tents. I also buy carbon filters that can cover 20% more than the CFM (cubic feet per minute) I actually need.

    Your carbon filter should be able to cover the whole area of your small grow tent. If you buy an expensive and high quality carbon filter, it can normally run for up to two years.

    To give you an idea, you must calculate the volume of your grow area first. You can get this by multiplying the length, width, and height.

    Afterward, divide the volume by three. The result should then be the minimum advisable CFM for your space.

    For example, a 4 x 4 x 6.5 grow tent = 104 cubic feet. It should have 104 CFM and a 4-inch carbon filter that is enough to clean odor in a small grow tent.

    However, the carbon filter could reduce your fan's ability to move the air by as much as 30%. Hence, you must need a bigger fan in the small grow tent.

    What Inline Extraction Fan Size Should I Put in My Grow Tent? 

    Ventilation is crucial in a small grow tent, especially since it is an enclosed area. Therefore, your small grow tent must have a system that can regulate the temperature and growing environment.

    I use an oscillating fan in my small grow tent to blow air around the plants while an air excavator helps in blowing old air out of the grow tent.

    Remember not to point the fan directly toward your plants because this can cause windburns.

    Moreover, it's best to use one fan for intake and another for exhaust. In this way, you will be able to run a vent that can bring in fresher air instead of stale air.

    Notice that there is a CFM rating when you buy a fan. It determines how much air it can move in a minute.

    So, for you to identify the tent volume, multiply the 3 numbers of your small grow tent's size. Here's a sample calculation:

    2 x 2 x 4 = 16 cubic feet. Therefore, your 2 x 2 x 4 inch grow tent must have a fan of at least 16 FCM.

    Furthermore, there are three types of fans:

    Centrifugal - The fans indoor growers should definitely use.

    Centrifugal fans are designed for high pressure, like running through filters and ducting. They can be quite expensive, but will last longer than other types.

    Axial - Only meant for blowing air. Axial fans usually perform poorly and will eventually burn out. Based on experience, they aren't meant for applications where there may be some resistance, such as the use of filters or ducting.

    Mixflow - A combination of centrifugal and axial. Cheaper than a centrifugal fan so it could be an alternative.

    Remember, you must get an inline fan if you are using a filter in a small grow tent. Going back to our example, a 16 cubic feet grow tent that has a carbon filter should now have a fan of at least 32 CFM. In this manner, your grow tent should still get more than half of the CFM that your fan can produce.

    Nonetheless, you must remain careful. There has to be fresh air coming in at the same rate that your fan is able to extract air at its rated CFM.

    The actual CFM will be lower in a room with no matching fan to replenish the air. Similarly, the CFM will be determined by how fast the inlets let air in.

    Some indoor growers do not like noisy fans. There are high CFM fans that come with a speed controller, which quietens the fan.

    Lastly, fans aren't always necessary if your small grow tent has an active exhaust and passive intake.

    This set-up will decrease the working efficiency of your fan, but it will still be able to constantly suck air in through the intake.

    On the bright side, it will create a negative pressure environment, ensuring no smell comes out.

    Are Small Grow Tents Smell Proof?

    Since a grow tent is an enclosed space, it has the capacity to keep the smell inside too. For instance, marijuana plants tend to emit a strong odor, but a grow tent will keep the aroma of the cannabis plant inside.

    Odor-neutralizers, air purifiers, and gels can mask the bad smell, but quality carbon filters and the correct size fan can usually handle the smell even better.

    How About Ducting in My Small Grow Tent? 

    Ducting is another vital component in terms of the air ventilation system in your small grow room. Your ducting can serve as an intake and exhaust pipe while spreading heat in a steady state.

    Hence, your small grow tent maintains the temperature while preventing fluctuations.

    It should be made from high-quality aluminum to be able to resist corrosion, fire, and high temperature.

    The ducting should cover the span of your required temperature.

    The length and hose diameter span should depend on your requirements.

    The Best Humidifier and Dehumidifier for My Small Grow Tent 

    As mentioned earlier, one of the advantages of using a small grow tent is being able to control temperature and humidity.

    For indoor gardening, relative humidity is the key to ensuring your plants thrive well. Too high or too low humidity can harm your plants inside a small grow tent.

    Let me remind you that different levels of humidity are needed in various stages of a plant's life.

    Generally, your plants must have 65% to 70% humidity to sustain growth. Nevertheless, you must learn how to use a humidifier or dehumidifier to have better control of your plant's environmental factors.

    For instance, a humidifier increases moisture level, thus creating clean air in a small grow tent.

    It can also prompt faster root development, and therefore increase plant yields. Lastly, a humidifier minimizes the concentration of dust, bacteria, and other irritants.

    On the other hand, a dehumidifier can overpower high levels of humidity that can cause mold, mildew, fungal growth, bud rot, and slow growth.

    I strongly suggest buying a humidifier that has a one-gallon water tank capacity. As for the size, here are some basic calculations you can refer to:

    • Small humidifier = 300 square feet
    • Medium humidifier = 350-500 square feet
    • Large humidifier = 550-1000 square feet

    2 x 2 grow tent = five ounces of moisture per day

    4 x 4 grow tent = 40% relative humidity

    Meanwhile, a dehumidifier will make sure your small grow tent will not have too much moisture that can produce moisture-related problems. As for the size, here are some basic calculations you can refer to:

    • 2 x 2 grow tent = remove at least 4-6 ounces of humidity per day
    • 4 x 4 grow tent = remove at least 250mL of moisture per day

    Should I Use a Heater in My Small Grow Tent?

    Case to case basis. A heater essentially heats up your grow tent when the temperature fluctuates too much.

    If you have no vents, a heater is perfect for maintaining an optimal temperature of about 70-80 degrees Fahrenheit.

    Note that the temperature in a small grow tent should still depend on the growth stage of your plants.

    • Vegetative - 70 to 80 degrees Fahrenheit.
    • Flowering - 65 to 80 degrees Fahrenheit.
    • Clones - 70 to 85 degrees Fahrenheit.

    Typically, your small grow tent must have an average of 10 degrees of difference from daytime and nighttime growing temperature.

    Unfortunately, it can possibly remove all humidity. If possible, buy a heater that has an automatic shut off feature for safety. Reminder, the heater shouldn't be put inside your small grow tent.

    For example, I use a small 1500-watt heater to cover 100 square feet of my growing area. Then I use a fan to circulate the air for more heat.

    The Importance of a Temperature Gauge, Indoor Thermometer, and Hygrometer for My Small Grow Tent

    Using a small grow tent involves monitoring a lot of things, especially the temperature and humidity inside.

    You must be able to set the temperature and humidity depending on the needs of your indoor plants. Monitoring systems such as a hygrometer, thermometer, and temperature gauge can assist you.

    Ideally, you must place your temperature gauge on the level of your plants inside the small grow tent. The temperature at the leaf surface is more crucial than the air temperature.

    You must not put the gauge directly under bright light. A grow tent can accumulate hot spots that are near fans and air vents.

    But to make things less perplexing, you can position thermometers and hygrometers at high specific intervals in your small grow tent. As a result, you get temperature and humidity readings at the canopy, base, and roots.

    If you're lucky, you can even score a hygro-thermometer.

    Conclusion

    When buying a small grow tent, you must consider the different growing factors we've tackled above.

    If you're after a small grow tent that is cheap, waterproof, light-proof, durable, and easy to assemble, you absolutely must go for the VIVOSUN 30 x 18 x 36 inches Mylar Hydroponic Grow Tent with Observation Window and Floor Tray for Indoor Plant Growing.

    If you want the best 2x2 grow tent, look no further because CoolGrows 2x2x4 Feet Small Indoor Mylar Hydroponics Grow Tent is your best bet!

    If you want a guaranteed 100% reflective material small grow tent, MELONFARM 36"X20"X63" Mylar Waterproof Hydroponic Grow Tent with Removable Floor Tray for Indoor Seedling Plant Growing can be your best buddy.

    If you want a reputable and trusted brand for small grow tents that even offers adjustable extension poles, you can never go wrong with the Gorilla Grow Tent GGTLL22 LTGGT22 Tent.

    I had to do some trial and error to be able to share this detailed post for you. So, do not be afraid to try. Remember my tips and the products I've discussed to help you decide and improve your indoor gardening productivity.

    Lastly, an efficient small grow tent set up doesn’t necessarily mean that you need to purchase expensive equipment. All it takes is determining how well your chosen small grow tent matches to your growing factors and the plants you are growing.      

    Last Updated on by Lindsey Hyland

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