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Best humidifier for grow tent

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Everyone has a hobby that keeps them sane. From arts & crafts to workout maniacs. We all have somethings we do to escape the mundane life and live truly in the moment. One personal favorite of ours is gardening. Looking after plants, being proud of their growth, it all brings so much joy to us.

Editor's Pick


Homasy 4.5L Cool Mist

☞ Weight: 3.5 pounds
☞ Dimensions: 9.09 x 7.56 x 12.8 inches
☞ Batteries Required: No

But like all good things, plants require a lot of care. Fellow gardeners must be aware of how crucial it is to maintain the right temperature for indoor plants. Considering this we compiled a list of the best 8 humidifiers. So, you could easily choose one for your plant buddies and let go of all your worries.

Buyer’s Guide for Best Humidifier for Grow Room and Tent

Before examining the list, we humbly request you to go through this guide, so that you can further narrow down your selection according to your respective need.

  • The area coverage

Area coverage is how much area your humidifier can cover. It depends on two factors: 1) Humidifying-rate: It’s the rate at which it humidifies, 2) The run-time of the device: It’s how long the device can run. Different models have different variations.

In the case of a small area, it is best to consider the one that can cover 100 square feet, similarly, for a larger area (for example rooms, large tents) it’s best to go with the one that covers 600 square feet or more.

  • The size of the water tank

Every humidifier is equipped with a water tank since it has an imperative part to play in the machines working. Now the important thing is the size of the humidifier. The size will decide: After what duration do you have to refill the water tank. For example, a 1-gallon tank would require replacement after every 12 to 16 hours. There are others with more capacity like a 2-gallon water tank that requires less frequent filling.

  • The humidity settings

The amount humidification the device can do in an hour is called humidity settings, it is also sometimes referred to as misting settings. If you want swifter humidification you should consider the one with a high setting such as 300 ml/hr. For slower humidification or in case of smaller rooms you should consider a humidifier with a smaller setting

  • The safety features

To avoid over humidification, some electronic humidifiers come with certain safety features such as automatic shutdown or timer shutdown. Automatic humidifiers detect the level of humidity in the room and shut down after the required level is met. Timer humidifier shuts down after a certain period, which is entered by the user. You may find both features in the same humidifiers, or you may even find humidifiers that are programmable, giving the most decisive control to the user.

  • Noise Level

Humidifiers can be noisy. Therefore, depending on where you want to place your humidifiers, such as in the living area or bedroom for home plants, you might want to consider the one which does not produce a lot of noise.

  • Filter Replacement

The majority, but not all, make use of filters. Filters need to be replaced after some time, though the time duration varies from model to model. Some require weekly changes; others may require you to change after a year or so.

Although, it is not compulsory, however washing your filter may prolong its usage duration. The one thing that you should consider is the cost of replacement and frequency at which you might need to replace it while selecting the humidifier.

  • Cleaning

You will need to clean your humidifier from time to time, to avoid mold particles from spreading into the concerned area. While selecting your humidifier you will need to choose the one that is easy to dismantle and reassemble because most humidifiers require weekly cleaning.

  • Portability

In case you need to move the humidifiers frequently, it is best to consider the one with wheels or the one with portable water containers.

TOP 8 BEST humidifier for grow tent

Homasy 4.5L Cool Mist☞ Weight: 3.5 pounds
☞ Dimensions: 9.09 x 7.56 x 12.8 inches
☞ Batteries Required: No
4.9/5View Product
Homech Cool Mist Humidifier☞ Weight: 4.29 pounds
☞ Dimensions: 14.5 x 11.3 x 7.5 inches
☞ Batteries Required: No
4.8/5View Product
PureGuardian Ultrasonic☞ Weight: 8.36 pounds
☞ Dimensions: 17.9 x 9.37 x 11.4 inches
☞ Batteries Required: No
4.6/5View Product
Honeywell HCM350W☞ Weight: 8.36 pounds
☞ Dimensions: 17.9 x 9.37 x 11.4 inches
☞ Batteries Required: No
4.8/5View Product
Pure Enrichment MistAire☞ Weight: 1.75 pounds
☞ Dimensions: 8 x 6 x 9 inches
☞ Batteries Required: No
4.8/5View Product
Venta LW25 Airwasher 2-in-1☞ Weight: 8.5 pounds
☞ Dimensions: 11.8 x 13 x 11.8 inches
☞ Batteries Required: No
4.7/5View Product
ONSON 2019 Humidifier☞ Weight: 1.75 pounds
☞ Dimensions: 13.6 x 8.7 x 8.7 inches
☞ Batteries Required: No
4.7/5View Product
Everlasting Comfort☞ Weight: 4.19 pounds
☞ Dimensions: 11 x 7 x 13 inches
☞ Batteries Required: No
4.6/5View Product

1. Homasy 4.5L Cool Mist – best humidifier for grow tent

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For indoor trees, Homasy 4.5L Cool Mist is the best decision. It can cover up an area of 538 square feet, and it has a humidify rate of 280 ml/hr. It has a total of three mist mode and it has oil fragrance to fragrant the room. There is also a power-saving feature called the night mode which can be turned on by simply pressing the touch button for 3 seconds. Afterward, it will automatically turn in to sleep mode. It maintains the moisture level between 40-60 percent.


  • 4.5-liter tank is easy to fill
  • Saves energy with night mode.
  • Can function for 30 hours.


  • Airflow is only in upwards direction.

2. Homech Cool Mist Humidifier – top-choice grow tent humidifier

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Homech Cool Mist Humidifier is packed with multiple features, it has a 360-degree spray coverage and has a humidity rate of 300ml/hr. It can cover an area of 215 to 430 square feet. It can efficiently function for 12 to 60 hours. Furthermore, it has a 92mm wide opening which allows for easy cleaning and refilling. It also has an auto switch-off feature, in case the water tank is empty, so that it does not waste power. It also has an anti-mold operation, after the mist guide tube is completely drained, it rotates for 90 seconds to keep the pipe dry and fungus free.


  • Great capacity and coverage area
    Silent and energy-efficient
    Lightweight and easy to manage.


  • Usage of essential oils is not allowed.

3. PureGuardian Ultrasonic humidifier for 4×4 grow tent

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If you have a large space to cover than PureGuardian Ultrasonic Cool Mist Humidifier is the best choice in the market. It supports a 1-gallon water tank which can last up to 70 hours. It is a filter-free humidifier; therefore, the running costs are pretty low. Furthermore, it functions silently and it weighs on 3.6 pounds.
This humidifier has a spare optional aromatherapy tray. So, some of the essential oil drops can be added to create a moderate atmosphere. It releases a cool mist and contains a low water indicator that notifies you when to refill it.


  • The mist is very fine.
    Easy to fill.
    Has a lot of capacity; you don’t need to refill as much.


  • Night light is quite bright and may annoy sometimes

4. Honeywell HCM350W – finest humidifier for grow tent

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After weeks of research, we have concluded that Honeywell HCM350W is the best all-rounder humidifier for any budget. With the help of its UV technology, it can deliver 99.99% germ-free air by killing the germs in the water. So, it can also be used as an air freshener when it is not needed as a humidifier. Furthermore, with the help of its evaporative technology that filters the vapor before releasing them into the air. It maintains the ideal humidity level which is 40 to 60 percent while only using 60 WATTS. The only drawback we found was, the 1-gallon water tank requires refilling every 24 hours.


  • Easy refill & maintenance
    Wooden utensils & furniture is not damaged
    Multipurpose: air freshener & humidifier


  • The water tank is small as per usage.
    Frequent maintenance is required.

5. Pure Enrichment MistAire- best budget grow tent humidifier

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Pure Enrichment MistAire is the runner up of our pick, it is a perfect pick for a small area, it can cover up 250 square feet, and it only uses 120V and 50Hz of power. You can easily direct the nozzle that lets you set the direction of it, allowing you to focus on the concerned area, without having to worry about electrical equipment in the opposite direction. The water tank has a carrying capacity of 1.5 liters and it is easy to disassemble and reassemble for refilling. Furthermore, it can silently function for up to 16 hours.


  • It is safe and silent with auto turning off.
    It provides overnight protection with a night light


  • Frequent refilling is required.

6. Venta LW25 Airwasher 2-in-1 – good humidifiers for a 3’x3′ tent

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This humidifier is best suited for a middle-sized space since it can easily cover up a space of 400 square feet, it can clean the air without the use of a filter, thereby cutting the cost of maintenance. It has a water capacity of 4 gallons and this product comes with a 10-year warranty and an automatic shut off. Furthermore, it is equipped with a dual humidifier to counter the white dust problem, which may occur in some other models. From the user’s claim, it is the best humidifier they have ever bought, according to them it is also easy to clean, though it requires weekly cleaning, and it costly for $300 but users claim that price is well justified with the given the quality and features.



  • Silent operation
    Easy maintenance


  • Costly and partially inefficient.

7. ONSON 2019 Humidifier – good humidifier for grow tent

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The most significant feature of this humidifier is its water tank capacity, which is 4.5 liter which can last up to 30 hours. Also, you can set mist levels, which defines the range, if you set low, it will cover a range of 350 square feet, if you go for a high level of mist output it will cover an area of 480 square feet. Furthermore, during working it is silent, maintaining a sound of 30 dB. It is equipped with an automatic timer shutdown feature, which can be set between 1 to 12 hours. Also, reduces achievable dust growth and stain.


  • Perfect for varying room sizes
    Safe, quiet, and efficient while protecting metal surfaces.


  • Not suited for small spaces.

8. Everlasting Comfort – best humidifier for grow tent

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This humidifier’s main feature is its ability to function continuously for up to 50 hours silently. It has a 6-liter water tank, it has a misting rate of 270 ml/hour and covers an area of 400 square feet. Also, it comes with an essential oil fragrance tray. It supports a 360-degree rotating nozzle and also kills germs and bacteria in the water. Moreover, its humidity level is over 43 percent.


  • time with a huge water tank
    Works silently while keeping the air fresh.


  • There are chances of it producing white dust if used with tap water or hard water.


Choosing the right humidifier can be overwhelming and somewhat daunting, markets are overflowing with different humidifiers varying in price, size, and features. A good humidifier makes all the difference in how your plants grow.

In this article, we discussed how a humidifier will benefit you as a gardener and how it will benefit your garden. We then discussed what are some important things you need to consider narrowing down a humidifier that best suits your need. Afterward, we presented to you a list of top ten humidifiers that would suit your need.


  1. When should I use a humidifier for my plants?
    Depending upon the plant, some plants never require humidification, others require frequent humidification. For example, Plants with hairy or velvety leaves, like African violets never should be misted.
  2. Which is the most appropriate size of humidifier for my grow room?
    Thumb rule is: Large rooms will require large humidifiers. It’s best to ask the salesman according to the size of your room to avoid any inconvenience.
  3. Can you use tap water in humidifiers?
    It is better to use distilled water since tap water carries minerals that can create deposits in the humidifier thereby promoting bacterial growth.
  4. Does spraying water increase humidity?
    Yes, they do, however in terms of area and time, they are inefficient. Humidifiers, on the other hand, use a wick like substance to absorb water from a container, which results in increased surface area so that evaporation rate increases.
  5. What is the optimum humidity level for plants?
    Optimum humidity level varies from plant to plant, it is recommended to research your plant’s humidity requirement to ensure productivity.
  6. Is a humidifier essential during winter?
    Yes, since in winter humidity levels can drop by a certain margin depending on the place, certain plants require a 50 to 60 percent humidity level, although it’s best to see if your plant requires such humidity level or not.
  7. Do humidifiers clean the air?
    No, humidifiers do not clean the air, that task is done by air purifiers.

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