5 Best Humidifiers For Weed

Last updated on Mar 15, 2022 Humidifiers
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Indoor weed growing requires stable relative humidity levels to thrive. If your indoor humidity is fluctuating or low, you risk yielding nothing from your weed. In this regard, when growing marijuana you need to improvise measures of maintaining the required humidity levels. You can use a humidifier to ensure the humidity levels in your weed grow room/tent is sufficient. 

A humidifier is the most effective way of ensuring consistent humidity levels. Most of them have an automatic system, which helps maintain a certain level of humidity.  If you are wondering how you can choose the best humidifier for the weed plants we can guide you.

In this article, we have selected some of the best 5 humidifiers for your weed plants. 

Summary of Our Selected Best Humidifiers for Weed

HumidifierVornado Evap40 4-Gallon Evaporative HumidifierLevoit LV600HH Ultrasonic HumidifierLACIDOLL (2.1Gal/8L) Top Fill Large HumidifierAILINKE 8L Large Ultrasonic Top Fill HumidifierCrane Droplet Ultrasonic Cool Mist Humidifier
Area Coverage1000 ft2753 ft2500 ft2500 ft2250 ft2
Tank Capacity (Liters)156881.9
Max. Running time-60 hours36 hours24 hours15 hours
Humidification modeEvaporativeUltrasonicUltrasonicUltrasonicUltrasonic

Is A Humidifier Good For Weed Plants?

Yes, humidifiers are good for weed plants. You should know that marijuana thrives under humid conditions. However, in most areas especially in urban centers humidity levels are usually low. For this reason, weed plants need a humidifier to increase humidity levels. Humidifiers work by releasing moisture into the dry air, creating a good grow condition for weed. This is why humidifiers are good for plants.

What Humidifier Is Best For Weed Plants?

There are basically two types of humidifiers that are good for weed plants. These are ultrasonic and evaporative humidifiers. Both of them are good and can help you increase humidity levels in your grow tent.  You only have to choose the one that fits your budget and the targeted grow area.  

How Long Does a Humidifier Need To Be On For Plants?

This should be based on the humidity levels in your home. If the humidity levels in your home are fluctuating, you can use the humidifier evenly. For instance, if humidity is low during the day and high during the night, you can use a humidifier during the day and put it off at night.

However, during winter, humidity tends to be less for the whole season. This is because cool air does not hold much moisture just as warm air. Moreover, during winter people use wood and gas stoves to generate heat. This can make the indoor air dry. So, during this period you can use a humidifier for an extended time. 

Where Should I Put My Humidifier In My Grow Room

You can place your humidifier anywhere in the grow room. As long as the humidifier has the capacity to humidify the whole grow room/ tent, location does not matter. However, you should ensure that the unit is not so close to the plants. This would affect the mist output to circulate the whole room.

What Can Be Used In Place Of A Humidifier?

  • Boil Water

In case you do not have a humidifier, you can boil water inside the grow room/tent to increase humidity. When the water reaches boiling point, it starts releasing steam into the air.

  • Use Bowls of Water

You can add water to the bowls and place them in your grow area near air intakes. This water will slowly evaporate, thus adding moisture into the air.

  • Use Water Spray Bottles

You can use spray bottles to increase humidity in your grow room or tent. You only have to spray water on the walls of the tent or room every morning and evening. This will lead to a steady increase in humidity.

What Is the Ideal Humidity to Grow Weed?

The ideal humidity level to grow weed is between 40-75%. According to the Journal of Frontiers in plant science, the ideal humidity level for cannabis plants is 75% during the development stage. The same article reports that during the flowering stage, these plants required between 55-60% humidity. Further, during the later stage of development, weed plants need 40-50%. Therefore, depending on the stage of growth, weed requires between 40-75% humidity levels.

Is Low Humidity Bad For Weed Plants?

Low humidity is bad for weed plants. Cannabis plants need high humidity, especially during the development stages. So, if they are exposed to dry air, they will get wilted leading to slow growth and can even die.

Does Fans Increase Humidity in A Grow Tent

Yes, fans can increase humidity in a grow tent. However, humidity increased by fans only is usually not enough to satisfy the plants. If you want to increase humidity by using a fan in a grow tent, set it at low speed. On low speed, the fan will circulate less air in the tent. Certainly, this will increase the humidity levels.

  5 Best Humidifiers for Weed

1. Vornado Evap40 4-Gallon Evaporative Humidifier

Image showing Vornado-Evap40 Evaporative Humidifier
Vornado Evap40 Humidifier

First on our list, we have Vornado Evap40 4-Gallon evaporative humidifier. This humidifier has been identified among the best due to its features.

The humidifier has the capacity to humidify weed plants in large indoor spaces. It can generate moisture in grow rooms of up to 1000 square feet.

Furthermore, this large capacity humidifier comes with two filters. This allows the humidifier to filter out the water before being released into the air.

Vornado humidifier is easy to control. The control panel allows you to choose your preferred fan speed and humidity level using the humidistat dial.

V0rnado can also detect the current humidity levels in the room. You can set the ideal humidity of your weed plants, and the humidifier will automatically adjust itself.

Vornado Evap humidifier has a 15-liter water tank. This allows the humidifier to release the same amount into the air for 24 hours at a continuous high speed.

Why Vornado Evap40 4-Gallon Evaporative Humidifier Is Good for Weed

  • Wide Area Purification

If you grow weed on a large scale, Vornado can help you maintain suitable humidity. This humidifier can humidify marijuana plants in rooms of up to 1000 square feet.

  • No Need for Full Time Supervision

If you want a humidifier that can humidify your weed without constant supervision, look out for Vornado. With a 15-liter water tank, this humidifier can generate 15 liters of moisture in 24 hours. Therefore, if you are a busy weed grower, this humidifier will ensure stable humidity with just one fill for a day.

  • Automatic Humidity Control

Regulating humidity according to the weed development level might be challenging. However, Vornado can help you maintain the required humidity for your weed. This is because it features a humidistat that automatically measures and controls humidity. You only need to preset the humidity range, and the humidifier will automatically adjust to maintain it.


  • Easy to clean
  • Water filters
  • Easy to control
  • Operates quietly
  • Large water tank
  • Emits fewer minerals in the air


  • Require periodical filter replacement
  • Bulky

2. Levoit LV600HH Ultrasonic Humidifier

Image Showing Levoit LV600HH
Levoit LV600HH

Also, you can humidify your weed plants with the LV600HH hybrid ultrasonic humidifier. This is a warm and cool mist humidifier. You can use it according to your preferences.

This humidifier is good for large weed grow rooms or tents. LV600HH can moist an interior space of up to 753 square feet.

The water tank on this humidifier has a capacity of 6 liters. This allows LV600HH to output 300mL of cool mist per hour. Similarly, it can output 500 ml of warm mist per hour. On a low setting, this humidifier can run for up to 60 hours.

LV600HH can operate automatically. It comes with a built-in humidity sensor and auto mode. These automatically adjust mist output depending on the indoor humidity levels.  

LV600HH also gives you several control methods. You directly adjust the humidifier using the touch control panel. Likewise, you can use remote control.

Why Levoit LV600HH Ultrasonic Humidifier Is Good For Weed

  • Full-time Humidity Control

If you want a humidifier that can regulate humidity levels depending on the growth stage of the weed plant, you can use LV600HH. This humidifier comes with an auto mode feature, which uses the humidity sensor to adjust the unit. You can preset your weed preferred humidity levels, and the humidifier will operate accordingly.

For instance, when humidity reaches the maximum preset level, the humidifier will automatically shut off. It will then resume when the humidity drops to a minimum preset level.

  • Area Coverage

For those with large weed grow tents or rooms, this humidifier might be good for you. LV600HH humidifier can cover an indoor space of up to 753 square feet. This coverage is good for average marijuana grow rooms. In this case, only one humidifier can generate enough moisture for your weed plants in large rooms.

  • Large Tank Capacity

LV600HH humidifier carries a 6-liter water tank. Surely, this allows the humidifier to generate humidity for up to 60 hours on a low setting. This means you will need to frequently be around to refill the water tank for maximum performance. So, with just one refill, your weed plants will sufficiently receive moisture for a long time.

  • Works Throughout the Year

You do not need to stress with changing seasons regarding how you humidify your marijuana. LV600HH humidifier gives you warm and cool mist. Regardless of the temperature in your grow room, your cannabis plants will receive the required humidity.


  • Operates quietly
  • Remote control
  • Easy to clean
  • Aromatherapy
  • Dual mist output
  • 3600 dual nozzle


  • Uses no filers, meaning it can release much whiter dust into the room

3. LACIDOLL (2.1Gal/8L) Top Fill Large Humidifier

Image showing Lacidoll top fill humidifier
Lacidoll top fill humidifier

Another good humidifier for weed is LACIDOLL (2.1Gal/8L) Top Fill Large Humidifier. This is a cool-mist humidifier.

This humidifier is good for grow rooms or tents of up to 500 square feet.

Additionally, Lacidoll carries an 8-liter water tank. This allows the humidifier to output mist of up to 300ml per hour.

This humidifier comes with a 12-hour timer. You can schedule the time you want it to operate in your grow room.

The Lacidoll humidifier is equipped with a humidity sensor. This adjusts the mist output depending on your preset humidity levels. You can preset your preferred humidity levels between 40-90%.

The humidifier comes with an auto shut-off function. This turns off the humidifier when the water tank drains.

Why LACIDOLL (2.1Gal/8L) Top Fill Large Humidifier Is Good For Weed

  • Maintains Stable Humidity

If you want to provide sufficient moisture to your weed plants, you can add a Lacidoll humidifier. The humidifier comes with a built-in humidity sensor. This measures indoor relative humidity. So, you can preset your plant’s preferred humidity level, and the humidifier will accordingly. Therefore, your weed plants will receive enough humidity to support their growth.

  • Large Water Tank

If you are always busy, this humidifier will give you time to do your other duties. Lacidoll has an 8-liter water tank. This is large enough to support the humidifier to generate moisture for some good time. So, marijuana plants will not lack moisture every time you are not around.

  • Good Mist Output per Hour

Lacidoll (2.1Gal/8L) top-fill large humidifier can output 300ml of cool mist per hour. This means if the humidity drops beyond the required level of weed, Lacidoll can restore it quickly. Ultimately, weed plants will not get wilted due to insufficient moisture.


  • Timer
  • Easy to clean and refill
  • Whisper quiet
  • Two control methods
  • Auto shut-off
  • Leak-proof design


  • Produces a bubbling sound on a high setting

4. AILINKE 8L Large Ultrasonic Top Fill Humidifier

Image showing Ailinke 8L top fill humidifier
Ailinke 8L ultrasonic humidifier

You can maintain the required humidity levels for your weed plants with Ailinke humidifier. It is also an ultrasonic cool mist humidifier.

The humidifier is designed for large indoor spaces. Ailinke 8L humidifier can humidify spaces of up to 500 square feet. Generally, this is good for large grow rooms or tents.

Ailinke allows you to customize your preferred humidity between 40-90%. The humidifier comes with a built-in humidistat. This ensures the humidifier works in accordance with the preset humidity levels.

This humidifier is easy to control. You can adjust Ailinke using the sensitive touch panel and a remote.

The humidifier has an automatic shut-off feature. When the water levels in the tank is lower, Ailinke will automatically shut off to prevent related damages.

Ailinke 8L humidifier gives you convenience when using it. If you are busy you can schedule the unit with a 12-hour time.

Why AILINKE 8L Large Ultrasonic Top Fill Humidifier is Good for Weed

  • Maintains Sufficient Humidity Levels

If you want to maintain a suitable humidity level for your weed, you can use Ailinke humidifier. The humidifier comes with a humidistat, which measures the current humidity levels. In this regard, you can preset humidity levels depending on your weed plant growth level. Certainly, the humidifier will maintain the preset levels. Therefore, this will allow your weed plants to grow well.

  • Large Water Tank

When looking for a humidifier that can mist your weed without constant shut-off due to low water, you can get Ailinke. This humidifier has an 8-liter tank capacity. With this capacity, the humidifier can generate moisture for up to 24 hours. This can help maintain stable humidity for your weed plants.

  • Area Coverage

If you have a large indoor weed grow area, checkout for Ailinke 8L humidifier. This humidifier has the capacity to generate moisture in rooms of up to 500 square feet. This means your marijuana plants in such a space will receive the required humidity levels to support their growth.

  • Scheduled Humidification

Ailinke 8L humidifier can help you deal with fluctuating humidity levels. For instance, if your grow area is moist during the day, and dry at night, this humidifier can help you out. You can use the 12-hour timer to schedule when the humidifier should stop operating. For this reason, the humidifier will help maintain good humidity for your cannabis plants, as you save energy.


  • Auto shut-off
  • Whisper quiet
  • Two control methods
  • Easy to clean
  • Energy efficient
  • Aromatherapy


  • It is designed with a long height, which makes it easy to fall off the ground.
  • Generates white dust

5. Crane Droplet Ultrasonic Cool Mist Humidifier

Image showing crane droplet ultrasonic cool mist humidifier
Crane droplet ultrasonic humidifier

If you are growing weed on a small scale, the Crane droplet humidifier can be good for your plants. The humidifier has a coverage capacity of 250 square feet.

Besides, Crane droplet is designed with 3-speed settings. You can adjust from low, medium, and high fan speed to meet your preferred humidity level.

Moreover, the water tank on this humidifier has a capacity of 1.9 liters. This allows the humidifier to generate soothing moisture for up to 15 hours on a low setting.

The Crane droplet humidifier generates less than 30 dB. This means the humidifier is quiet, favoring those with weed-growing tents in the living room.

Why Crane Droplet Ultrasonic Cool Mist Humidifier Is Good for Weed

  • Can Humidify Small and Medium Weed Grow Areas

If you need a humidifier for a small weed grow kit/room, you can get a Crane Droplet humidifier. This humidifier has the capacity to humidify weed plants in an indoor space of up to 250 square feet. Therefore, this is good for weed plants in average grow tents and rooms.

  • Extended Run Time

Crane droplet ultrasonic cool mist humidifier can humidify weed plants for up to 15 hours with one refill. On a low setting, the humidifier can guarantee nonstop humidity for your weed for a long time. This means you only need to refill the humidifier once a day to maintain stable humidity levels.

  • Easy to Adjust

You can adjust your Crane humidifier according to humidity levels in your grow tent. This will make your weed receive enough humidity and not low or excess. This is because you can use low, medium, or high speed to output mist. For instance, when humidity is low, you can set the humidifier to high speed to quickly increase it.


  • Easy to clean
  • Portable
  • Quiet
  • Vapor slot
  • Auto shut-off


  • Has no humidistat, which means you have to get a hygrometer  
  • No timer

In summary, humidifiers are very essential in growing weed. In this regard, you need a good humidifier that can generate suitable moisture depending on the plants’ development stage. Many people usually get stuck when looking for the best humidifiers for weed. So, in this article, we have searched for the best 5 humidifiers for weed to help you make a better choice. 

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