The 7 Best Humidifier for Grow Room: To Grow Your Plants Healthier

Humidifier for Grow Room

There are several reasons one may choose to have a grow room in their house.

You may, for instance, think it adds a bit to your home’s overall aesthetic quality — or you may have more scientific motives.

Whatever the reasoning, you’ve probably heard that proper grow rooms should include a humidifier.

But is that true? If so, why?

Below, we’ll take a closer look as to why purchasing a humidifier for your grow room is a safe investment.

But before digging that in deep, let us know about what a grow room or a grow tent exactly is…

Grow Room vs Grow Tent Difference

Grow rooms or tents are uniquely designed to be suitable for indoor gardening.

If you’re into gardening, chances are that you’ve come across both the terms “grow room” and “grow tent.”

But, how do these places differ, and do they require different levels of humidity?

grow room humidifier

The answer to the first question is a bit more straightforward.

As noted, grow rooms are rooms that are specifically designed for plants growing indoors.

These rooms are made into your home, and they don’t require the use of special outside equipment to make them viable for plant growth.

Grow tents, however, are a bit different. Instead of being made into the fabric of your home, these tents are portable.

Though they are also used to make an indoor growing space for your plants, they aren’t set in stone.

These pre-made tents are designed to be added to a room to turn it into a grow room.

Once they have been used, they can be moved to another room or area if need be.

Humidity for Plants: Why It’s Important?

Your grow room will likely be the most humid room in your house.

And for good reason, you want to make sure that your plants have enough moisture.

Without it, they can dry out and die. Don’t overdo it, though.

Having too much moisture can also cause your plant to suffer, so be sure that you’re providing the right levels of misting to them along with proper moisture.

Believe me, by doing so you can make your at-home grow room a success.

Why You Need a Humidifier for Grow Room?

If you’re looking for your plants to survive, you’re going to need to invest in a humidifier.

A proper humidifier can provide the humidity needed for your plants to thrive.

Because here’s the deal: plants typically suffer or even die when they’re placed in dry environments.

Humidifier for Plants

This means that you’re not going to want to let your grow room get too dry.

With this in mind, however, do note that different plants require different humidity levels (between 45% to 60%).

A cactus, for instance, won’t require as much humidity as a plant from the rain-forest.

Make sure that you understand your plants’ specific needs so that you can set your humidifier to correct levels.

7 Best Humidifier for Grow Room Indoor Plants

If you’ve got a specialized room for indoor gardening, also known as a grow room, in your house, it’s time to consider purchasing a humidifier.

But with market sprouted with so many options, its often tough to get the one that is just right for your indoor plants.

Below are few best options you may consider purchasing if you want to pick the one for healthy house plants.

1- AIRCARE Console Style Humidifier

Built in USA AIRCARE Console Style Humidifier is one of the best to choose when you are looking for a good humidifier for your plants in a grow room.

Efficient enough to automatically humidify room size of up to 3600 sq. ft. it can expel 3.6 gallons of moisture per day.

It comes with refill indicator and easy to fill dual water bottles with a refill hose which makes the refilling task much easier.

Few other key features that come with the unit are:

  • Casters for moving easily
  • 4 fan speeds with auto mode
  • Wick Filter to catch the impurities
  • Digital humidistat to maintain desired humidity
  • Customizable humidity settings with auto-shutoff

Above all this AIRCARE MA1201 Whole-House Evaporative Humidifier is an ETL approved humidifier that can save a good amount on your energy bills.

Just install it in your grow tent/room and make your orchids, ferns, umbrella tree, mushrooms etc happier.

2- Ideal-Air Commercial Grade Humidifier

Ideal-Air Commercial Grade Humidifier is another great humidifying unit which is ideal for grow room, greenhouse and indoor garden.

This industrial humidifier comes with a heavy-duty industrial-grade motor that can work without fail for years to come.

This humidifier for the greenhouse device is easy to install and use as you can connect the device directly to your water supply with your own hookup (uses 1/4 in tubing).

The key features of the unit include:

  • It can cover an area from 160 to 320 sq. ft.
  • Features a multi-directional fogging head
  • Provides a maximum output of up to 75 pints per day

3- LEVOIT Ultrasonic Cool Mist Humidifier

LEVOIT grow room humidifier comes with a 4.5L large water tank that can easily moisturize all your plants day and night without any risk.

The unit works very quietly and turns off automatically when the water level becomes low or when the water tank is removed from the base.

Besides humidifying your weeping figs and peace lilies it also helps in keeping your wooden furniture in a good condition. Few included features in the unit are:

  • 3 mist levels – High, medium and low
  • 3-inch wide tank which is easy to refill filter-free model
  • Ability to emit the moisture for nearly 40 hours with a large tank capacity

Besides all the above features, this humidifier device also features an essential oil tray for adding all-natural essential oils.

Using certain essential oils for plants is a good way to boost up their growth.

Recommended oils when used in gardening can also act as a fertilizer for them and can effectively avoid bugs and other pests.

4- PureGuardian Ultrasonic Cool Mist Humidifier

PureGuardian H940 Ultrasonic Cool Mist Humidifier is next in our list of best humidifier for plants.

With its .5 gallon tank, this filter-free device works very quietly and can produce up to 6L of output for 30 hours of run time.

Ideal for small-sized grow tents and green houses, this space-saving designed humidifier can treat your houseplants in very dry low humid conditions to keep them hydrated and healthy.

Few key features that come with the device are:

  • Treated tank surface to resist mold
  • 3-speed settings with optional night light
  • Refill indicator with auto shut off when empty

5- Horticat U80 Grow Room Humidifier Commercial

HortiCat U80 Ultrasonic commercial humidifier is the world’s first wall mount water supply humidifier that comes with an inbuilt humidistat to control the humidity of your grow-room.

Since the ultrasonic mist produced by this device is in the form of 95% gasified water, it stays in the air to humidify and cool the environment, without creating any mess on the flooring.

The beauty of this industrial grade humidifier is its ability to get multi-linked together so that you can easily achieve the desired humidity – no matter what the size or type of garden/greenhouse you have.

Some of the essential features that are offered by the HortiCat U80 commercial humidifier unit are:

  • Easy to clean wall mount unit
  • Works ultra-quiet to produce ultra-fine no mess mist
  • Connects to your water supply to produce up to 80 pints per day output

6- TTLIFE Warm and Cool Mist Humidifier Auto Humidistat

Just like humans and animals, chilling winters can be harsh for your plants too!

Although many of these cold-tolerant plants adapt themselves to the changing environment and cold climatic conditions, there are many that stops growing during winters.

If you’re grow-room includes such plants that cannot tolerate the chilling frost or cold, it is best to pick a humidifier that comes with a dual mist functionality.

TTLIFE Warm and Cool Mist Humidifier is one such great unit you can go for. This can help get your plants a warm mist of moisturized air in winters so that they feel safe.

It comes with an integrated auto humidistat to control the desired level of moisture levels inside your grow room.

Few other impressive features that come with this machine are:

  • 5.5L capacity to up to 40 hours of continuous use
  • Led screen and 3 levels adjustable mist speed setting
  • Dual 360° rotatable nozzles to provide uniform humidification
  • Unique built-in Ionic Generator technology for purifying the air
  • Ionic resin filter to soften hard water and reduce white mineral coating

7- PureGuardian Warm and Cool Mist Humidifier Auto Humidistat

Just like above, this is also a warm and cool mist humidifier that comes with dual mist features.

This PureGuardian warm and cool mist humidifier comes with a 2-gallon capacity tank that can provide up to 120-hours of run time for hydrating your plants in a large grow room.

Few other impressive features that come with this easy to clean quiet humidifier are:

  • Digital display, electronic touch control, timer, 3-speed settings
  • Smart humidistat sensor to control and maintain the desired humidity level
  • Silver Clean Protection to avoid mold and mildew growth on the surface of the water tank

# Humidifier for Plants and Grow Room FAQs #

However, there are a few common questions we get from people who want to buy one for their grow room.

We have tried here to address some of these questions and answers that can help you greatly when making your purchase.

What Size Humidifier to Choose for Grow Room?


This will generally depend on your grow tent/room size.

For a large grow room with lots of plants, you may need to get a large humidifier (like a console or commercial grade) that can efficiently humidify all the plants evenly.

If required seek professional help to determine the right size humidifier your grow room will need to have.

What Are the Different Types of Plant Humidifiers?


Humidifiers for plants come in various capacities and types. The most common ones are:

• Ultrasonic humidifier
• Cool mist humidifier
• Warm mist humidifier
• Evaporative humidifier

To know in detail about these different humidifier types and their working you can check this article.

What Type of Water Should You Use in Plant Humidifiers?


The type of water your humidifier needs will depend on the type of humidifier you are using.

Certain humidifiers show the signs of white mineral deposits on their surface and tank due to the hard tap water you use that carries heavy minerals.

This may reduce the effectiveness of your device and for performing those best you may need to clean them often.

A good way to avoid these minerals deposits on the device you should use distilled water for humidifiers.

Should You Use Humidifier or Dehumidifier for Grow Room?


The decision you make should be based on the environmental conditions you live in and the season.

• For places with low humidity levels, you need a good humidifier
• For places with high humidity levels, you need a good dehumidifier

Also, for seasons like extreme dry winters, you may need to get a humidifier that can make the surroundings humidified.

And for the season when there is high humidity in the surrounding air you may consider getting a mini dehumidifier.

Plants and humidifier

Can Misting The Plants Increase Humidity?

How to mist plants and its leaves in the right way is an art you should learn so that you can keep your plants happier and healthier.

Your indoor plants in a greenhouse or in a garden need to be misted – just like nature waters them from top and bottom.

Most of us water the plants from the bottom by watering the soil daily. By extracting the needed moisture from the soil plants get hydrated from the bottom.

But to hydrate them from the top it is essential to manually mist them occasionally.

Wetting the leaves by using a spray bottle equipped with a fine misting nozzle is a great way to do so.

Depending on the plant type and its requirement you should mist them regularly by holding the nozzle a few inches away from it.

Mist the leaves and plants from all possible angles. Make sure that the misted leaves seem to be wet but not dripping.

Using a good room humidifier is also a great way to hydrate your plants from top and bottom automatically without worrying about over-hydration.


What Should Be The Ideal Humidity for Plants?

The best temperature and humidity levels for indoor plants may vary significantly depending on the plant species.

In general, for most of the plants, optimum humidity levels are between 50 to 60%.

During winters or very hot summer days, when the air outside is dry, you need to get the best humidifier for your plants.

However, before maintaining these levels by using a plant humidifier it is good to research your plants’ species and the humidity levels that are specifically recommended for them.

For instance, if you are growing or cultivating a specific variety of edible mushroom you should ensure to maintain specific temperature and humidity inside.

If your mushrooms are left at a place with high humidity (or even worse stagnant water) they may likely get mold infestation which can even make them poisonous.

humidifier for grow tent

How to Make a DIY Humidifier for Plants Naturally?

As such there are many ways to increase humidity naturally without using an air humidifier.

But when it comes to making a DIY humidifier for your houseplants or a grow tent, you should try to be specific.

Few exciting ways to make a DIY greenhouse humidifier are:

  • Use humidifying plants
  • Increase water sources
  • Use pebble trays for plants
  • Lower the surrounding temperature
  • Use a humidity tray or mats for plants
  • Use fan correctly and ventilate the grow tent

What Happens When There is Less or High Humidity In A Grow Room?

In the end, we have reached the point where you may have understood the importance of plant humidifiers for your grow tent or grow room.

If by chance you do not care for buying one, it may lead to conditions like very low or very high humidity – both of these conditions are not good for your houseplants.

Low humidity levels inside the grow room may cause dry curled brown leaves, stunted or wilted plants, increased pest infestation.

High humidity levels, on the other hand, may cause root diseases, grey molds on leaves, nutrient deficiencies in plants.

Why not choose a good humidifier for your indoor plants and keep them in a good healthier condition.