Humidifiers have been known for their benefits that contribute to moisturizing your skin and reducing the chances of skin problems and also providing relief for those who are prone to allergies. But humidifiers can also be additionally great to modify and balance your room’s temperature for your plants’ optimum growth needs. The best humidifiers for grow rooms have multiple purposes including conserving plant moisture and lowering the rate of evapotranspiration in plants.
Humidifiers increase the moisture count in any given area by providing the air with water vapor, in the form of either a hot or cool mist. Our list of the best humidifiers will make you a proud indoor gardener, so you can provide your plants with the best environment to bloom in.
Top Products From Our List
13 Best Humidifiers For Grow Rooms
The Geniani Ultrasonic Cool Mist Humidifier has 4 mist settings and doubles as a diffuser to fill your room with your favorite essential oils, while you enjoy the humidifier’s cool mist. You can maintain an automatic healthy humidity level with this product that is easy to use with its built-in intelligent sensor or even manually adjust the moisturizing speed at a click of a button. With this humidifier that has a 4-liter water tank, refilling and cleaning are also simplified, which makes it ideal even for baby nurseries. Additionally, it comes with a soothing LED night light that can help children fall asleep.
- 2-in-1 humidifier and diffuser
- Comes with a 2-year warranty
- 38 dB noise level
- Auto-shutoff feature when water is empty
- Covers up to 220 sq. ft.
- Lasts up to 18 hours
- This product may be prone to molding and requires regular cleaning with a q-tip or a toothbrush.
You can instantly revitalize your room with the Levoit Hybrid Ultrasonic Humidifier that refreshes your room with both a warm and cool mist for all your indoor planting needs. The cool mist can handle spaces as large as 753 feet, and is ideal for combating dry and stuffy air that will keep your plants well-hydrated. The humidifier has an in-built humidity sensor that automatically adjusts the mist level to maintain a comfortable level of humidity, so you can set it and stay worry-free. If the tank runs out of water, the humidifier will automatically turn off, making this product a convenient option.
- Easy to clean
- Ultra-quiet operation
- Comes with a convenient remote control
- Ideal for large rooms with a mist output of up to 500 mL per hour
- Allows for 60 hours of continuous use at the low mist level
- Filter-free humidifier
- Spill-proof water tank
- Does not come with an oil essence
The Homasy VicTsing Cool Mist Humidifier is beneficial for indoor plants as it promotes plant growth by helping return moisture to the air. With a 2.2-liter tank, the cool mist humidifier allows up to 24 hours of use in the low mist setting. The omnidirectional rotating nozzle ensures an even level of humidity distributed in your room for the breath of fresh air that your plants need. Designed with a 3.25-inch large opening, this cool mist humidifier is convenient to clean and refill and its arc-shaped handle with anti-slip grooves offers you a secure grip so you can easily carry it around.
- Adjustable mist output feature
- Ideal for small and medium grow rooms and grow tents
- Low noise
- Auto-shutoff feature
This product may not be suitable for larger rooms.
If you are looking for a smart humidification system for your plant grow room, the HuPro Warm And Cool Mist Ultrasonic Pro-773 Humidifier is a good choice. With a 5.5-liter tank that works for large rooms, this product lasts up to 40 hours of continuous operation with just 1 refill. This product comes with an air ionization and ceramic filter with active carbon and mineral pellets for triple purification and an odor-free environment. This product is also user friendly and has an easy leak-proof cleaning design with a detachable water tank and a secure built-in handle.
- Works for rooms up to 500 sq. ft.
- Adjustable warm and cooling settings
- 3 types of humidity control
- Functions at a near silence frequency below 30 dB
- Produces 300 million cleansing ions per minute
- May produce white dust and requires to be cleaned often.
With a sleek and compact design, the Pure Enrichment MistAire Studio Ultrasonic Cool Mist Humidifier is ideal for small grow rooms. With adjustable high and low mist settings, you can modify the environment to the optimum option for your plants. This humidifier delivers up to 60 ml of moisture per hour on the low setting. Keep your plants healthy with this product that also allows for a hassle-free continuous overnight operation.
- 5-year warranty
- Runs up to 10 hours on the low setting
- Has a 0.7-liter water tank
- Optional soft-glow night light feature
- Easy to operate
- It may not be ideal for larger rooms
A fantastic personal humidifier, the TBI Pro HumidMaster provides moist and pure air for your plants to flourish in. With a 30 dB sleep mode feature, and 3 mist level settings (low, medium, and high), this product has a convenient design and operates silently. Not only does the cool mist humidifier come with a 6 L tank, it also provides 360° humidification with its rotating nozzle. Your plants will get an even level of humidity that is free from impurities as this product also comes with a medical stone filter.
- Easy to clean and refill
- Spill-proof design
- Covers a 750 sq. ft. area
- Adjustable mist direction
- May leave a white residue around the product
The iTvanila HU-C1A Cool Mist Humidifier provides moisture to your grow room with a large capacity of 2.7 liters. With a whisper-quiet operating feature below 27 dB, the scratch-resistant product can be used for maximum moisture retention in the room. The safe knob design provides an adjustable amount of mist and prevents accidental opening, making this product easy to use around children and pets. You can use this humidifier, that is made of longer life nanomaterials for up to 30 hours with just one refill.
- Ultrasonic humidification
- Auto-shutoff feature
- Can cover up to 268 sq. ft.
- Comes with a 360° nozzle
- High output of up to 210 mL per hour
- Easy to clean
- May soak the area around the placement of the product
With the Megawise 2-in-1 Cool Mist Humidifier, you can create a safe and healthy environment for your plants. The ultra-quiet humidifier has a noiseless design that works in 25 dB and helps your plants to fight dryness and heat. The product has a 1.5-liter water capacity, saves energy, and can run up to 10 hours at the low level and up to 6 hours at the high level.
- Automated shutoff feature
- 2-year warranty
- Works best only with distilled or demineralized water.
- The area around the product needs to be kept dry
The Elechomes Ultrasonic Cool Humidifier comes with a remote control so that you can decide your settings from 6 meters away. The 4.5-litre tank is large and supports a 38-hour continuous use period, so you can leave your plants around the humidifier and expect to see positive results. The device operates silently and has a 1-12 hour intelligent scanner and a dual spray nozzle that covers an even area for your convenience. It also comes with a large water inlet design, making it easy to deep clean the inner walls of the water tank.
- Child-lock function
- Fahrenheit display
- Good for spaces up to 528 sq.ft
- LED digital screen with humidity, temperature, and settings
- A built-in water filter that absorbs impurities
- It may not be ideal for larger rooms
Dynamically manage air humidity with the Mooka Smart Humidifier that has an in-built humidity sensor to detect room temperature and change the mist output to maintain your desired humidity. Easy to clean, this humidifier has a 4.5 L large open tank that allows you to use the product for 2 nights with every refill. The humidifier has a high-efficient ultrasonic atomizer that works as many as 2.4 million cycles per second and produces an ultra-fine spray. It also consumes less than 1/10 electricity as compared to other humidification methods.
- Top-fill design
- Standby and safety mode for when water runs out
- Comes with a timer of 1-8 hours
- Water level window
- Some may find it slightly noisy
A higher level of humidity will promote the growth of moisture-loving plants, and the Kyvol VygoAir HD3 does just this and more! You can even prevent your wooden furniture from shrinking and cracking with this product that comes with a 4.5 L large tank that offers up to 75 hours of humidification. Ideal for large rooms, this ultrasonic humidifier is made of durable and safe BPA material and operates incredibly quietly at 26 dB.
- Auto-shutoff feature
- 360° rotating nozzle
- High mist height of up to 25.5 inches
- Coverage of up to 430 sq. ft.
- Waterproof base
- Dustproof sponge filter
- Refilling may require some amount of effort.
The Odec HU-H03 Ultrasonic Cool Mist Humidifier boasts a 4.5 L capacity and is compact and powerful to add more moisture to the air in your grow room. With up to 45 hours of continuous use time, you can also adjust the mist level, speed, and high and low nozzle directions for optimum coverage. This product comes with a nightlight and works effectively to boost the humidity in dry conditions. The humidifier can be filled with fresh water through the top opening and has a transparent gauge that indicates the water level, making it convenient to use.
- Ideal for medium-sized rooms
- Auto-shutoff feature
- Operates between 25 dB – 35dB
- 360° rotatable nozzle
- The ambient light may be brighter than you expect.
Not only can you plug this into a USB, it can also be moved more conveniently and operates at a sound of less than 30 dB. It comes with 2 nightlight modes to choose from including an LED nightlight and a breathing light mode. Delivering up to 6 hours of runtime with one refill, this product is ideal for desktop plants and other small indoor gardening needs.
- Auto-shutoff function
- Best suited for tap water or mineral water
- Uses a type-C interface and is compatible with a USB set
- Can produce spraying between 40-70 ml per hour
- Suitable for air-conditioned rooms
- 2 spray modes
- Does not cater to larger areas
Now that you have taken a look at our list of the best humidifiers for grow rooms, you can buy one that best suits your needs. There are many features to consider when it comes to getting a humidifier, so check out our buying guide that will help ease you into the buying process.
Things To Remember Before Buying A Humidifier For Your Grow Room
- The size of the water tank
As it is an imperative part of the mechanism, every humidifier comes with a water tank. The question now is how much water it can hold in its container. You need to replace the water in it every 12 to 16 hours if the size is as small as a gallon. On the other hand, certain models can have a water tank of up to 6 liters, and for those, the water changing frequency is lesser.
- Area coverage
It’s the size of the room your humidifier should cover and this depends on the humidification rate and the device’s run-time. Both of these data vary between models so you should look for one humidifier that can cover about 100 square feet of area in case you are growing plants in a tent. In the case of larger sized tents or rooms, the ideal models should cover up to 600 square feet.
- Humidity settings
The humidity or the misting settings decide how much the room or area is humidified. If you want to humidify the room quickly, look for a humidifier with high settings and 300 ml of water per hour. You may choose lower settings in the case of smaller rooms.
- Safety features
As long as an electrical device such as a humidifier is on a buyer’s radar, safety is quite essential. As a safety issue, many models feature an auto-shutoff function. If it’s automated, the humidity level will be detected and the device will automatically shut off when it’s damp enough. Some modules might take a preset time-span and shut off automatically after the time is up.
Uses Of Humidifiers For Grow rooms
There are some specific stages of plants that require good humidity in the air if you take indoor gardening seriously. These are 2 phases of plants, seeding, and germination, to be specific and both require suitable environments for plants to flourish in. During the germination stage, growth takes place at the root of the plant. A very high level of moisture between 60-70 Rh is expected to be maintained by them. If the humidity of the entire environment is not elevated, you can try using humidifiers.
Additionally, the growth of the body of the plant and the leaves takes place throughout the vegetative stage, and therefore, they would need a good amount of vapor in the air. The root is responsible for the partial consumption of water but it is imperative to demand in-air humidification.
How To Use A Humidifier
Step 1: Read your plant grow room humidity using a thermometer or hygrometer.
Step 2: Set the humidifier into action. The setting up includes filling up the water tank and powering the device in.
Step 3: Place it in the right corner of the room for optimum coverage
Step 4: Choose the humidification rate, whether low, medium, or high.
Frequently Asked Questions
1. When should I use a humidifier for my plants?
You can use a humidifier at all times of the day and night.
2. How much water can a humidifier mist in a day?
This is usually based on the humidifying capacity of the model and can usually be up to 2 L of water in 24 hours.
How do I keep the humidity up in my grow tent?
You can use a humidifier, but you can also use a small mist spray bottle or place a swamp cooler in your grow tent. You may also place trays of water near air pockets or install a drip watering system inside.
3. How much humidity should be in a grow tent?
For most crops, you need to maintain the humidity level of around 40-60% in your grow tent. However, this entirely depends on the type of species you are cultivating.
4. Where do you place the humidifier in a grow tent or room?
If the humidifier comes with a 360° nozzle, you can put it at the center of the grow room or tent.
5. Are humidifiers accident-prone?
No. If you set the automatic shutoff feature right, and follow the instructions, they will not malfunction.
Growing indoor plants also implies investing in a grow room and a humidifier. It’s undeniable that growing plants are protected from direct sunlight and outside forces by an enclosed environment but this may have some drawbacks, and this is why a humidifier becomes essential. The humidifier will help you control the temperature and humidity output in a grow room to ensure that your growing plants survive. Choose an easy-to-operate humidifier, which can spread mist in your grow room or grow tent reliably, and can operate for long hours.