5 Best Small Humidifier for Plants Reviews In 2021

Whether you have chosen to grow plants for their medicinal value, beauty, or just for fun, you must watch them thrive. Growing plants indoors is a practice that has become so prominent in our world, today. Although you get to water them and the sun shines in them, however, a factor might not be sitting right with the plants and that is the humidity around them. You can solve the problem of dry air or too moist air in your grow-room by finding the best small humidifier for plants.

Top recommendation ;

  • >>TaoTronics Humidifier for Large Bedroom
  • >>Proscenic 808C Humidifier
  • >>GENIANI Top Fill Cool Mist Humidifier
  • >>Homech Cool Mist Humidifier
  • >>TaoTronics 4L Cool Mist Ultrasonic Humidifier

Types of Humidifier for Plants

There are three types of humidifiers for plants, namely:

  • Filtered Cool-Mist Humidifier 
  • Filter-Free Cool-Mist Humidifier
  • Warm Mist Humidifier 

The Filtered cool-mist humidifier is otherwise called the Evaporative Humidifier. They emit cool invisible moisture into the atmosphere by drawing water from their tank into a wicking material and using the airflow to create vapor. It requires a replaceable wicking filter to operate well. It also features a filter that helps trap minerals to prevent white dust from being dispersed into the air. However, this filter has to be replaced more frequently especially if your source of water produces hard water.

5 Best Small Humidifier for Plants Reviews In 2021

A filter-free cool-mist humidifier is also known as Ultrasonic Humidifier. Its operation is not as neat as the filtered cool-mist humidifier because it gives off white dust from hard water. However, a cool visible mist is produced when used with distilled water. The mechanism by which this humidifier works is that a nebulizer vibrates at an ultrasonic frequency (hence the name), breaking water molecules and droplets into a fine mist, which is then dispersed to the air.

Warm Mist Humidifier is the most common type of humidifier in the market, today. Relatively, they appear to be the cheapest too. This humidifier works by boiling water in a heating chamber up to a temperature that causes the water to vaporize. The vapor is then released into the air as a warm mist. One downside to this humidifier is that it requires constant and too frequent cleaning; this is as a result of the heating element which may become encrusted with mineral deposits.

How To Choose The Best Small Humidifier For Plants

You need to make an informed decision when investing in a small humidifier for plants. If you are growing plants indoors, purchasing the best humidifier for your plants is inevitable to keep off bad, and dry air. Take note of these factors when choosing the best small humidifier for plants:

Grow-Room Size

The room size of your grow room is an important factor to note. The best humidifier for plants might not give you the desired result if it is appropriate for that room size. Rooms with small dimensions would require small-size humidifiers, medium-size rooms, medium size humidifiers, and larger rooms will require large-sized humidifier. 

With this in place, you would not end up with too little moisture in a large room and too much moisture in a small room. The right proportion, to the right room size, is dished out.


If you live in or have a climate condition where your plants find it hard to stay warm and are always foggy, tender, and too moisturized, then this temperature will utterly affect your choice of the best small humidifier for plants. A place too cold would require that you get a warm mist humidifier.

If your area is getting too warm at a period, you might want to consider a cool-mist humidifier.

However, all thanks to technological advancements, we have brands and humidifier types that now incorporate both cool and warm mist settings in one gadget. 

Humidifier Type

There are evaporative humidifiers, ultrasonic humidifiers, warm and cool mist humidifiers. All of which are advantageous and with their demerits, too. Understand your grow room and pick that which best suits your plant’s needs. 

Evaporative and ultrasonic humidifiers are excellent choices for small spaces as they are compact and portable. Warm mist humidifiers, on the other hand, are more energy conserving than cool mist humidifiers.


Some humidifiers might cost you so much more, after purchase, on maintenance. Humidifiers might utilize a filter, replaceable or not. The humidifiers with replaceable filters will mean that you purchase filters when the installed one goes wrong. 

Cool mist humidifiers, based on their mechanism of action, give room to bacteria and mold that grows in their water tank. This makes the dispersed moisture unhealthy. Plus, you would need to clean the tank very often.

Noise level 

Most ultrasonic humidifiers have whisper-quiet operations, and if your grow room is close to your place of relaxation, you are confident to experience no noise disturbance or sleep distortion.

Other humidifiers, by brand and making, have different noise levels measured in Decibel. The information on the number of Decibels produced by the humidifier is always indicated on its package. However, the noise produced by humidifiers is not a gauge of their effectiveness or ineffectiveness. Some humidifiers make use of fans and rotating objects, which, inevitably, produces noise.

Power consumption 

Going for humidifiers that are energy-conserving does not just help the environment and the eco-system but it also saves you a dollar or two from your electric/power bills. Hypothetically, warm-mist humidifiers consume more energy since they must bring the water to a boil inside the tank before dispersing moisture. On the other hand, cool mist humidifiers consume less since they simply store water and disperse when necessary.

Water Tank 

It is recommended that you go for a humidifier with a large water capacity. This act does not just reduce your stress of refilling the tank too frequently, but it also ensures the plants get enough and maximum mist output at once on which they can rely for the rest of the day.

Reviews of Best Small Humidifier for Plants

1. TaoTronics Humidifier for Large Grown Room

TaoTronics Humidifier for Large Bedroom

Having a water tank capacity of 6litres, you must have noticed that it is meant for large rooms. This water level can last for 60hours in a room up to 753 square feet. It is perfect for your nursery and indoor gardens as it produces both warm and cool veils of mist. Its water tank is a top-fill type with a wide opening that makes it easy to refill and clean. Additionally, it has a tray that helps in diffusing essential oils and fragrances into the air.

This humidifier has a remote control that allows you to control the device from the comfort of your seat and bed. Other features of the humidifier include LED display, sleep mode, customized and smart humidity detector, and an auto shut-off when the water level is low.


  • Easy to use and clean
  • Features sleep mode
  • Low noise level
  • Dual mist output


  • LED display is too bright for sleep at night

2. Proscenic 808C Humidifier with App Alexa and Google Voice Control

Proscenic 808C Humidifier with App Alexa and Google Voice Control

Proscenic 808C Humidifiers is a large capacity and smart device that works with your phone (App Alexa and Google voice) to take control and operation easier. It has a tank capacity of 5.3litres with a maximum run time of 30hours. This mist humidifier has 7-speed gear adjustments, baby mode, negative ion function, and an automatic humidity stabilizer.

Its intelligent humidity sensor senses the humidity in the air and automatically adjusts output to meet the demand. Also included in this device is a container for aromatic functions. You can diffuse essential oils from the container using this humidifier.

There is a timer setting in the device that allows you to schedule humidification time and mode. Once the goal is reached, it shuts off, automatically.


  • Remote, Phone, App and voice control
  • LED display with touch buttons
  • Essential oil tray
  • 360degrees spray nozzle


  • Does not support IFTTT

3. GENIANI Top Fill Cool Mist Humidifier

GENIANI Top Fill Cool Mist Humidifier for Bedroom

The GENIANI humidifier is also a diffuser that allows you to enjoy the awesome fragrances while you add moisture to the air. Its tank is built-in, top-filled, and has a capacity of 4litres with a transparent water gauge and a removable lid.

It is ideal for your plants and flowers. You can maintain a healthy humidity level with the smart automated mode that this device features – it has an intelligent sensor. However, you can also manually adjust the device to your desired speed, output level, and intensity. The unit is whisper-quiet and would not interrupt your sleep with noise.


  • Large and well-calibrated water tank
  • Top-fill design
  • Smart mist adjustment
  • Sink washable


  • Mightbe a little tricky to clean

4. Homech Cool Mist Humidifier

Homech Cool Mist Humidifier

Homech Cool Mist humidifier is classy and has a sleek design. That being said, it is designed with a 360degrees rotating nozzle that disperses moisture to as far as 24inches vertically. It is a known fact that ultrasonic humidifiers work quietly, the same is the case for this humidifier; its operation is incredibly silent.

When the water is drained or low, this unit automatically stops misting. The mechanism is to prevent your device from overheating. Homech has long working hours of up to 50hours when its 4L tank is filled with water. The 90mm width opening on the tank allows for easy refill and cleaning.


  • Filter-free operation
  • High efficiency and utility
  • Whisper-quiet operation
  • Step-less knob dial


  • The tank might breed molds and mildew especially the edges.

5. TaoTronics 4L Cool Mist Ultrasonic Humidifier

TaoTronics 4L Cool Mist Ultrasonic Humidifier

This humidifier will do all the work to help maintain the humidity and optimal moisture level in the air. It is an efficient humidifier with a 4L tank capacity that can run for 30hours working time when on a full tank. The LED display ensures that you are abreast of the necessary information and the built-in humidistat tells you the current humidity level.

It is safe to use when in bed, as it is noiseless and shuts off automatically when water runs out. You can also choose to turn off the LED screen for an undisturbed sleep at night. Other features include 3-mists output, timer setting, sleep, and night mode.


  • LED display and touch screen
  • Built-in humidistat
  • Waterless automatic shut-off
  • Quiet operation


  • Produces white dust mist
  • What kind of humidifier do I need for plants?

There are various kinds of humidifiers for plants, in the market. However, to get the right humidification for your plants you must consider factors such as the deficiency you want to replenish, the grow room size, the weather, maintenance, and humidifier type.

It is pertinent to know that humidifiers are not particularly made for plants but rather humans. So you can go for the kind of humidifier that suits your plant’s needs and has little or no adverse effects. Make sure the right amount of humidity needed is the right amount produced by the best small humidifier for plants.

  • Can I use a regular humidifier for my plants?

Yes, you can. However, this is tied to the condition that it works well with your plants and meets your need, appropriately.

Read Also: The Best Humidifier for Plants Survival Discussion In 2021


TaoTronic Humidifier (6L) stands tall among the best small humidifier for plants, hence, it is first on our list. It is not just easy to use and clean but it has a low noise level. For its budget-friendly price, you have more worth for your money. It has a large water capacity of 6litres, and you do not have to refill the tank in days. Once filled with water, the device can run for 60hours of working time. Isn’t that amazing? 

So if you are limited on a budget but still want the best small humidifier for plants, the best small humidifier for your plant is TaoTronics Humidifier (6L).

A more portable and stylish small humidifier for plants is the GENIANI Top Fill Cool Mist Humidifier for Bedroom. It is a smart device and essential oil diffuser at the same time. It is compact, easy to clean, and shuts off automatically when the water level is low. A major merit of this humidifier that makes it excel the rest is that it is very durable and would complement the look of your home, grow house, and garden.