The Best Humidifier for Plants Buying Guide 2020

Humidifying indoor plants is as important as when you increase your room moisture level to prevent dry skin, nose congestion, and the rest of the problems caused by low humidity. Indoor plants need a balance of humidity levels and grow led light to stay healthy. Do you want your plant leaves to remain greener at all-time, especially in the winter months? You will need to place a humidifier close to them for the constant releasing of moisture. The best type of humidifier for plants is a design that has automatic humidistat for auto humidity regulation. Hence, you won’t need to monitor the plant’s humidifier often. However, lots of options are available on the market when it comes to the best humidifier for plants. Many brands out there to draw your attention, but few of the tested appliances show optimal performance. Therefore, for those who want a DIY to make a humidifier for plants, our buying advice is that you should buy if you cannot do-it-yourself method. 

Here is a list of top 5 best plants humidifier 2020

  • Honeywell HCM350W Plants Humidifier    
  • Evergreen for plants Humidifier
  • TaoTronics 4L Cool Mist Ultrasonic
  • HemingWeigh Ultrasonic Cool Mist

Top 5 Best Humidifier for Plants Reviews

1. Honeywell HCM350W

The Best Humidifier for Plants Buying Guide 2020

This unit is going to supply moisture for plants for a lengthy duration up to 24 hours operation. The running times relieve you from frequent refilling and also ensure plants are benefited.

The Honeywell HCM features a kill germ technology helping to destroying germs that maybe presents in the water before releasing the final output. Therefore, you’ll be protected from contaminated air each time you enter your grow room or greenhouse.

It comes with a wicking filter that allow, moisture to be saturated faster into the atmosphere compared to ultrasonic models. The filter is easy to wash and should get dry out before returning into the device.


  • Quiet operation
  • Sturdy design balances well on any flat surface


  • It lacks a humidistat
  • For medium sized plants rooms

2. Evergreen for Plants Humidifier

The dimension and weight of the Evergreen make it easy for lifting within plants that need a humidifier per time. The little size also means it’ll only take small area placement.  

It has an adjustable fogger that ensures moisture releasing in the direction of choice. Since the aim is to ensure indoor plants are well humidified, you can direct the fog close to the plant for efficiency. 

The unit tank is large and can accommodate up to 2 liters of water and runs up to 24hrs in one refill. The tank is equipped with run-dry protection to turn off the unit once the water gets dries.   

Apart from plant use, the Evergreen can be used for reptarium, aquarium, vivarium, etc. but you’ll need to use distilled water for this need.   


  • Small size 
  • You can direct mist where needed 
  • Auto shut off on low tank level 


  • Lacks auto humidity control 

3. Pure Enrichment MistAire Ultrasonic

Pure enrichment is an award-winning humidifier for different environment utilization. It has received up to 30000 user reviews and has got 69% star ratings. The humidifying features it has made it possible to enter into our best humidifier for plants consideration. 

As an ultrasonic model, it does not use a filter in its operation, hence you won’t worry about filter replacement cost. Also, make cleaning less task compare to filter system models. 

The low water sensor technology shut-off once no liquid to disperse for plants, and this protects your device from damage. 

Further, feature two-speed control such as high or low to customize the rate of moisture supply. In high settings, the last 16 hours. Meaning, low-speed will last more, thereby reducing refilling. 


  • Reduce noise operation 
  • 5-year warranty back up 
  • No filter cost to incur 


  • Not ideal for large space 
  • Has 1.5-liter tank 

Note: Before moving to the next product review, humidifier placement for plants is very important. Ensure that it is not too close or far from your plant. If it is too distant, the plants may not receive an adequate humidity level, while too close means excessive moisture that can affect its survivor.  

4. TaoTronics 4L Cool Mist

TaoTronics 4L Cool Mist

Your plant will be a favor from the operation of this unit that will deliver just the right amount of moisture required, thanks to the built-in humidistat. 

Remember, we mention a humidistat in the earlier section of this post as one of the basic for the best humidifier for plants grow room. This is because a humidistat sensing the amount of air moisture informing you when to turn it one or shut-down for the best relative humidity for plant growth. 

Taotronic is not for use in a country whose voltage is more than 110v, as such a perfect choice for United States residents. In addition to the specs, it comes with 1 gallon capacity for up to 30hrs running and also a quiet model. 

Most relevant, it has a cartridge that filters water, getting rid of micro-organism and odors so that your air is not polluted. 

While this product proves efficient for humidifying plants in the house, but does not support the use of essential oil. 


  • Super quiet 
  • The idea for spaces reaching 322 square feet
  • Humidistat gauge lets you set desired humidity levels


  • Replacing of the micro-porous filter every 4 – 6 months

5. HemingWeigh Ultrasonic Cool Mist

HemingWeigh Ultrasonic Cool Mist

A close comparison of the various best plants humidifiers, each has its unique features likewise this Hemingweigh cool mist. It is the only one with the highest coverage ability of 500 sq. ft. 

You’ll like this unit for long hours to use humidifying to keep your plants moisten and happy. It is installed with a 4.5L tank and lasts for 32 hours. Its 3-mist control settings, so you can tailor the speed at which you moisture release to your indoor green plants. 

The top-fill water tank design is another most important reason to choose Hmingweigh because of not stress refilling or tough cleaning. It also comes with a user-friendly remote, making it different from the rest of the products outlined in this best humidifier plant discussion. 


  • Has a 360-degree rotating nozzle 
  • Operates at 32-decibel sounds 
  • Aromatherapy ready box for essential oil 


  • At high speed, you may start seeing visible fogs.

Want the Best Plants Humidifier for Indoor, Grow Room or Greenhouse: Decision Guide

Choices are always available when it comes to buying the best humidifier for plants. For informed decisions, the few most important things to remember when choosing are. 

  • Your plant room size

Grow rooms are of different sizes. Yours may be bigger or less than someone else. The supposed humidifier you want to buy should have possessed the capacity to serve your plant’s room efficiently. 

Therefore, you need to check the coverage capacity of the unit. Follow this:

For large-sized planting rooms above 500 square feet, the best model to buy is the large-sized humidifier. 

Where the square footage is between 350 to 450 sizes, a medium-size humidifier is best, while below 300 square feet grow room, a small humidifier is what we recommend. 

Too low humidity levels or excessive moisture do not encourage the thriving of plants. Between 40 and 60% humidity levels, plants can do well.

  • The type of humidifier 

Using a humidifier for plants should be flexible when it comes to transporting. Different types and sizes are available, and each one with distinctive features. 

Evaporative mist is more promising for plants because of the invisible mist, they released, unlike most ultrasonic models that disperse mist droplet which may settle on the plant leaves. Mind you, when mist settles on the plants and doesn’t get dry out, it will affect the plant. 

Also, consider a portable model that can allow you to move around your plant. As you humidify, don not place the humidifier close to the place because of the heat that they do emit. When it is too close, the heat coming out will gradually be drying the plant instead of keeping it moisture ad healthy. 

  • Tank size

Literally, the bigger the tank size, the more running time and lesser refilling. On the other hand, when it is too small, the operation time is shortened, likewise refilling. 

The bottom line, look for products with a larger water intake tank to avoid the inconveniences of frequent tank fill. 

  • Noise level

This is applicable if you want to release humidity to your decorative plants in your room. 

You don’t want to sacrifice your sleeping even though your plants are uttermost. 

Most of the best humidifiers for plants have fans that enable them to circulate mist, but they can be noisy as well. 

To avoid your sleep being interrupt, you’ve to dig deep and read reviews on the loudness of the device you before you deciding. This TaoTronics Humidifiers, 4L Cool Mist Ultrasonic Humidifier runs quietly. Check it out. 


What type of humidifier is best for the plant does not matter as long as you don’t know how to use your device correctly. It is possible to have the best one, but inappropriate use will undermine its performance on your crops, veggies, flowers, or plant growth. 

One thing to understand, most plants require 40 or 60% moisture levels to retain their beautiful look. The right humidity gauge is fundamental for raising healthier indoor planting. 

The next is positioning, or placement, not too close or far away, ensures a good saturation of mist on plants while reducing heat supply. If you’re lucky to get an automatic humidifier for the plant, then moisture level can be maintained, as the unit will regulate itself. 

Take home: do not contaminate your home with bacteria or white dust spraying on beautiful flowers. Therefore, clean the appliance following the user manual guide. 

Below are other top-rated products you can as well check for their performance:

  • Elechomes SH8830
  • iTvanila Cool Mist
  • HUMIDIMASTER 6L Ultrasonic
  • TaoTronics Humidifiers
  • Portable Mini Humidifier

We hope this best humidifier for plant discussion ad reviews has to give you an insight into knowing what is ideal for your need. If so, pick your choice to keep providing moisture for plant growth.