How To Choose The Best Humidifier for Greenhouse – Guide

If you are a gardening enthusiast with a greenhouse for your plants, then getting a humidifier for your greenhouse could go a long way in helping you cultivate different types of plants, even when the weather is so dry or lack moisture. For plants to thrive in a typical greenhouse, sustainable humidity is very important. A greenhouse is a closed environment where you get full control over the moisture, temperature, and other conditions that may affect the health and productivity of your plants. However, devices like a humidifier for greenhouse might still be needed to maintain the proper moisture level in your greenhouse at all times. Are you planning to get a quality humidifier? Then keep on reading to find out our top picks and learn about how to choose the right humidifier for your greenhouse for optimal results.

Our recommendation of the best humidifiers for greenhouse consideration in 2021 are as follows:

  • >>HuPro Air Humidifier for Large Room 
  • >>Aircare MA0800 Digital Console-Style Evaporative Humidifier
  • >>LEVOIT Humidifier
  • >>Premium Ultrasonic Cool & Warm Mist Humidifier
  • >>Elechomes Warm and Cool Mist Humidifiers

Features To Consider When Choosing The Best Humidifier For Greenhouse?

Like many other devices, there are different types of humidifiers. But how well you will be able to control the humidity level in your greenhouse depends on the type and quality of humidifier you purchase. Here are some of the factors to consider to ensure that you are getting the right humidifier unit for your greenhouse. 

  • Size: 

The size of the humidifier and that of your greenhouse needs to be taken into consideration. This crucial factor will be necessary for determining if a humidifier unit is right for you or not. Be sure to check the product description to find out its size and the manufacturer’s recommendations for the size of rooms it can be used for. 

  • Humidity Gauge: 

Humidifiers should ideally have a reliable gauge that shows the humidity of the room. While many portable units may not have this feature, it is a desirable feature to have since it makes it easier to monitor how well the unit is performing. Alternatively, you can verify humidity levels using a hygrometer.

  • Assemblage: 

It is important to get a good humidifier that is easy to take apart, clean thoroughly and then reassemble. You may not know how crucial this is until you need to clean your unit and you are experiencing trouble with it. 

  • Noise level: 

This is particularly important if you are planning to run the unit overnight. You’ll want to be mindful of how loud the humidifier especially if this sort of noise bothers you. However, this is not always a make-or-break feature since the unit will be used in a greenhouse away from the rest of your home. 

  • Smart features: 

Good quality modern humidifier typically comes with some smart features. These features improve the ease of use of such units. Since is even more important for greenhouse humidifiers since you most likely won’t be in the same greenhouse to monitor the unit’s performance at all times. Some humidifiers come fitted with sensors that can detect the humidity level in the room and automatically adjust the unit’s performance based on the readings recorded. Some units are also self-cleaning, so you don’t have to waste time on cleaning as often as other types of humidifiers. Other smart features to look out for may include: remote control, digital touch screen feature, timer, and auto-shutoff feature 

Also read: How To Choose The Best Dehumidifier for Greenhouse Discussion

Reviews of 5 Best Humidifiers For Greenhouse

1. HuPro Air Humidifier for Large Room 

Reviews of The Best Humidifiers For Greenhouse

This portable humidifier is a highly efficient unit with a 6L large capacity. This makes it an ideal choice for humidifying rooms of up to 500 Sq.ft size and it sustains the desired air humidity level quite efficiently. It is large enough to improve the air quality and comfort of a small to average size greenhouse. This humidifier has a sleek and modern design. 

This is an easy-to-use digital unit. The smart features of this unit such as the remote control, touch control, and LED screen makes using this humidifier such a breeze and enhances the overall user experience. This unit also has an auto-sensor mode that automatically detects humidity levels in its immediate environment and regulates mist output for optimal humidity output. Cleaning and maintaining this humidifier is easy as well. The top-fill design means you can easily add water to the tank. Cleaning is also easy and you don’t have to remove the tank to clean it. 


  • Colored LED light
  • Silent operation
  • Stylish design
  • Reliable construction


  • The instructions for setting up are not so straightforward. 

2. Aircare MA0800 Digital Console-Style Evaporative Humidifier

Aircare MA0800 Digital Console-Style Evaporative Humidifier

AIRCARE humidifiers add comfortable moisture to your indoor environment during the winter months or any time of year. The Aircare MA0800 is a digital whole house unit designed to operate with evaporative cool-mist technology. It uses wick filters to absorb water while a fan circulates a cool, invisible mist throughout your greenhouse. This functional unit makes maintaining proper humidity levels easier than ever. It can effectively raise and maintain humidity levels to between 30-50% in your greenhouse. 

This console-style unit features three-speed settings including quiet night-time settings so there is no disturbance whatsoever when you leave the unit to run at night. You can switch between these speed levels with digital controls. But the auto-humidistat can also adjust the output level accordingly. 


  • Compact Humidifier
  • Auto-controlled mist output for optimal moisture for your plant’s needs
  • Automatically shuts off when the water runs out or at the desired humidity level


  • It may be too noisy on the highest fan speed

3. LEVOIT Humidifier

LEVOIT Humidifier

This powerful humidifier from Levoit is a combination unit that delivers both warm and cold mist to humidify the air. Thanks to a 5liter capacity, this humidifier can efficiently humidify rooms as large as 750 square feet in size. This humidifier features an auto mode which allows you to set the unit and leave it.

The inbuilt humidity sensor will measure the humidity level in a room and automatically adjust itself. Another smart feature of this large room humidifier is a 1 to 12 hours timer. As a safety precaution, the unit will also shut itself off when the tank is empty. You will also love how easy cleaning the inside of this humidifier is. This humidifier also comes with remote control for convenience. You can easily adjust the settings on the unit from a distance away.


  • Automatic mode 
  • Aromapad for aromatherapy
  • Large tank delivers 60 hours of continuous use 


  • The tank is filled up from the bottom which some users may find a little difficult to maneuver

Important read: Understanding The Best Humidity For Indoor Plants Survival

4. Premium Ultrasonic Cool & Warm Mist Humidifier

This is a compact ultrasonic humidifier designed to release up to 300 ml of mist into the air per hour. This humidifier is affordable and easy to assemble. This smart humidification system incorporates three types of humidity controls. There is an auto-mode, constant humidity mode, and manual control with up to 5-speed levels. Due to its compact design, this is an excellent humidifier for a small greenhouse. You can control the output from light mist to dense fog, depending on your plant’s needs. The humidifier automatically shuts off when it runs out of water for safety.


  • High level of output per day
  • Multi-directional head
  • Connects directly to the water supply


  • Loud operation

5. Elechomes Warm and Cool Mist Humidifiers

Elechomes Warm and Cool Mist Humidifiers

The Elechomes Warm and Cool Mist Humidifier is a combination unit with both warm and cold mist capabilities. The humidifier uses ultrasonic cold mist technology which allows it to operate silently. It dispenses warm mist as well. This versatile design makes it perfect for a wide range of applications. 

The inbuilt humidity sensor measures the humidity level in the room for accurate performance. With a 5.5 Liters tank, this unit is suitable for humidifying large rooms. You will love how convenient to use this unit is. The tank is top-filling which means you can conveniently fill up the tank from the top without a need to disassemble the entire unit.


  • Delivers both warm and cool mist 
  • 360° rotatable spray nozzles for efficient distribution 
  • Ultra-quiet operation especially in sleep mode 
  • Top-fill design makes it easier to add water to the tank 


  • This unit may a lot of white dust around especially if your water is hard


Is a warm or cool mist humidifier better for plants?
Whether warm or cool mist humidifiers, they all produce humidity, and the purpose of moisture is to keep the plant in good condition. If you decide to choose warm mist units over the cool mist or vice versa, there is no problem. How to use either of the models depends on demand but remember not to over humidify the plants.
How do you humidify a greenhouse?
You can try a natural method like placing a bowl of water close to the plant’s area, but if you want a better and faster result, then you can humidity your greenhouse using a good humidifier.
Can you use any humidifier for plants?
Yes, any humidifier type can be used for plants. Nevertheless, incorrect use may lead to excessive humidity that can adversely affect plants’ growth and survival.
Should I put a humidifier in my grow room?
Yes, you can put a humidifier in your grow room if you notice a drop in humidity level. This will help you increase the level, but you need to be on the lookout for the right placement area.
Where should I put my humidifier for my plants?
Keep it close but not too near the plants because humidifiers do generate heat, and this can dry out the plant when it is supposed to make it humid.
How long should I run my humidifier for plants?
You can run it for between 15 to 30 minutes. However, some people run theirs for up to 12 hours. And if the model you have has a timer setting that will make you program the maximum time you want it “ON” before it turns-off.


To control and maintain the humidity level in your greenhouse, you need to choose a reliable humidifier that adequately provides your plants with the needed humidity. Although all the products on our list qualify as a good humidifier for greenhouse, our top pick is the Premium Ultrasonic Cool & Warm Mist Humidifier as the best choice for a medium-sized greenhouse. And if you have a bigger greenhouse, then you should consider the HuPro Air Humidifier for Large Room because it has a larger tank and is capable of covering a larger room.  

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