6 Best Plant Humidifiers of 2021

Last update: 2021-10-17

Living in a big city makes it difficult to have plants because you won’t likely have extra land or space for a garden.

Luckily, we have grown rooms now that allow for indoor planting. And to provide enough humidity for indoor plants, you must have a humidifier.

Today, we are more than happy to help you find the best plant humidifier through this comprehensive guide.

Here are the best plant humidifiers you can buy in 2021:

  • Best Overall (Bottom Fill Humidifier): Magictec 2.5L Cool Mist Humidifier
  • Best For Bedroom (Bottom Fill Humidifier): TaoTronics Humidifiers, 4L Cool Mist Ultrasonic Humidifier
  • Best For Consistent Performance (Bottom Fill Humidifier): LEVOIT Humidifiers
  • Best Overall (Top Fill Humidifier): GENIANI Top Fill Cool Mist Humidifier
  • Best For Large Rooms (Top Fill Humidifier): Miroco Cool Mist Humidifier, 26dB Ultra Quiet, 6L top filling
  • Best For Rapid Humidification Effect (Top Fill Humidifier): Kealive 30-Hour Cool Mist Humidifier
6 Best Plant Humidifiers
Best Overall
Magictec 2.5L Cool Mist Humidifier
  • Bottom Fill Humidifier
Best For Bedroom
TaoTronics Humidifiers, 4L Cool Mist Ultrasonic Humidifier
  • Bottom Fill Humidifier
Best For Consistent Performance
LEVOIT Humidifiers
  • Bottom Fill Humidifier
Best Overall
GENIANI Top Fill Cool Mist Humidifier
  • Top Fill Humidifier
Best For Large Rooms
Miroco Cool Mist Humidifier, 26dB Ultra Quiet, 6L top filling
  • Top Fill Humidifier
Best For Rapid Humidification Effect
Kealive 30-Hour Cool Mist Humidifier
  • Top Fill Humidifier

Best Overall (Bottom Fill Humidifier): Magictec 2.5L Cool Mist Humidifier

Magictec 2.5L Cool Mist Humidifier
Magictec 2.5L Cool Mist Humidifier
9Outstanding
Pros
  • Relatively quiet – emit under 30 decibels of noise
  • Able to adjust the mist output and direction without moving the whole machine - a 360-degree nozzle spray + adjustable mist output function
  • Safe – auto-shutoff feature
Cons
  • The indicator light could be better

Magictec 2.5L Bedroom Essential Humidifier is currently one of the most affordable options that you could find on the market.

It is easy to use, relatively quiet (under 30db of noise) while putting out a lot of vapors. A cool thing is this tool can provide humidity all-around your grow tent/room using a 360-degree nozzle spray and adjustable mist output function.

When it runs low on water, it will automatically shut off – a great feature. This ensures that the machine won’t run dry then burn up.

Magictec 2.5L Cool Mist Humidifier Specifications

Dimension

11.6 x 7.9 x 7.8 inches

Capacity

2.5L

Playtime

24 Hours

Highlight Features

Emit under 30 decibels of noise

A 360-degree nozzle spray + adjustable mist output function

Auto-shutoff feature

Verdict

If you’re finding the best overall bottom-fill humidity for your plants, this is the shiniest contender.

Best For Bedroom (Bottom Fill Humidifier): TaoTronics Humidifiers, 4L Cool Mist Ultrasonic Humidifier

TaoTronics Humidifiers, 4L Cool Mist Ultrasonic Humidifier
TaoTronics Humidifiers, 4L Cool Mist Ultrasonic Humidifier
9.4Outstanding
Pros
  • Durable – Nano coating
  • Long runtime – from 12 to 30 hours on a 4-liter tank
  • Not disturb your sleep – nightlight, timer, and the sleep mode
Cons
  • Small opening
  • Short cable

TaoTronics 4L Cool Mist Ultrasonic Humidifier is new and improved. It uses Nano coating to protect the circuit boards for moisture, which extends the life of the machine.

Besides, the 4-liter capacity will last you up to 30 hours depending on the setting you choose, and the settings are low, medium, and high. Mist is sent up high into the air so the table won’t get damp.

It also has a timer and nightlight which you have the ability to turn off using the sleep mode. That’s all packed into a nice, little minimalistic body, which we really like.

TaoTronics Humidifiers, 4L Cool Mist Ultrasonic Humidifier Specifications

Dimension

8.07 x 5.31 x 11.81 inches

Capacity

4L

Recommended Room Size

10-30 m² / 107-322 ft²

Playtime

12-30 hours

Highlight Features

Nano coating

12-30 hours of runtime

4-liter water tank

Nightlight, timer, and sleep mode

Verdict

Due to its nightlight which is able to be turned off using the sleep mode, the TaoTronics 4L Cool Mist Ultrasonic Humidifier is our best pick for plants in your bedrooms.

Best For Consistent Performance (Bottom Fill Humidifier): LEVOIT Humidifiers

LEVOIT Humidifiers
LEVOIT Humidifiers
9Outstanding
Pros
  • Offer the longest runtime, up to 40 hours
  • Ideal for extra-large areas - Huge coverage of 285 to 376 square feet
  • Humidify evenly - 360-degree mist nozzles
  • Easy to clean - a wide opening, includes a cleaning brush, and has a handle on the water tank
Cons
  • The light indicating is too bright in the darkness

Featuring the same water tank but this LEVOIT bottom-fill humidifier runs a bit longer, up to 40 hours, and its coverage is also larger – within 285 to 376 square feet.

The machine allows you to choose between three mist levels. Using 360-degree mist nozzles, it directs the humidity all around for maximum comfort. When it’s time for bed, this unit can run without light and operate quieter than a library (under 30 decibels of noise).

Just like other counterparts here, once running out of the water, it automatically shuts off.

The maintenance is another big bonus as it has a wide opening, includes a cleaning brush, and has a handle on the water tank.

LEVOIT Humidifiers Specifications

Dimension

14 x 8 x 6 in

Capacity

4L

Recommended Room Size

285-376 ft² / 24-35 m²

Playtime

40 Hours

Highlight Features

Up to 40 hours of runtime

A coverage of 285 to 376 square feet

360-degree mist nozzles

A wide opening includes a cleaning brush and has a handle on the water tank

Verdict

Offering a maximum runtime of nearly two days, the LEVOIT bottom-fill humidifier is perfect for anyone looking for a consistent performer.

Best Overall (Top Fill Humidifier): GENIANI Top Fill Cool Mist Humidifier

GENIANI Top Fill Cool Mist Humidifier
GENIANI Top Fill Cool Mist Humidifier
9.4Outstanding
Pros
  • Look modern and simple
  • Easy to use – three-speed settings, smart mist adjustment, and a built-in humidity sensor
  • Multiuse, you can use it as a humidifier and an essential oil diffuser - the added oil tray
  • Safe and high-quality – made of BPA-free plastics
Cons
  • The essential oil part could work better

We’re completely blown away by the beauty of this top-fill humidifier. It looks simple, modern, and is very easy to use.

Using smart mist adjustment with a built-in humidity sensor, it gives you three manual speed settings. A big plus is you can use it as an essential oil diffuser, thanks to the added oil tray on the back of the design.

We also love that it’s designed with safety in mind by using only BPA-free plastic, which is safe for both humans and plants.

The optional LED nightlight and whisper-quiet operation allow it to be used at night, near your bedroom without interrupting your sleep. And once the water level is low, it will automatically shut off to prevent overheating and burning.

GENIANI Top Fill Cool Mist Humidifier Specifications

Dimension

12.5 x 9.4 x 6.8 inches

Capacity

4L

Recommended Room Size

220 sq. ft.

Playtime

18 hours

Highlight Features

Three-speed settings, smart mist adjustment, and a built-in humidity sensor

An oil tray

Made of BPA-free plastics

Optional LED nightlight

Verdict

GENIANI Top Fill Cool Mist Humidifier is the best overall out of many other top-fill humidifiers we’ve tested, thanks to its impressive design.

Best For Large Rooms (Top Fill Humidifier): Miroco Cool Mist Humidifier, 26dB Ultra Quiet, 6L top filling

Miroco Cool Mist Humidifier, 26dB Ultra Quiet, 6L top filling
Miroco Cool Mist Humidifier, 26dB Ultra Quiet, 6L top filling
9.2Outstanding
Pros
  • Ideal for big rooms – recommended for room sizes of 215 to 430 square feet
  • Effortless to use – a 6-liter water tank and a runtime of up to 60 hours
  • Easy to refill/clean – 90mm water inlet
Cons
  • The water gauge is hard to see
  • Wish the power cord was detachable for easier maintenance

It’s hard to believe that this compact and noiseless Miroco Cool Mist Humidifier can hold humidity for space up to 430 square feet with no sweat.

It’s also able to keep running for 20 to 60 hours on a full tank of 1.6 gallons (equivalent to 6 liters). Meanwhile, the operation noise is just 26 decibels, much quieter than a library. Combined with an optional nightlight, it will never stop your sleep.

If you’re wondering about its maintenance, rest assured, this task is effortless and there won’t be any spill when filling, all thanks to the 90mm water inlet.

Miroco Cool Mist Humidifier, 26dB Ultra Quiet, 6L top filling Specifications

Dimension

10.24 x 7.01 x 16.34 inches

Capacity

6L

Recommended Room Size

20-40 m² / 215-430 ft²

Playtime

20-60 Hours

Highlight Features

Recommended for room sizes of 215 to 430 square feet

A 6-liter water tank and a runtime of up to 60 hours

90mm water inlet

Verdict

All-in-all, the Miroco is our proud choice for people who are in need of a quiet yet functional humidifier that can work well on extra-large areas.

Best For Rapid Humidification Effect (Top Fill Humidifier): Kealive 30-Hour Cool Mist Humidifier

Kealive 30-Hour Cool Mist Humidifier
Kealive 30-Hour Cool Mist Humidifier
9Outstanding
Pros
  • Perfect for large rooms – coverage of 107 to 376 square feet
  • Offer instant humidification effect – mist output of 180ml/hour
  • Easy to adjust the mist direction - 360-degree nozzles
  • Durable and look like new – stain-resistant nano-coating
Cons
  • Feature just one dial for adjustment
  • The water filling hole is quite small
  • There’s not much difference between three settings

For a space area of 107 to 376 square feet, this is a shining candidate.

It has a 2.7-liter water reservoir that can run continuously up to 30 hours depending on the setting you choose to run it. Meanwhile, you hardly hear any sound while it’s running as the maximum noise level of this machine is only 28 decibels. Incredible!

The biggest selling point is its mist output – 180ml/hour as maximum, which means if you want something that can offer instant humidification effects, this is it.

A bit plus is it utilizes 360-degree nozzles so you don’t have to move the entire machine whenever wanting to adjust the mist direction. Besides, the nano-coating enhances its durability and stain resistance to the extreme, keeping it as clean as new.

Kealive 30-Hour Cool Mist Humidifier Specifications

Dimension

6.7 x 6.7 x 11.8 inches

Capacity

2.7L/0.7G

Recommended Room Size

107-376 Ft²

Playtime

30-Hour

Highlight Features

Coverage of 107 to 376 square feet

Mist output of 180ml/hour

360-degree nozzles

Stain-resistant nano-coating

Verdict

For those who are looking for the best plant humidifier for the rapid humidification effect, you’ll never go wrong with the Kealive.

How To Choose The Best Plant Humidifier?

Types

There are three types of humidifiers for you to choose from:

  • Warm mist humidifiers: this type works by heating up the water, making it evaporate. The vapor is then sent to the air to increase the humidity level of the surrounding area.

  • Evaporative humidifiers: these generate vapor using airflow. They draw water from the tank over a wicking material.

  • Ultrasonic humidifiers: this type increases the evaporation rate in the tank using vibrations. It generates the finest mist.

Grow Room Size

While most plants need at least 60% of humidity level, desert plants require 40% or higher. With that in mind, you should maintain a humidity level between 50 and 60 percent.

If your grow room is 300 square feet, you only need a small humidifier. If it’s from 300 to 499 square feet, you should get a medium-sized machine. And if the room size exceeds 500 square feet, you will need a large humidifier.

Water Tank Size

The size of the water tank, ranging from 0.4 to 6 gallons, is directly related to how often you have to replace the water. Therefore, you should choose a humidifier with a large tank so you won’t have to do the job too frequently.

Runtime

The ideal runtime for a humidifier is 24 hours, or you can choose a machine with 12 hours of runtime.

Which Brands Make The Best Plant Humidifier?

TaoTronics

If you are seeking a smart humidifier, this is your go-to brand. High-end smart products are a great strength of this brand, which also offers ease of use for you.

GENIANI

This brand has built a solid reputation for its experience in the industry. Here, you will find products with modern designs and unique technologies.

Miroco

This brand takes pride in making small appliances, so it’s suitable for those who want a small-sized humidifier.

FAQs

What kind of humidifier is best for plants?

All types of humidifiers increase the humidity level for plants, so there’s not really the best type. The choice of the type of humidifier comes down to your own preference.

Where should I put my humidifier for my plants?

A distance of 4 to 6 feet is a safe distance between the humidifier and the plants. You shouldn’t put the humidifier too close to the plants or they will suffer from drought.

Should I get a humidifier for my plants?

Yes, of course, if you plant them indoors. This is important because the plants need sufficient humidity to live and grow.

Do plants like warm or cool humidifiers?

This depends on the weather/climate condition. If you are planting them in a cold environment, the warm mist is better, and vice versa, the cold mist is better for plants in hot weather.

Can you use tap water in humidifiers?

You shouldn’t use tap water for humidifiers as it contains minerals that can result in deposits in the humidifier. Instead, use demineralized or distilled water.

Conclusion

We hope that by now, you know what to look for in the best plant humidifier. Keep in mind that the perfect product must meet your needs, and in this case, your plants’ needs. So always consider the factors based on your own indoor garden. Good luck!

Harry Ramos
Harry Ramos

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