This is our buying guide on the best humidifiers for growing weed in 2023. Below is a quick summary of our top recommendations. Scroll further down to read our in depth, hands on reviews, for each humidifier.
Pure Guardian Humidifier for Weed
- 1 gallon water tank
- 320 sq-ft coverage
- 54 hour runtime
- 3 mist speed settings
- Silver Clean lining inside water tank
- Prevents mold and mildew
- LED night light
- Essential oil tray
- Adjustable mist nozzle
- Budget-friendly
Crane Humidifier for Growing Weed
- 1 gallon water tank
- Easy to refill and clean
- Can run up to 18 hours on one tank
- Can cover up to 500 sq-ft of space
- Fully adjustable mist volume
- 360 degree adjustable mist nozzle
- Filter free design
- Less maintenance required
- Optional demineralization filter for hard water
Levoit Humidifier for Growing Weed
- 6 liter water tank
- 60 hour runtime
- Can cover over 500 sq-ft of space
- 300 ml/hr maximum mist volume
- Customizable mist volume
- Large knob for adjusting the mist volume
- Provides a wide range of adjustment
- 360 degree adjustable mist nozzle
- Can direct mist to any spot in a room
- Integrated gran handles
- Make it easier to move this large humidifier
- Easier to clean
- See-through water tank
- Lets you notice any mineral deposits more quickly
- Surprisingly quiet for such a large humidifier
- Best easy to clean humidifier
This article talks about the best humidifiers for growing weed.
Marijuana has very specific humidity needs. In fact, marijuana plants at different stages of their growth cycle require varying levels of moisture in the air to stay healthy and grow.
If you have an indoor weed growing operation, such as a weed grow tent or room, in an area with very low relative humidity, you need a humidifier to effectively regulate the relative humidity.
And when it comes to humidifiers for growing weed, we think Crane’s unit is easily the best one we’ve seen. This unit has a larger water tank than most, which enables longer runtime and higher coverage for larger grow tents and rooms.
We’ve been researching and reviewing humidifiers for a couple years now. Our experience in the field allows us to make better recommendations, which in turn help you make a more informed purchase.
Keep reading for more of our thoughts on the best humidifiers for weed.
Crane Humidifier for Growing Weed
BEST OVERALL
At A Glance
Crane’s humidifier for growing weed is the complete package. It has a decent-sized water tank, the runtime is longer than most, and you get fully adjustable settings. These are particularly important for growing weed, since you’ll need varying levels of humidity at different stages.
Design
The design of Crane’s humidifier for growing weed blends aesthetics and functionality. The teardrop design looks attractive, but also integrates a handle that makes the whole unit a lot easier to place and move around a space.
We’ll talk about it in more depth below, but the unique design of the water tank enables faster cleaning and refilling.
This unit has a detachable power cord, which has a couple benefits. For one, in the event that the power cord is damaged, you can quickly source a new one. And it’s much easier to move the unit around a space without a cable.
And lastly, we liked the easy-to-use controls up front, which offer a lot of adjustability.
Water Tank Capacity
The water tank comes in at just under 1 gallon. That’s on the high end for a weed growing humidifier of this size, and we have no doubt that the unique design of the water tank is to thank for the impressive packaging.
We can attest to simpler, quicker dismantling of the unit for cleaning and refilling the water tank. The opening for the water tank at the bottom is wider, which helps fill the tank without spilling water all over the place.
Weed growing enthusiasts should appreciate this, since spilled water could cause excess humidity in an enclosed weed grow tent or grow room, which might do more harm than good.
Runtime
A 1 gallon tank means this humidifier for growing weed can run for a lot longer on a full tank. It is rated to run for around 24 hours on regular settings, though we found that it can only manage about 18 or so before giving out.
Still, that should suffice for most of your weed grow tent/room humidifying needs. Not to mention, the ease of refilling means we never really felt the runtime lacking.
Coverage
Crane covered all of their bases, and the coverage rating this unit offers is no different. It can cover up to 500 sq-ft of space, making it perfect for even the largest of weed grow tents or even larger grow rooms.
Mist Volume
The mist volume of this humidifier is fully adjustable, via the large control knob up front. Unlike lesser humidifiers, this one offers a lot of adjustment, and the sensitive control knob allows you to get the mist volume just right.
Adjustable mist volume is pretty much non-negotiable in a humidifier for growing weed, since you’ll need to periodically change it for optimal plant growth.
Noise Levels
If you’re running an indoor weed grow op, you might be looking to keep it under wraps. And to that end, the whisper-quiet operation of Crane’s humidifier is an absolute godsend. Even at the higher mist volume settings, there is virtually no noise or sound from this humidifier.
Special Features
While you don’t get a ton of bells and whistles with this humidifier for growing weed, it still has a couple cool tricks up its sleeve.
For one, the mist nozzle is fully adjustable, which we found to be really helpful for directing mist to a specific spot in the room.
The unit has a filter-free design, which means less maintenance. However, if you want, you can get an optional demineralization filter for hard water.
This is forward thinking on Crane’s part, as very low humidity tends to be a by-product of extremely cold weather and high altitude, where hard water is more prevalent.
We recommend against using hard water in your humidifier for growing weed, since doing so can easily lead to mineral build up or mold. This in turn can ruin your crop.
But if you don’t have a choice, this demineralization filter provides a convenient workaround.
Who’s It For?
We think the Crane humidifier for growing weed is for the person who needs a high performance humidifier that also offers a ton of adjustability. It is a reliable unit, has all the stuff you actually need, and none of the useless extras.
Pros
- 1 gallon water tank
- Easy to refill and clean
- Can run up to 18 hours on one tank
- Can cover up to 500 sq-ft of space
- Fully adjustable mist volume
- 360 degree adjustable mist nozzle
- Filter free design
- Less maintenance required
- Optional demineralization filter for hard water
Cons
- Not a ton of special features
Pure Guardian Humidifier for Growing Weed
BEST BUDGET
At A Glance
The Pure Guardian humidifier for growing weed brings a lot of premium features down to a more manageable price point. It might lack some of the performance of our top pick, but it actually improves upon some others.
Design
This humidifier for growing weed is made of high-quality plastic, making for a pretty durable, long-lasting package. The whole unit is taller and narrower than other humidifiers we’ve tested, helping it slide right into tight spots.
We found this to be really useful for smaller weed grow tents, where space is limited.
There aren’t a ton of controls for you to worry about, and the few buttons that control power and the integrated lights are laid out ergonomically.
Water Tank Capacity
One area where the Pure Guardian blasts past its budget-friendly competitors is the size of the water tank. This humidifier has a large, 1 gallon water tank for better runtime and coverage.
Here, Pure Gaurdian lined the water tank with something they call Silver Clean. This special lining on the inside of the tank discourages the growth of mold and mildew.
This is a unique feature that comes in handy for weed grow tents and rooms, where even a little bit of mold could spell disaster for your entire crop.
Runtime
Runtime is quoted at a staggering 70 hours. However, we suspect this number was measured in absolutely ideal conditions with low mist settings, as we were only able to achieve around 54 hours with regular mist volume settings, running the unit in a humid environment.
Still, 54 hours is quite long, and deserves praise.
Mist Volume
One way Pure Guardian was able to achieve such a high runtime is by lowering the mist volume on all settings. That’s actually one of our gripes with this humidifier for growing weed.
That means, even on higher mist volume settings, it’s not really the most effective at humidifying larger spaces quickly. To be fair, it’ll get the job done, just a lot slower than some other units we tested.
You do get 3 different mist speed settings, so feel free to mess around with them and find one that works for you.
Coverage
But this humidifier doesn’t like staying down for very long, coming right back with a coverage rating of around 320 sq-ft. That might not be quite as high as our top pick, but allows you to humidify even the largest of large weed grow tents and rooms.
Noise Levels
Noise levels are on the higher end, but still within normal ranges. Running this humidifier won’t wake up the neighbors, nor will it prevent you from having a conversation at normal volume.
Special Features
This is one of the few humidifiers for growing weed we tested that has an essential oil tray. While you probably shouldn’t diffuse essential oils in your weed grow room or tent, it is a cool feature to have if you plan on using the humidifier around the house.
The integrated nightlight is another nice touch, as is the indicator light that lets you know when the tank has run out of water and needs to be refilled.
This ultrasonic humidifier automatically turns off when the water tank runs out, safeguarding the internal components from harm.
And lastly, this unit has an adjustable mist nozzle, allowing you to direct the mist wherever you need it to go in your weed grow tent or room.
Who’s It For?
Pure Guardian’s weed growing humidifier is for the person who doesn’t want to spend an arm and a leg on a humidifier unit. It has one of the highest runtimes we tested, and offers decent coverage, all at a lower price compared to other units.
Pros
- 1 gallon water tank
- 320 sq-ft coverage
- 54 hour runtime
- 3 mist speed settings
- Silver Clean lining inside water tank
- Prevents mold and mildew
- LED night light
- Essential oil tray
- Adjustable mist nozzle
- Budget-friendly
Cons
- Mist volume could have been higher
Levoit Humidifier for Growing Weed
BEST PREMIUM
At A Glance
Levoit’s humidifier is the humidifier you only have to buy once. It offers higher build quality and better longevity, alongside impressive performance, and some unique features you won’t find anywhere else.
Design
Levoit takes a different approach to the design of this humidifier. It has a large, fully see-through water tank that lets you keep an eye out for any build up or mold that could harm your weed grow op.
You also get a digital display on this humidifier that tells you all of the most important info you need. The control array is more comprehensive than the ones we see on other humidifiers, giving you more customization options.
Even refilling the tank is made easier thanks to the convenient top-fill design that prevents spills.
Water Tank Capacity
Speaking of that water tank, it measures in at an astounding 1.5 gallons. You might think that the larger tank is harder to clean, but it is surprisingly easy. It is a cinch to take the whole thing apart and clean or descale it regularly.
Runtime
As the old saying goes, ‘there’s no replacement for displacement’, and the Levoit humidifier for growing weed proves it.
That massive 1.5 gallon water tank gives this humidifier a runtime of 60 hours.
And unlike the others that need ideal conditions and low mist settings to achieve that number, the Levoit humidifier for growing weed can give you almost 60 hours, even on higher mist volume settings.
Coverage
The coverage rating is also in line with other high-performance humidifiers for growing weed.
This unit is rated to cover just over 500 sq-ft. So no matter the size of your weed grow op, this Levoit can easily handle the task of humidifying it.
And once again, the higher coverage rating means you can also use this humidifier in larger spaces like bedrooms, living rooms, hallways, and the like.
Mist Volume
Levoit’s humidifier for growing weed is capable of providing mist volume upto 500 ml/hr. Put simply, that is miles ahead of the other units on this, and most other lists.
The result of such high mist volume is effortless humidification of a space. It is also faster than any other unit we’ve come across, and offers more consistent humidification of even larger spaces.
And the coolest part is that this unit gives you complete control over the mist volume, so you can turn it down to get even better runtime, or regulate the humidity at your preferred level.
Noise Levels
The larger size and higher performance do have the side effect of making this humidifier slightly louder when it’s pushed to the limit.
This is only really a problem when you crank the mist volume and fan speed to their highest settings, and even then, all you get is a dull hum. For general use, this ultrasonic humidifier for growing weed is as quiet as they come.
Special Features
But the Levoit humidifier for growing weed is just getting started. It also has a long list of useful features that put every other humidifier we tested to shame.
This is the only truly ‘smart’ humidifier on our list. While others are patting themselves on the back for including an auto-shutdown feature, Levoit is offering features like automatic humidity control, app integration, voice control, and smart home integration.
You can even schedule times for this humidifier to automatically turn on or off, which is one less step in the weed growing process for you to worry about.
Not to be outdone by our top budget pick, Levoit also outfitted this humidifier with an essential oil tray, and even supplied aroma pads for you to try. Again, this feature is more for when you’re using the humidifier outside the grow room, but it deserves to be mentioned.
Who’s It For?
This Levoit humidifier for growing weed is for the person who needs high performance and reliability, but also requires smart features that let you control the humidifier straight from your phone. Or with your voice. Or with the included controls!
Pros
- 6 liter water tank
- 60 hour runtime
- Can cover over 500 sq-ft of space
- 300 ml/hr maximum mist volume
- Customizable mist volume
- Large knob for adjusting the mist volume
- Provides a wide range of adjustment
- 360 degree adjustable mist nozzle
- Can direct mist to any spot in a room
- Integrated gran handles
- Make it easier to move this large humidifier
- Easier to clean
- See-through water tank
- Lets you notice any mineral deposits more quickly
- Surprisingly quiet for such a large humidifier
- Best easy to clean humidifier
Cons
- Large size may prevent placement in smaller weed grow rooms and tents
