Dealing with Low Humidity During the Vegetative Stage

Greetings, fellow cannabis cultivators!  Ah, the vegetative stage of our favorite green ladies.  Isn’t it glorious watching their leaves spread out like a green carpet unfurling under the sun’s warm glow (or your LED lights)?  But wait, do I spot a wilted leaf? The beginnings of leaf scorch, perhaps?  If your indoor grow room feels…

Dealing with Low Humidity During the Vegetative Stage

Consequences of Low Humidity

Oh, the woes of low humidity! 

In the cannabis world, it’s akin to living on a desert island with nothing but a spoon. 

The fallout can be as dramatic as an episode of a soap opera, and let me assure you, there’s no understudy waiting in the wings if our plants succumb to low humidity.

Consequences of Low Humidity

Effects on Plant Growth

The first sign of low humidity is visible in the leaves. 

It’s like they’ve lost their will to live, wilting and browning as they curl up in sadness

But it’s not just a cosmetic issue, folks. 

Low humidity hinders the plant’s growth, causing it to remain stunted

Imagine being stuck at 4 feet tall, watching all your peers growing skyward, and you can understand the anguish of our plants in low humidity.

The stomata, those tiny pores on the plant’s leaves, close up in low humidity, affecting the transpiration rate. 

This phenomenon is like trying to breathe through a straw while running a marathon! 

Consequently, the poor plant can’t uptake nutrients effectively, leading to deficiencies. 

In other words, your plant starts looking like it’s on a crash diet, all weak and frail, a heartbreaking sight for any cannabis grower.

Increased Risk of Pests and Diseases

Then there’s the issue of pests and diseases. 

Low humidity is the equivalent of laying out a red carpet for these unwelcome guests, including the notorious spider mites and powdery mildew. 

If you’ve ever seen a plant devastated by these pests, you know it’s a sight for sore eyes. 

It’s like your plant hosted a party, only to be left with the aftermath of a rave, trashed and worse for wear.

How to Deal with Low Humidity

Now that we’ve discussed low humidity’s devastating effects let’s get to the solutions. 

After all, we can’t leave our favorite ladies hanging out to dry, literally!

Using Humidifiers

Introducing humidifiers into your grow room is the easiest way to tackle low humidity. 

It’s like having a personal rain cloud for your plants. 

When selecting a humidifier, consider one with a built-in humidistat for easy monitoring. 

Remember, we aim for a light drizzle, not a tropical downpour.

And don’t forget to use filtered or distilled water in your humidifier; tap water is so passé with all its unnecessary minerals.

Using Humidifiers

Implementing Water Trays or Damp Materials

For those with a knack for DIY or working on a tight budget, fret not! 

Simple solutions like water trays and damp materials can also help increase the moisture level in the room. 

Place trays of water around your grow room, and as the water evaporates, it increases humidity. 

Similarly, hanging damp cloths or towels in your room can also help. 

This method is like hanging out your laundry, minus the soap and clothespins.

Managing Ventilation and Airflow

Ventilation and airflow management is another crucial factor in controlling humidity. 

You could install an exhaust fan or oscillating fans to ensure the humidified air is distributed evenly, creating a breezy paradise for your plants. 

Think of this as the air conditioning in your car, controlling the airflow to ensure you don’t end up in a sweaty mess.

Managing Ventilation and Airflow

Utilizing Room Size and Enclosures

Lastly, don’t underestimate the power of your grow room’s size. 

A smaller room can be easier to keep humid, so it’s not always a case of ‘go big or go home.’ 

You could also use enclosures, creating a microclimate, a little biosphere for your plants. 

It’s like creating a mini Amazon rainforest right in your grow room. 

Now who wouldn’t want that?

Consequences of Not Addressing Low Humidity

You might be tempted to let Mother Nature run its course, but let me paint you a picture of what could happen. 

Ignoring the cries for help from your plants can lead to severe consequences, such as reduced yields and, in extreme cases, plant death. 

It’s the equivalent of throwing a party, and no one shows up.


Surviving the desert is tough, but creating a lush oasis for your cannabis plants doesn’t have to be. 

Remember, humidity is a delicate balancing act – too little, and your plants become desert wanderers; too much, and they’re stuck in a constant tropical storm. 

Armed with these tips, you’re ready to take on the role of weather god in your cannabis garden

Let the rains begin!


What happens if humidity is too low during vegetation? 

If humidity is too low during vegetation, plants may experience stress, stunted growth, and increased vulnerability to pests and diseases due to impaired photosynthesis.

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