How much humidity should be in a grow tent? Guide for Beginners 2021

If you have a collection of tropical plants that thrive in high humidity in your marijuana grow tent, you might be wondering what the most effective way to increase the moisture levels in your air is. While there are a handful of ways to increase humidity, hands down, the most effective way to consistently maintain a higher level of humidity is with an electric Best Humidifier For Grow Tent .

What Does A Humidifier Do?

First thing first, humidifiers have the important capacity of increasing the moisture count in any given area by providing the air with water vapor. This can be in the form of either cool mist or hot mist. And the choice between these two types will decide whether a humidifier would increase or decrease the temperature. By the way, if you also need a best light, ECO Farm LED grow light can be your great choice.

UNDERSTANDING RELATIVE HUMIDITY

When we talk about the perfect humidity for any plant, it’s important to realize that we’re talking about “relative humidity.” This is a complex term, so we’ll try to explain it in the simplest terms possible.

Humidity simply refers to the amount of water vapor in the air. However, it’s critical to note that the amount of water the air can hold depends on temperature. Hot air can naturally hold more moisture than cold air.

Relative humidity is simply a term that refers to the amount of water air can hold at a given temperature.

Once relative humidity levels reach over 100%, the surplus of water can no longer be held by the air and will condensate into water droplets, such as fog, morning dew, or rain.

Let’s imagine the temperature in your grow room is 30°C (86°F) with a relative humidity (RH) of 33%. If you were to rapidly cool down the environment to 10°C (51°F), the RH would rise to 100% (also known as the Dew Point). Should you reduce the temperature further, the water in the air would begin to condensate.

WHAT IS THE IDEAL RELATIVE HUMIDITY FOR CANNABIS?

The ideal relative humidity level for plants vary. Plants native to hot, tropical areas are well-adapted to these temperatures and will grow best at higher RH levels than plants from colder, more temperate climates, for example.

History suggests that cannabis is native to various parts of the world. Indica varieties seem to originate and grow best in drier, mountainous regions and can also deal with lower temperatures. Sativa varieties, on the other hand, tend to grow naturally in warm, subtropical climates, and prefer warmer, more humid conditions.

Since cannabis varieties have been heavily crossbred, most of the strains bought through seedbanks are some kind of indica-sativa hybrid. Hence, it’s not enough to simply “guess” what the ideal humidity level might be for a particular strain based on its genetics. Instead, most growers will assess their plants and their morphology, and experiment with RH levels to find that sweet spot for each grow.

Nonetheless, there are some basic “rules of thumb” you can follow:

• Seedlings and clones like RH levels of 65–80%. Remember, these young, fragile plants have weak root systems. By increasing humidity levels, you’ll allow them to take up more water from the environment and focus on developing strong roots. At this early stage, you’ll want to keep temperature levels at around 25°C during the day, and around 21°C at night (77°F and 70°F, respectively).

• Vegetative plants, on the other hand, tend to prefer moderate humidity levels. There’s no exact figure to follow here, but you’ll want to stick somewhere between 55–70% depending on the strain. Temperatures should sit between 22–28°C (71–82°F) during the day and roughly 18–24°C (64–75°F) at night. Vegetative plants have strong root systems and will absorb more water from the soil, which is why most growers drop humidity levels slightly during this stage.

• At the early flowering stage, most growers agree that plants benefit from lower humidity levels. Again, there’s no ideal figure to aim for, but many will stick between 40–50%, occasionally pushing to roughly 55%. You’ll also want to drop temperatures to about 20–26°C (68–78°F).

• During the late flowering stage, try to drop humidity to about 30–40% and keep temperatures around 18–24°C (64–75°F) during the day, followed by slightly cooler nights (16-20C in the last few nights).

Remember, the figures listed here are guidelines. There’s no shortage of growers who’ll tell you they achieve great results with high humidity levels, especially during the flowering stage.

A best recommend: ECO Farm Hydroponics 8L Capacity Humidifier

• NO NOISE - JUST FRESH AIR. Geniani humidifiers fills your room or office with clean and fresh air and makes your work and daily activities much more pleasant and efficient.

• LARGE WATER TANK. Even a large room or office (on the high mist setting) will be full of fresh and clean air for 12 hours. If you have a smaller room (on the low setting), 8 liters is enough to produce air moisture up to 24 hours.

• NIGHTLIGHT FOR BETTER SLEEP. Geniani cool mist humidifier helps you have a better relax at night with the soft light.

• AUTOMATICALLY TURNS OFF. If during the night a humidifier happens to be out of the water, you can sleep tight - it automatically shuts down and turns on after you refill it.

• 360-DEGREE MIST NOZZLE. It helps you decide in which direction you would like the moisturized air to be spreaded.

Final Words

You want your grow room humid, but not wet because standing water should never be in your grow. Therefore, choose a good quality humidifier that will disperse a fine misty spray. But, there are other humidifier features you have to consider.

We found out that it is extremely important to match the size of the humidifier to the size of your room.

There is no doubt that a bigger humidifier may instill excess humidity in your grow room, causing condensation as well as bacterial growth. Overall, choose a Best Humidifier For Indoor Plant that is easy to operate and maintain.