Where should a humidifier be placed in a grow tent? 2021

You need a Best Humidifier for Indoor Plant. Humidity can affect the growth of indoor plants depending on its level. It is very crucial to keep it at the recommended level to ensure your plants bloom. Plants need different quantities of humidity depending on the growth stage. For example, seedlings need a strict range or humidity, unlike grown plants which can resist a wider range.

For plants in the vegetative stage, 45% to 55% of humidity is ideal for growth. In the flowering stage, plants need a range of 35% to 45%. You can even lower it to 30%. Plants can survive between 3-55% of humidity. However, the ideal range is between 40% and 45%.

Humidity is an important topic for cannabis growers. But why is humidity so important for cannabis plants, and what are the ideal humidity levels to maintain in your marijuana grow tent?

To better understand why humidity is important to plants, it helps to think about how plants absorb air from the environment. Remember, all plants respire carbon dioxide from the environment through their leaves. In doing so, they naturally lose some of the water retained in their foliage.

Dry air causes plants to lose more water when respiring than moist air, and hence, drives down the overall moisture content in the plant more quickly. Once the environment becomes too dry, plants lose more water than they are able to regain via their roots.

When this happens, plants will almost entirely close the pores in their leaves in order to minimize moisture loss. This works, of course, but also means the plants receive less carbon dioxide from the environment. This causes cell death within the plants and leaves them looking limp and ill.

Ideal grow tent temperature and humidity levels can vary depending on the plant you’re growing, but we generally suggest keeping a grow tent within these ranges:

Temperature: 62°F (17°C) – 87°F (31°C)
Humidity: 40 – 70%
This is the ideal range for both temperature and humidity, and if your levels fall outside of those ranges, you may want to look at buying something to adjust that.

Do I need a humidifier or dehumidifier in my grow tent?
First check your current humidity level in your tent using a hygrometer, which is an indoor humidity monitor. If your humidity is lower than 40%, you may want to buy a humidifier. Inversely, if your humidity is over 70%, you may want to look at buying a dehumidifier.
What is the Optimal Humidity for a Cannabis Grow?

Plants have different needs at each stage of the growing cycle, so to keep it simple, we’ve organized the grow stages into four parts and each one is defined below. Tomasini said this, generally, is what optimal grow room humidity looks like at each stage:

Clone:
This stage lasts around a week and occurs when clones are cut from the mother plants. Because clones don’t have roots, their only method of obtaining moisture is through their leaves, so they thrive in high humidity of 80 to 100 percent. Once roots are formed, humidity can be lowered to 60 to 65 percent. With high humidity, there are no concerns of mold at this point because it can easily be washed or wiped off.
Veg/Vegetation:
The vegetative stage lasts about a month and occurs when the plant is gaining mass and building its immune system and structure. During this stage, you can decipher between male and female plants, and by now the plant has developed a strong root system, which will assist in water and nutrient transfer. Humidity should be around 50 to 70 percent.
Flowering:
Flowering is the final stage of growth and lasts 8 to 12 weeks. Many growers will follow vapor pressure deficit (VPD) guidelines at this point to keep the plants as comfortable as possible. You will begin to see the bud production; growth and humidity should be between 50 and 60 percent.
End of flowering:
By now the plant is likely very large, dense and taking in a lot of water. The value of the plant is at its prime because harvest is near, so most growers go on the defensive at this point and reduce humidity to 40 percent. Lower humidity levels will minimize the development and spread of mold and diseases, which is critical to protecting the health of the buds.
Though optimal humidity alone doesn’t ensure profitable crops, humidity control is a key piece to the puzzle of a successful grow.

If you are a beginner and puzzled with how to choose a humidifier, ECO Farm Humidifiers can be your good choice!

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.

Also, another best choice: Pure Enrichment MistAire Ultrasonic Cool Mist Humidifier

ULTRASONIC COOL MIST TECHNOLOGY: Safely moisturizes the air for up to 16 hours of continuous operation so you can breathe easy and get more restful sleep | High and low speed settings make it easy to adjust mist direction and speed to fit your comfort level
1.5-LITER WATER TANK: Provides ideal coverage for bedrooms, offices, and other medium-sized rooms
OPTIONAL NIGHT LIGHT: Offers soothing glow for maximum relaxation
AUTOMATIC SHUT-OFF: Turns humidifier off when water level is low or the water tank is removed
WHAT YOU GET: Humidifier, AC power adapter, disk cleaning brush, user manual, industry-leading 5 Year Warranty, caring customer support 7 days a week, and the peace of mind that comes from a trusted brand with millions of customers worldwide.

Temperature and How It Relates to Humidity

Temperature and relative humidity are closely related to each other.

Relative humidity is measuring how much water is “being held” in the air compared to the maximum amount of water that can be held at that temperature.

Warm air can “hold onto” more water than cool air. Plants will tend to thrive at different relative humidities depending on the temperature of the air. Once the air becomes too saturated with water, it will tend to form dew or films of water over leaves, which leads to mold.

For those interested in learning more about the science behind this, there is a term used by greenhouse growers known at VPD, or Vapour Pressure Deficit, that roughly measures the temperature and relative humidity.

According to Wikipedia: “the ideal range for VPD in a greenhouse is from 0.45 kPa to 1.25 kPa, ideally sitting at around 0.85 kPa. As a general rule, most plants grow well at VPDs of between 0.8 to 0.95 kPa.”

When growing plants, temperature is just as important as the Relative Humidity (RH) of the air, if not even more so! You need to control both temperature and RH at the same time to get the best results when growing cannabis.

If the air is too hot and dry (high VPD), plants will tend to have stretched growth.
If the air is too cool and humid (low VPD), plants are more prone to problems with mold or fungus.
Here’s what that means to you, the grower:

Cannabis likes a comfortable room temperature, or a little warmer – not too dry, not too humid. For most growers, that is all you need to worry about.

If your grow room feels warm or cold, humid or dry, that is a sign that you may want to look into changing the temperature and/or humidity of your grow area.

Generally, cannabis plants prefer temperatures in the 70-80 °F (21-27 °C) range during the day when lights are on. When lights are off (or at night), cannabis plants are happy with slightly cooler temps.

Final thoughts

Choose the Best Humidifier For Grow Tent according to their needs and your personal preferences. But always be careful to give the best to your indoor plants.