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The Importance of Humidity

Gardening Tips

Humidity is one of the things that most indoor growers often forget about even though that its brother, temperature, is often remembered. These two things are actually quite interconnected with each other as one will affect the other. This makes it quite surprising that some growers, even the seasoned ones, forgets everything about humidity in an indoor grow room.


It’s true that there are a lot of things that are important to remember in creating an indoor grow room, humidity being one of them. The reason for this is that the humidity in the environment of the plant can heavily affect the outcome of your crops! Did you know that plants actually slows down their growth if it’s too humid in a room? A slow-growing plant will not only delay everything, it will also give a yield that is not satisfactory. Of course, you would not want that to happen. This is why remembering humidity is very important.
In order to remember humidity better, you should understand first on how it can affect your plants. As stated above, one negative effect of a very humid environment is that it will slow down the growth of your plants. Naturally, the next question you may ask might be “how do I know if the environment's too humid?”. To answer this question, you will need to use a hygrometer or a humidistat. A hygrometer or a humidistat measures the humidity inside a grow room. With a tool like this, you can now monitor the humidity in a room. In general, most plants can withstand a humidity level of around 30%-55% while the healthiest or ideal range should be at 40%-45%. Humidity that goes above 60% will increase the chances of mildews, molds and other unwelcome pests to appear on your crops. Additionally, plants take in lower CO­2 which will slow down the overall growth of the plant. On the other hand, low humidity is also bad for your plants. Any plants that live in an environment below 30% will reduce their transpiration abilities (it will choke them) which will also slow down their growth. This means that you better watch out the humidity levels!


Now that you know that humidity can cause real problems for a grower, the next thing that’s probably on your mind is how to remedy it. To make it a lot simpler for you, here’s a list of what you can do to take care of the humidity issue:


1. Invest in a Humidifier or a Dehumidifier
You can opt to invest in a humidifier for your humidity needs. A humidifier simply raises the humidity in an enclosure. As you can imagine, this can be very useful if you are lacking in humidity! Similarly, you can invest on a dehumidifier if your plants experience a very humid environment.


2. Secure a Proper Ventilation System
A proper ventilation system can go a long way in removing the humidity problem. It’s actually considered to be the most practical solutions. With playing around the amount of air that can go in and out of a room, you can either increase or decrease the amount of humidity inside that enclosure. This can be done through using a can-styled exhaust fan.


3. Rearrange or Cut down the Plants
Believe it or not, the plants themselves can cause changes to the humidity level in an enclosure. Big crowded plants tend to displace air which ruins the ventilation system. Removing some unwanted parts of the plant or rearranging them better can be a solution to your humidity problem.


4. Temperature Control
As stated above, the temperature is intertwined with humidity. If your enclosure is too hot or too cold, it will affect the humidity. In general, if the temperature drops but the water vapor content stays the same, the relative humidity goes up. However, if the temperature rises while the water vapor content stays unchanged, the relative humidity goes. The reason behind this is that colder air requires less moisture to become saturated compared to warmer air!


5. The Humidity Dome
Young seedlings or cuttings requires a very high level of humidity to encourage root growth. They actually require around 80%-90% of humidity for their initial root growth. In order to provide this for them, a humidity dome can be used.


To conclude, we all want the best for our plants. Neglecting or forgetting about humidity is a big mistake that growers tend to commit. Now that you know better, be sure to remember humidity when planning your next indoor grow room to ensure a sizeable yield!



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