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Ideal Temperature and Humidity For Marijuana Plants - 420 Beginners' Guide Growing cannabis in a cannabis grow tent is an excellent way for growers to produce maximum yields, create an extremely high-quality product, and secure against theft or interlopers without cutting off access to the benefits of growing outdoors. For both experienced and brand-new cannabis growers, a cannabis greenhouse offers the chance to provide cannabis plants with the ideal environment to produce the perfect grow. Here’s a look at just what a greenhouse can bring to your cannabis crops. How Humidity Affects Marijuana Plants? Like most plants, marijuana takes in water from its roots and leaves. The higher the humidity, the more water marijuana plants absorb through their leaves and the less water is absorbed through the roots. In low humidity environments marijuana plants will absorb more water through their roots and less through their leaves. Why does this matter? Growers infuse the water with critical nutrients that will be absorbed through the plant’s roots. If the humidity level is too high, the plants will not get enough of these nutrients. Certain diseases, such as white powdery mildew and bud rot, are also more likely to strike the leafy plants in high humidity conditions. But, if the humidity level is too low, the plants will absorb too many nutrients which will harm their growth. Additionally, marijuana plants need different levels of humidity during different stages. Proper humidity control is one of the most important aspects in raising a healthy crop as quickly as possible. The general rule of thumb is that younger marijuana plants do best with high humidity and more mature plants need lower humidity levels. Here is a general reference chart for humidity levels, but please note that specific strains may have different needs:    

Clone stage needs 70-80% humidity Vegetative stage needs 40-60% humidity Flowering stage needs 40-50% humidity Final weeks of flowering less than 40% humidity 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 70-85 °F (20-30 °C) range during the day when lights are on. When lights are off (or at night), cannabis plants are happy with slightly cooler temps. Temperature’s effect on plants


Plants are fairly self-sufficient, but when it comes to temperature they are at a disadvantage. Even though it is vital to their health, plants can’t create their own heat. Unlike animals and humans, a marijuana plant is entirely dependent on its environment. How does a plant get warm? A plant’s temperature develops from a combination of external light, external temperature, and the amount of evaporation. A plant’s exact temperature is not something you can read on a thermometer, but it is a definite measure of health. Marijuana plants won’t usually die from being too hot, but their growth can slow from it. High external temperatures (above 80 degrees) while flowering will not only slow down bud growth but also reduce their smell and potency. If you care about growing buds with plenty of cannabinoids, you need to be sure the external temperature is kept under control during the flowering stage. Optimal Temps For Growing Cannabis   

Optimal temperature for growing cannabis - Vegetative Stage is 70-85°F (20-30°C) - Flowering Stage is 65-80°F (18-26°C) Vegetative Stage: Young growing cannabis plants in the vegetative stage prefer temps a bit warmer than in the flowering stage, in the 70-85°F (20-30°C) range. Flowering Stage: In the flowering stage (when cannabis plants start making buds), it’s best to keep temps slightly cooler, around 65-80°F (18-26°C) to produce the best color, trichome production and smell. There should be a 10 degree difference between night and day temps for the best results (this is especially important in the flowering stage for highest quality bud development). WAYS TO LOWER HUMIDITY

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Run your existing tube vent on higher velocities or upgrade your air flow fans. This applies to both air exits in tents and the room it is placed in! Increase fresh/cool air supply. Try to water your plants right after lights are switched on. The room will be cooler at that time and the immediate absorption will result in less overall humidity. The most consistent option will be: Invest in a decent sized dehumidifier–small humidifiers don’t have large enough tanks to keep up with the demand. WAYS TO LOWER TEMPERATURES

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Increase the total airflow and air exchange in your growing room A simple trick: “lights off” during the day -- “lights on” at night When you grow with High Pressure Sodium lights (HPS), consider using a cool tube Install an air conditioning unit (AC’s will also lower humidity levels)


RAISING HUMIDITY    

You can temporarily increase humidity levels by misting with a spray bottle Keep the surface of the soil moist, but not wet Hang wet towels/cloths in your grow room or put open water containers in it The most consistent option will be: Invest in a humidifier with a large water reservoir (the need for constant refills makes smaller ones inefficient) RAISING TEMPERATURES

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Upgrade to a bigger grow light (more watts = more heat) Place a heating mat at the bottom of your grow tent or grow room Use a simple space heater with a reliable thermostat Final Thoughts There you have it folks, literally everything you need to know about the best temperature for growing marijuana, as well as humidity levels. As long as you keep all of these things in mind which we have covered here today, you should have no problems achieving and maintaining the proper humidity and temperature levels in your cannabis grow tents.

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Ideal Temperature and Humidity For Marijuana Plants - 420 Beginners' Guide  

Growing cannabis in a cannabis grow tent is an excellent way for growers to produce maximum yields, create an extremely high-quality product...

Ideal Temperature and Humidity For Marijuana Plants - 420 Beginners' Guide  

Growing cannabis in a cannabis grow tent is an excellent way for growers to produce maximum yields, create an extremely high-quality product...

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