Temperature Control

Growing cannabis has multiple ways to be done. With that being said, there are multiple ways to either help the growing process or hurt the process. Unlike animals and humans, a marijuana plant is entirely dependent on its environment. Marijuana plants won't usually die from being too hot, but their growth can slow from it. Like all plants, cannabis likes comfortable temperatures. For most grows, the ideal temperature range is between 65-80°F (18-26°C). Keeping temperatures within this range helps maximize plant growth and development and contributes to large and healthy buds.

There are many types of temperature controllers growers can use to control their environment. The most common of which are HVAC systems, air conditioners, heat pumps, high-velocity fans, and heating pipes carrying heated or chilled water. Temperature control is one of the most basic aspects of controlled environment cultivation. It also affects and is affected by other parameters, such as lighting and humidity. This is why temperature control is at the center of most grow room climate control systems. Temperature and humidity are especially closely tied, directly affecting each other. So it’s virtually impossible to discuss temperature control without considering humidity. 

While the ideal humidity range plays a major impact on development, it’s not the only reason to control humidity. Perhaps the biggest issue with humidity is mold. The most common of which are bud rot (also known as gray mold or botrytis) and powdery mildew. This mildew can devastate any cannabis grow or stop the whole operation itself. This would cost the grower time and money trying to scrub and disinfect all areas to ensure there are no more spores. Given the right conditions, they can spread rapidly, infecting large amounts of plants. Once infected with these fungal diseases, plants will grow slower, and may eventually shrivel and die.

However, when it comes to cannabis, preventing molds is even more crucial. The cannabis industry has strict regulations, both for medical and recreational products. So growers are extremely limited in the amount and types of sprays they can use to combat these diseases. On the other hand, there are strict limitations on the presence of molds. So cannabis growers are left with one option – to prevent molds from developing in the first place. Luckily, these diseases can’t develop in any situation. They require high humidity or even dew point condensation to do so. If you can successfully limit humidity levels at all times, they won’t be able to develop or spread at all.