How much THC is present in a cannabis plant is genetically determined in its genome. However, in order to achieve maximum THC results, the growing conditions must also be right. It is not only the plant phenotype that determines the THC content, but also the environment and care. It is important that growers pay attention to a stable ambient temperature. If the plant is exposed to strong temperature fluctuations, this slows down its development. Likewise, too much humidity should be avoided, as this could cause bud rot. Meanwhile, an indoor LED grow light with added UVB light will increase the THC content.