The growth rate of cannabis plants can vary based on various factors such as the strain, growing conditions, and other environmental factors. However, in general, cannabis plants tend to experience the most growth during the vegetative stage, which typically lasts for around 4-8 weeks.
During this stage, cannabis plants focus on developing their structure and foliage, and they can grow rapidly in the right conditions. The growth rate will also depend on factors such as the amount of light, nutrients, and water provided.
It's important to note that while cannabis plants may experience the most growth during the vegetative stage, the flowering stage is when the plant will produce buds that contain the desired compounds, such as THC and CBD. The timing of the flowering stage will depend on the strain and growing conditions, and it can range from around 6-12 weeks.