Medical marijuana growers know the importance of getting fresh air to their plants. Without it, plants quickly become sickly, stop growing and get taken by disease. Savvy indoor growers looking to push their girls to the limit use supplemental CO2. CO2 is a gas used by plants during photosynthesis. Photosynthesis, in turn, produces all the energy plants need to function. So it makes sense that increasing the concentration of CO2 around the plant should increase its rate of growth. Sure enough, studies and first-hand experience confirm adding CO2 can significantly boost growth.
