by Jorge Cervantes
Carbon Dioxide (CO2) Enrichment
Cannabis can use more CO2 than the 0.04 percent (400 ppm) that naturally occurs in the air. By enriching the amount of CO2 to 0.12-0.15 percent (1200-1500 ppm), plants can grow up to 30 percent faster, providing the genetics, light, water, and nutrients are not limiting. CO2 levels above 5000 ppm are not advised for people.
With CO2, plants use nutrients, water, and space at a faster rate. A higher temperature, from 75-80F will help stimulate more rapid metabolism.