Zandor, In a normal indoor environment is there CO2 around though or is it something that you probably would require to supply to the plants? I know more is better but for instance: If I were to grow them in a room and occasionaly open the door for ventilation or have a system to circulate the air out of the room would they have enough Co2 to survive? Or would I have to be in the room a lot to provide CO2?