Growing cannabis from auto flowering seeds is a natural process. During the flowering stage, plants need 12 hours of light followed by 12 hours of darkness. CO2 can increase plant growth and yields by up to 20% when used indoors. Auto flowering plants can be grown indoors with less than 20 hours of daylight and are harvested around 75 days from seed. Cannabis removed from a cultivator's premises is presumed to be sold and subject to cultivation duties. Different light cycles can be used to produce more male or female cannabis crops from seeds. Autoflowering strains will flower irrespective of light cycles once a certain age and size is reached.