I’m not exactly sure, but I read somewhere you can grow your own in small quantities...just don’t take my word for it, I read it on blog.
http://en.wikipedia.org/wiki/Drug_policy_of_Colorado
Since the enactment of Colorado Amendment 64, adults aged 21 or older can grow up to six cannabis plants (with no more than half being mature flowering plants), privately in a locked space, legally possess all cannabis from the plants they grow (as long as it stays where it was grown),[1] legally possess up to one ounce of cannabis while traveling,[2] and give as a gift up to one ounce to other citizens 21 years of age or older.[3]