I'm not an attorney, so please do not understand my answer as legal advice. My understanding of current medical marijuana is that that should OK, but the law is just vague enough to where I have questions myself.
What I can tell you is that our state's medical marijuana law is one of the weakest in the US and is only an affirmative defense. That means that even if you are within regulatory guidelines and have appropriate authorizations from a physician, law enforcement can still search your premises, seize pretty much whatever they want and so on and a local prosecutor can choose to prosecute you, leaving you to go through years of hassle and expense to then offer the affirmative defense of being covered by the state's medical marijuana...all of which a jury of 12 may or may not accept.
I-1068 would fix our state's medical marijuana law by making marijuana legal once and for all (for adults) and that would remove all the affirmative defense nonsense that's caused problems for so many patients in this state. It would then be up to the State Legislature to enact various regulations for both the adult use, possession and cultivation of marijuana in recreational, medical and industrial farming (ie, growing hemp) contexts.