I don't recall anything that forbids it, but not anything that allows it either. It's one of those gray areas I guess. May be considered a conflict of interest with the MMC as those patients could of just assigned caregivership to the MMC instead of the grower.

Would definitely do as recommended and keep separate grows. Everything grown for the MMC is supposed to be "tracked". If things come up short because you're providing for your patients, might lead to a sticky situation as the auditors might think stuff is going out the back door or something.