Here is the issue with a collective garden.
SB 420 encourages access to medical marijuana through "collective, cooperative cultivation projects. " Unfortunately, it* provides no guidelines or explanation as to how these should operate.*** Presumably, the basic model is a group of patients and caregivers who plant a garden together and share the crop among themselves.** The cultivation cooperative model does not*necessarily envision walk-in clients, nor retail sales of medicine to members.* Co-ops may be supported by participation in work, donations or* membership fees.* Under one model, co-op patients pay a set gardening fee for a certain part of the crop, and receive the harvest at no further charge. Unlike caregivers, collective gardens aren't limited to patients from the same "city or county."
So either consult a lawyer or do a collective grow as legal as possible and don't tell anyone. If nobody knows the barring really bad luck there will be nobody to rat you out