you must buy from a licensed busineess. Unless you're a medical marijuana patient. If you're a patient you can grow but you have a limited number of plants you're allowed to have. The existing laws for patients are suppose to be unchanged except the fact that if you're a patient and you drive you could be charges with a DUI even if you're not impaired.
Much education today is monumentally ineffective. All too often we are giving young people cut flowers when we should be teaching them to grow their own plants. - John W. Gardner