Yes, recreational marijuana can be grown by adults aged 21 or older, but cultivation is prohibited to six cannabis plants per an individual's primary residence and twelve plants at a residence where two or adults may be living. Cultivation must only take place in an enclosed area where the marijuana plants are not visible to the public.
Registered medical marijuana patients can cultivate even more marijuana, up to twelve cannabis plants at any given time, if their residence is located more than 25 miles from a state-licensed dispensary facility.