Four ounces of usable marijuana at any given time, jointly possessed between the qualifying patient and the primary caregiver. "Usable marijuana" does not include the seeds, stalks, and roots of the plant.
Yes, no more than seven marijuana plants, whether immature or mature
Yes, primary caregiver is a person who has the responsibility for managing the well-being of the qualifying patient with respect to the medical use of marijuana. Primary caregiver is a person other than the qualifying patient, or the patient's physician. The caregiver must be 18 years of age or older. Qualifying patients shall have only one primary caregiver an any given time. Primary caregiver shall be responsible for the care of only one qualifying patient at any given time.
State of Hawaii, Department of Public Safety:
Hawaii Medical Use of Marijuana (Physician and Patient Information)