In Hawaii, you can possess the following amounts with a valid MMJ Card:
- 4 ounces of usable marijuana
- 3.5 grams of concentrated cannabis
This is the maximum amount in a fifteen (15) day period.
Qualified medical marijuana patients can grow their own cannabis in Hawaii - up to 10 plants at a single location owned by the patient and/or caregiver (total amount no more than 10 plants).