How much cannabis can I possess in Massachusetts with an MMJ Card?

In Massachusetts, you can possess the following amounts with a valid MMJ Card:

- Flower: Up to 60 days’ supply may be recommended, which is determined to be around 10 oz.
- Concentrates: 1 gram = 5.3 grams of raw flower.

This suggests that there is a maximum of approximately 50 g of concentrate for medical patients.