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

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

– with a named provider, up to 1 ounce of usable marijuana.

– if the cardholder has not named a provider, the cardholder may possess up to 4 mature plants, 4 seedlings and the amount of usable marijuana allowed by the department by rule (1 oz. usable cannabis).