Can you grow your own cannabis in Montana?
Yes. Montana medical patients can grow at home: 4 mature plants and 4 seedlings per cardholder (adults 21+ under adult-use: 2 mature and 2 seedlings); must own the property or have the owner's written permission.
Rules that usually apply
- Plants must be out of public view and secured from minors.
- Only registered patients (or their caregivers) may grow.
- Selling home-grown cannabis is illegal.
Sources
- Montana DOR - Cardholder Information
- Montana DOR - Physician Statement for a Debilitating Medical Condition
- MCA 16-12-102 - Definitions
- MCA 16-12-515 - Legal protections, allowable amounts
- MCA 16-12-509 - Written certification, accompanying statements
- MCA 16-12-502 - Definitions (standard of care)
This guide is general information, not medical or legal advice. Laws change — confirm details with your state agency. State facts last checked October 7, 2026.