Can You Grow Weed in Massachusetts? Plants, Storage, and Limits

Yes, you can grow weed at home in Massachusetts if you are 21 or older. Each adult may cultivate up to six plants for personal use, with a hard ceiling of 12 plants per household no matter how many adults live there. The plants have to be locked up, hidden from public view, and grown somewhere the property owner allows it.¹

How Many Plants You Can Grow

One adult, six plants. Two or more adults sharing a home, 12 plants total. That household cap does not scale up with the number of qualifying residents, so three roommates who each want a full six-plant setup are out of luck.¹

The statute does not spell out a residency requirement, and the state’s official guidance lists only the age threshold for who can grow.² No one under 21 can possess, cultivate, or receive marijuana in any form, and no parent or guardian can authorize it.³

Going over the limits carries civil penalties, not criminal charges, at least for smaller overages. Cultivating more than six but no more than 12 plants as a single grower brings a fine of up to $100 and forfeiture of the excess. Growing more than 12 plants pushes into unlicensed manufacturing territory, which is treated more seriously.⁴

Where and How You Have to Keep the Plants

Two rules govern the physical setup. Plants must be kept in an area equipped with a lock or other security device, and they cannot be visible from any public place without binoculars, aircraft, or other optical aids.²

“Locked” means an actual locking mechanism: a deadbolted room, a locked closet, a padlocked grow tent. A closed door or an unlocked shed does not satisfy the rule. The point is to keep minors and other unauthorized people out.

The visibility rule is the one outdoor growers underestimate. A front yard, an unfenced patio, or an open porch will not do. If a neighbor can see the plants from the sidewalk, you have a problem. Most Massachusetts home growers stay indoors for that reason, since a locked grow room or tent handles both requirements at once.

What You Can Do With the Harvest

Growing is legal, but the finished product comes with its own limits. Inside your home, you can keep up to 10 ounces plus whatever additional marijuana your plants produced on the premises. Anything over one ounce inside the house must be secured with a lock. Outside your home, you can carry up to one ounce on your person, with no more than five grams of that in concentrate form.¹

Carrying more than one ounce but not more than two outside the residence is a civil infraction with a fine of up to $100 and forfeiture. Failing to lock up more than one ounce at home carries the same $100 penalty.⁴

You can also give away up to one ounce to another adult 21 or older, with no more than five grams in concentrate form, so long as nothing of value changes hands and the transfer is not advertised or promoted to the public.¹ Posting on social media or setting up a “gifting” table at a market crosses the line into public promotion, which is not what the law protects.

Processing Restrictions

Simple processing at home is fine: heat, pressure, water, alcohol. What is off-limits is any volatile liquid or gas with a flashpoint below 100 degrees Fahrenheit, which rules out butane, propane, hexane, and similar solvents.³ The restriction applies to medical patients too. Only licensed manufacturers can use volatile extraction. Rosin presses, bubble bags, and ethanol washes stay legal for home processors.

If You Rent

State legalization does not override your lease. Property owners can prohibit the production, processing, and display of marijuana on property they own, occupy, or manage.³ A no-growing clause is enforceable, and violating it can be grounds for eviction. Read the lease before you set anything up.

Consumption is treated differently. A lease cannot prohibit non-smoking consumption (edibles, tinctures, topicals) inside your unit unless allowing it would put the landlord in violation of federal law or regulation. Landlords can still ban smoking marijuana the way they ban smoking tobacco.³

Federally Subsidized Housing Is a Separate Problem

Marijuana is still a Schedule I controlled substance federally, and growing it counts as “manufacture” under federal law. For most homeowners, that conflict stays theoretical. If you live in public housing or use a Section 8 voucher, it is not.

HUD requires owners of federally assisted housing to have policies allowing termination of tenancy for any household where a member uses or manufactures marijuana, regardless of state law. Property owners receiving federal housing subsidies cannot affirmatively permit marijuana use or cultivation. Growing at home in federally subsidized housing can lead to eviction, loss of future assistance, or both. A Massachusetts medical card does not change that. If you live in any form of federally assisted housing, home cultivation is effectively off the table.⁵

Higher Limits for Medical Patients

Registered medical marijuana patients get more room. A qualifying patient can cultivate up to 12 flowering plants and 12 vegetative plants (excluding clones) without a special permit. Patients who need more can apply for a Hardship Cultivation Registration, which allows enough plants to maintain a 60-day supply, and the Cannabis Control Commission reviews those applications within 30 calendar days.⁶

If you hold a medical card and also grow recreationally, the medical limits govern the medical portion, but the plants share the same household and physical space, so clear records matter.

1
General Court of Massachusetts. Massachusetts Code Chapter 94G Section 7 – Personal Use of Marijuana
2
Mass.gov. Massachusetts Law About Recreational Marijuana
3
General Court of Massachusetts. Massachusetts Code Chapter 94G Section 2 – Limitations
4
General Court of Massachusetts. Massachusetts Code Chapter 94G Section 13 – Penalties
5
U.S. Department of Housing and Urban Development. Use of Marijuana in Multifamily Assisted Properties
6
Cornell Law School. 935 CMR 501.027 – Hardship Cultivation Registration