How Many Cannabis Plants Can You Grow in Maryland?

In Maryland, adults 21 and older can grow up to two cannabis plants at home for personal use, and registered medical cannabis patients 21 and older can grow up to four. The cap is per residence, not per person, so roommates and partners share the same allowance rather than stacking it.¹ Growing outside those limits, or without the required security, is a misdemeanor.

The Adult-Use Limit: Two Plants Per Household

Maryland Criminal Law § 5-601.2 lets any adult at least 21 years old cultivate cannabis at home, but no more than two plants total may be grown at a single residence, no matter how many adults live there.¹ Two adults sharing a house share those two plants. There is no version of the rule that allows one per adult.

Anyone under 21 is prohibited from cultivating cannabis at all. The statute makes no exception for younger adults, including those who might otherwise qualify for medical cannabis.

The Medical Patient Limit: Four Plants Per Household

Registered medical cannabis patients aged 21 or older can grow up to four plants per residence.² The household cap works the same way: two qualifying patients living together still share four plants between them, not eight.

To qualify, you have to register with the Maryland Cannabis Administration and hold a written certification from an MCA-registered provider treating you for a qualifying condition.³ One point worth flagging: a designated caregiver cannot grow plants on a patient’s behalf. Cultivation rights belong to the qualifying patient personally.

Security and Where Plants Can Be Grown

Whatever your limit, plants have to be secured. The law requires “reasonable precautions” to keep cannabis away from anyone under 21 and from unauthorized access, and it points to an enclosed, locked space that no one under 21 has a key to as the example of what qualifies.¹ A locked closet, spare room, or lockable greenhouse fits. Specific hardware is not required, but the precautions have to actually work.

Plants also have to be out of public view. The statute says they cannot be visible from any vantage point, including neighboring private property, without binoculars or other optical aids.¹ A plant on your back porch that a neighbor can see from their yard runs afoul of this rule, even on your own property.

Cultivation is only permitted on property you lawfully possess, or where the owner has given you permission.

Renting or Living Under an HOA

Because cultivation requires the consent of whoever lawfully possesses the property, a landlord can prohibit it outright, and your lease controls.¹ Growing against the terms of your lease is grounds for eviction. Read your lease for any cannabis or controlled-substance clauses before setting anything up. Condo and townhome owners should check their HOA covenants as well.

Seedlings and Clones Count

Maryland’s definition of cannabis includes seeds, seedlings, immature plants, and clones. Your two- or four-plant limit counts every living plant at every stage, not just the mature ones. If you sprout four seedlings planning to keep the best two, you already have four plants in the eyes of the law the moment they are viable. Start only as many as your household cap allows.

What Happens If You Go Over

Any violation of the home cultivation rules is a misdemeanor, whether you grow too many plants, fail to secure them, or cultivate while under 21. The maximum penalty is three years in prison, a $5,000 fine, or both.¹ The same exposure applies to a third plant as to ignoring the security rules entirely.

Penalties escalate if the operation looks like more than personal use. Possession with intent to distribute is a separate offense under § 5-602, and the protection for personal cultivation ends the moment cannabis is exchanged for money or anything else of value.⁴

Federal Law Still Applies

Maryland allows home cultivation, but cannabis remains a Schedule I controlled substance federally. No federal rescheduling has been finalized as of early 2026, though a presidential executive order has directed the process. Two consequences reach ordinary home growers.

Firearms are one. Under 18 U.S.C. § 922(g)(3), an “unlawful user of” a controlled substance cannot possess firearms or ammunition, and state legalization does not remove you from that prohibition.⁵ If you use cannabis and own guns, you are in violation of federal law whatever Maryland permits.

Mortgages are the other. Federally backed loans through FHA, VA, and USDA programs follow federal law, and a property tied to cannabis cultivation can be treated as ineligible, even when the grow is legal under state law. Conventional lenders vary. Anyone with a federal mortgage should understand the risk before setting up a grow space.

Safety Hazards to Take Seriously

Indoor cultivation carries real hazards. High-wattage grow lights draw significant current, and improperly wired setups are a leading cause of residential fires in home grow operations. If you are adding circuits or running extension cords to power lights, fans, and pumps, have a licensed electrician evaluate the load. Maryland building codes and the National Fire Protection Association both set standards for indoor horticultural spaces, including requirements for noncombustible materials and clearances from ignition sources.

Making cannabis concentrates with butane or other volatile solvents at home is extremely dangerous and subject to fire code requirements that residential spaces almost never meet. Grow the plant; leave extraction to licensed processors.

1
Maryland General Assembly. Maryland Criminal Law Code 5-601.2 – Cultivation of Cannabis Plants
2
Maryland General Assembly. Maryland Code, Alcoholic Beverages and Cannabis Article 36-302
3
Maryland Cannabis Administration. Process to Legally Obtain Medical Cannabis
4
Maryland General Assembly. Maryland Criminal Law Code 5-602 – Distributing or Dispensing Controlled Dangerous Substance
5
Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts