Missouri Constitution article XIV, section 2, is the adult-use section for a person who is at least 21.
This is a plain-language summary, not legal advice. Laws and local rules change. Read the official sources at the bottom of this page.
Cannabis-friendly lawyers in Missouri
Listed October 2026
These firms and attorneys are listed in the NORML lawyer directory for Missouri. Cities and phone numbers below are taken from those listings.
Criminal defense and individual help
Daniel Dodson NORML directory
Jefferson City
Listed in the NORML lawyer directory for Missouri as a criminal defense and marijuana lawyer in Jefferson City.
Source: NORML listing
deVries & Associates, PC NORML directory
F. Coulter DeVries · Kansas City
Listed in the NORML lawyer directory for Missouri as a criminal defense and marijuana lawyer in Kansas City.
Source: NORML listing
Groce & DeArmon, P.C. NORML directory
Steven F Groce · Springfield
Listed in the NORML lawyer directory for Missouri as a criminal defense and marijuana lawyer in Springfield.
Source: NORML listing
Criminal defense
These lawyers defend cannabis and marijuana charges in Missouri.
The Harshman Law Firm
Kansas City
The Harshman Law Firm specializes in protecting medical cannabis patients from criminal prosecution.
Combs Waterkotte
St. Louis
Combs Waterkotte is a leading Missouri criminal defense firm that has helped many people across the St. Louis area who have been charged with crimes related to marijuana.
Starting a cannabis business
These lawyers help with licensing, forming a company, and compliance for a cannabis business in Missouri.
The Harshman Law Firm
Kansas City
We assisted multiple clients with the facility license applications for cultivation, manufacturing and dispensary.
D.B. McCracken Law
St. Louis
Prepare license applications for medical and adult use facilities.
Not a referral. This list is not an endorsement, and there is no paid placement. We have not verified bar standing or discipline history. Before you hire anyone, confirm them through the Missouri Bar.
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Possession, plants, and penalties in the constitution
- A person at least 21 may purchase, possess, consume, use, or transport three ounces or less of dried, unprocessed marijuana, or its equivalent, and may deliver or distribute that amount without consideration.
- Cultivation of up to six flowering plants, six nonflowering plants more than 14 inches tall, and six clones under 14 inches is allowed if the grower is registered with the department.
- Plants, and any marijuana produced in excess of three ounces, must be kept at one private residence, in a locked space, and not visible by normal unaided vision from a public place.
- Smoking marijuana in a public place other than an area licensed for that activity is a civil penalty not exceeding $100.
- Plants visible from a public place can bring a civil penalty not exceeding $250 and forfeiture of the plants.
- A person under 21 who possesses, uses, transports, or delivers three ounces or less is subject to a civil penalty not to exceed $100 and forfeiture, with an option of up to four hours of drug education.
- A licensed facility may not let cultivation, manufacturing, sale, or display be visible from a public place outside the facility without the use of optical aids.