District of Columbia
Medical Marijuana
D.C. Code §§ 7-1671.01 to 7-1671.13 (2017)
1981 Act No. 18-429 
Legalization of Marijuana for Medical Treatment
EFFECTIVE DATE: July 27, 2010
D.C. Municipal Regulations, Title: 22-C Medical Marijuana
D.C. Code § 7-1671.06(e)(2) (2017)
A cultivation center shall not possess more than 500 living marijuana plants at any time.
Just for reference, here is the federal penalty for 500 marijuana plants:
$5/$25 million — 5 to 40 years in prison — 21 U.S.C. § 841(b)(1)(B)(vii) (2016)
Legalization
2014 Initiative 71
Legalization of Possession of Minimal Amounts of Marijuana for Personal Use
EFFECTIVE DATE: February 26, 2015
History
1981 Act No. 4-51
Uniform Controlled Substances Act
EFFECTIVE DATE: August 5, 1981
Page last updated on January 1, 2018