From the Columbia Heights listserv:
The Bruce Monroe Community Garden (Georgia Ave & Columbia Rd NW) has open garden plots for the 2013 season (March – November). Single plots rent for $30/year and each person/family unit can reserve up to two plots for $60/year. There are also shared garden plots which are free; they are planted in community with other gardeners and each can share in the harvest.
Email brucemonroegarden(at)gmail.com for more information or to reserve a plot.