 Point of Rock's about 650. For the MTA Transit team, I'm Austin Todd on WSMD. Barrett Garden Center is Frederick County's largest garden center and landscape supply yard. Landscape supplies, flowers, plants, and more. Barrett Garden Center has chicken coops, sheds, and is a leading load trailer dealer. Barrett Garden Center on Daysville Road off 194 in Walkersville. Call 301-845-0444 today.