Garden District Inside Shop:  1520 14th Street, NW;  (202) 797-0657 Outside Shop:  1801 14th Street, NW;  (202) 797-9005 Johnson's Garden Centers Johnson's Washington 4200 Wisconsin Ave. NW, Washington D.C., 20016 Phone: 202-244-6100 Johnson's Olney 5011 Olney-Laytonsville Rd., Olney, MD 20832 Phone: 301-987-1940 Johnson's Kensington 10313 Kensington Parkway, Kensington, MD 20895 Phone: 301-946-6700