The Master Gardeners of Mercer County will host "Color, Shape and Texture in the Garden," by Kathy Enquist, 7:30 to 8:30 p.m. Monday at Rutgers Cooperative Extension of Mercer County, 930 Spruce St., adjacent to the Trenton Farmers Market. She will show how to use design elements of color, shape and texture to create more interesting and successful flower gardens. A donation of $3 is suggested. To pre-register, call (609) 989-6830.