Low growing plants that cover the ground without resorting to continued weeding and mowing are important to Mount Auburn’s ecologically sustainable horticultural practices. Join Frances Doyle and Jim Gorman for a walk on Monday, July 18, beginning at 5:30 pm, featuring this sometimes overlooked group of plants. Fee: $5 members; $10 non-members. To register, or for more information, call 617-607-1952, or log on to www.mountauburn.org.