Many botanical gardens and even city parks show off plantings of mums in the fall, so be sure to check on locations close to home. Some places go above and beyond to create eye-popping displays, such as the chrysanthemum festivals at Longwood Gardens in Kennett Square, Pennsylvania (Nov 1-21), Bellingrath Gardens and Home in Theodore, Alabama (Nov 12-25), and the Portland Japanese Garden in Oregon (Oct 9-17). The National Chrysanthemum Society also hosts an annual show (this year at Sherman…