Just like spring itself, the Boston Flower & Garden Show is an annual harbinger of the fair weather to come. Taking place March 14–18 at the Seaport Hotel & World Trade Center, this colorful expo features beautiful garden displays created by local pros; amateur competitions in floral design, horticulture and photography fitting the show theme of “Savor Spring”; and dozens of vendors, lectures and demonstrations to help out seasoned home gardeners and the green thumb-challenged alike. Also check out the preview party on March 13 from 6–9 p.m., which boasts a sneak peak at the show, food, cocktails, raffles and live music, all to benefit The Genesis Foundation for Children.