Winter-weary New Englanders have watched more than eight feet of snow fall this season, so an event like the Boston Flower & Garden Show couldn’t arrive soon enough. An annual harbinger of spring, this dazzling spectacle featuring more than 20 flower- and greenery-filled displays following this year’s “Season of Enchantment” theme takes place at the Seaport World Trade Center from March 11–15. Visitors can enjoy lectures, demonstrations, a flower-arranging competition and garden marketplace showcasing the latest plants, garden tools and more throughout the five days of floral festivities. In addition, a preview party/charitable fund-raiser takes place March 10 from 6:30–9:30 p.m.