Leave behind the gray days of winter and rejoice in the 2011 show, entitled A Burst of Color: Celebrating the Container Garden. Boston’s biggest horticultural happening provides the tools and inspiration to kick off the season in style.  Hours are 9 am – 8 pm Wednesday, March 16 through Saturday, March 19 and 9 am – 6 pm on Sunday, March 20.   A complete schedule of lectures and demonstrations will be posted at www.thebostonflowershow.com, but some highlights include a talk by Tovah Martin on The New Terrarium, a lecture by Ellen Ecker Ogden  on The Complete Kitchen Garden, and a charmingly entitled “Growing Your Groceries in Containers” by Teresa O’Connor and Jayme Jenkins.   The show plays host to amateur competitions as well, coordinated by The Massachusetts Horticultural Society along with The Garden Club Federation of Massachusetts.