Did you know that almost all of the new plants in the Arboretum begin their lives in the Dana Greenhouses? Get a behind-the-scenes look of the greenhouse growing process, from seed to sprout to seedling to tree, on Tuesday, April 3, beginning at 1 pm. Meet at the Bonsai Collection. There is a 15-person maximum. There is no fee, but registration is required by emailing firstname.lastname@example.org, or by calling 617-384-5209. The address for the Dana Greenhouse is 1050 Centre Street, Boston.