Enjoy Historic New England’s selection of hundreds of orchid plants, including cattleyas, laelias, paphiopedilums, and phalaenopsis, at the Spring Orchid Sale at the Lyman Estate Greenhouses, 185 Lyman Street, Waltham, on Friday through Sunday, April 4 – 6, from 9:30 am – 4 pm. Species and hybrid plants that are budded and blooming are available. Let their gardening experts help you choose the right plants for your home. Free admission. Image from www.orchidboard.com. For more information visit www.historicnewengland.org.