Join Historic New England at the Lyman Estate in Waltham on Saturday, April 28 from 9 – 1 for a morning of removing invasive species – garlic mustard, celandine, dame’s rocket, and bishop’s gout weed – that are crowding out the native plants and are not supportive of wildlife. Enjoy guided tours of the landscape and greenhouses in appreciation of your generous service. Obviously free (you can’t charge people to pull weeds, after all!) but registration is requested by calling 617-227-3956, or at www.historicnewengland.org.