The Danvers Rail Trail will be getting a little greener with the help of a recent donation from a local business. Cell Signaling Technology provided the trail committee with a $1,300 grant to support the group’s Greening up the Danvers Rail Trail program. Under the initiative, the committee plans to install 20 planters at key intersections along the trail, featuring an assortment of spring bulbs and seasonal flowers, according to Kate Day, the town’s senior planner. Boy Scout Troop 155 has agreed to manage an adopt-a-planter program beginning next spring for residents, businesses, and organizations for maintaining specific planters. To participate, e-mail firstname.lastname@example.org. Meanwhile, the committee is inviting the public to take part in a rail trail work party on Saturday. The work will involve installing the bases for four interpretive signs created for the trail through funding provided by the Essex National Heritage Commission. Volunteers are asked to meet at the Hobart Street parking lot at 8 a.m. The work is expected to take about four hours.