The Ecological Landscaping Association will present a program on Saturday, September 18, from 10 – noon, at the Perkins School, 175 North Beacon Street in Watertown. Join Eco-Tour guide, Sonia Baerhuk, for a tour and presentation of large-scale construction projects at the Perkins School. Sonia will discuss proven techniques for successfully navigating the challenges of large-scale construction while creating and preserving ecological landscapes. This tour will include procedures for protecting trees and shrubs during construction and will discuss transplanting using the air-spading method.Â $20 for ELA members, $25 for non-members. Walk-ins also welcome. For more information: email@example.com or (617) 436-5838.