The Ecological Landscaping Association and the Newton Parks and Recreation Department are sponsoring a free program on Wednesday, April 25, from 6 – 8, on Invasive Plants: Understanding the Threat to Our Parks and Backyards, at Cold Spring Park, 1200 Beacon Street in Newton.  Invasive plant species damage the lands and waters that native plants and animals need to survive.  What are invasive plant species and what harm to they to to an ecosystem?  Newton native and ELA Board Member Bruce Wenning is an invasive plant specialist.  During visits to Cold Spring Park, Bruce discovered that several types of invasive plants are present and spreading along the trails.  Join Bruce for a walking tour at Cold Spring Park to learn how to identify several types of invasive plants and learn what you can do in your own landscape to safely remove them.  Bruce will explain how different types of invasive plants spread and what removal methods are effective on each.  He will also discuss the important topic of how to safely dispose of the invasive plants once removed from the landscape.  Registrations are limited. Call 617-436-5838, or email ela.info@comcast.net.