The 4th annual Earth Day Festival is happening at the Norwalk Green (8 Park Street) on Saturday, April 26 from 11 to 3. Organizers expect an even larger turnout than last year’s 1,500 attendees. Over 75 exhibitors and vendors promoting environmental awareness and action will be joined by live entertainment, activities, and more for a family fun experience.

Kathleen Connolly presents “Foundation Gardens and Native Plants.” Kathy is a landscape designer, writer and speaker who emphasizes earth-friendly designs, native plants and low-impact land care techniques. She will discuss the design problems posed by the foundation area around homes and buildings and then explore the use of native plants that fit into that highly visible setting. Open to the public.

The Norwalk Garden Club visits Sleepy Cat Farm, located in Greenwich, during Garden Conservancy’s Open Garden Days. This extensive garden of 13 acres has been developed over the past 25 years to include a variety of landscape experiences from pathways to garden rooms, boxwood topiary, garden sculpture, fountains, reflecting pool, koi pond, meadow, and much more.

The two-hour, self-guided tours are offered to the public by reservation only. Price for Garden Conservancy members, $5 and non-members, $10.