Photo credit: Baltimore Sun/Susan Reimer

Saturday, Annmarie Garden, Solomons: Are you a bay-wise gardener? 10 a.m. Learn how you can mitigate your impact on the Chesapeake Bay by using native plants, reducing lawn area and changing other gardening habits. While you are there, visit the new butterfly garden and the new art exhibits in the gallery: Green and Green, Too. Admission is Annmarie Garden is $3 for adults, $2 for seniors and $2 for children.

Sunday, Cylburn Arboretum, Baltimore: Cylburn Highlights Tour, noon and 2 p.m. Walk the grounds with a docent to discover the natural beauty and history of the arboretum.

Daily, U.S. National Arboretum, Power Plants; 8:00 am – 5:00 pm. (Adjacent to the National Herb Garden.) Walk through Power Plants to discover the wide variety of plants that offer alternative energy possibilities. This garden exhibit showcases living plants and provides educational signage about how they can serve as sustainable agriculture-based energy sources (note that during the winter, most of the crops are dormant or, if annuals, gone for the season). A scavenger hunt activity available at the information desk in the administration building will help school-aged children explore the exhibit. Free. No registration required.