Each year, gardeners with a green thumb can add unusual or hard-to-find plants to their yards, window boxes, and flower beds at the Morris Arboretum’s annual plant sale. The sale runs on Friday, May 10, from 10 a.m. to 8 p.m., and Saturday, May 11, from 10 a.m. to 4 p.m. at the Horticulture Center at Bloomfield Farm, across the street from the Arboretum’s public garden.

Friday is for members only; all members will receive a 10 percent discount on their entire purchase, and receive a free dividend plant (which could include a Japanese Tassel Fern, Columnar Basil, Cheyenne early lilac, or a Tea of Commerce). Saturday is open to the public; Morris Arboretum members receive a 10 percent discount on purchases.

Plants for sale are grown by local nurseries familiar with the regional climate and soils. Items include a varied selection of annuals and perennials—from the eye-catching “Bonfire Scarlet” begonia and the heat-tolerant “Phenomenal” Lavender to Kleim’s Hardy Gardenia and a selection of roses that date back as early as 1513. The Greater Philadelphia Chapter of the American Rhododendron Society will also be on hand with a large selection of rhododendrons, many of which are not available elsewhere. For more information, go to www.morrisarboretum.org.