Learn how to preserve your summer garden harvest through canning, freezing and dehydrating at the Dunwoody Community Garden & Orchard’s next Master Gardener seminar, Sat., July 8, 11a-12p at Brook Run Park, 4770 N. Peachtree Rd., 30338. Join Master Gardener Janis Sims and other gardening enthusiasts for this informative presentation at the DCGO greenhouse complex, opposite the skate park. Free! Refreshments served. www.dcgo.org.