by Connie Oswald Stofko Plant exchanges can be a good way for beginners to get started in gardening. For experienced gardeners, plant exchanges provide a way to find good homes for their excess plants, and perhaps even find something new and unusual for their own gardens. “You tend to see a lot of the same plants, such as daylillies and black-eyed Susans,” said Peter Arnold, branch manager at the Eggertsville-Snyder Branch Library, who has organized the spring and fall plant…