Imagine being a guest at an afternoon tea in the Hamptons, where your hosts happen to be a friendly, knowledgeable and accessible group of gardening professionals who are eager to share their love of flora. That's what a stroll through Berridge is like. It has all the traditional aspects of a well-stocked nursery: long flats bursting with annuals, herbs and vegetables, bare-root roses in season, native landscaping plants, succulents and indoor tropicals. But this carefully tended nursery at the base of Camelback Mountain also offers an unparalleled combination of charm and expertise. You'll find rare plants here, but no sniffy attitude: If you don't know a begonia from a bougainvillea, an affable staffer might point you to the miniature amphitheater, where a variety of demonstrations and lectures are hosted for both the novice and seasoned enthusiast. Berridge, established in 1938, gets a two green thumbs-up rating.