The twice-yearly plant sale at the Huntington Library, Art Collections and Botanical Gardens gives you the chance to own a little piece of California's growing history. In addition to the usual plant-sale finds, the Huntington offers cuttings from its own rare plants — everything from roses to strawberries to cacti — in a huge range of sizes. Some of these cultivars are not available commercially anywhere. People line up hours in advance, bringing wagons and carts to carry home their purchases. And it's open to all, not just members (although they get first crack at it). Many of the Huntington's knowledgeable volunteers are on hand to answer questions, whether about a specific purchase or more general topics such as dividing irises or pruning roses. —Lisa Horowitz
1151 Oxford Road, San Marino, 91108. (626) 405-2100, huntington.org.