This is the event of the year for green thumbs, master gardeners, and novices alike. Under one roof, you'll find six acres of gorgeous gardens and plant and flower exhibits created by the Pacific Northwest's top florists, horticulturalists, and landscape designers. More than 300 vendors sell all the latest garden gadgets, as well as the tried-and-true favorites, along with a huge variety of plants. Seminars (free with admission) cover virtually every gardening topic, from transplanting and organic gardening to xeriscaping and pruning; experts are on hand to answer questions about ikebana, bonsai, fruit and vegetable gardening, trees, and container gardening.