Since its first publication in 1987, the AHS Encyclopedia of Plants & Flowers has sold nearly three million copies worldwide.Packed with 8,000 plants for every climate — inside and out — from trees, shrubs, perennials, annuals, biennials, bulbs, water plants, and cacti, the AHS Encyclopedia of Plants & Flowers is a must-have reference for all gardeners! This fully revised and updated edition features a brighter, clearer design and improved navigation — cataloging plants by color, season, and size — that makes the book more intuitive for the reader. The American Horticultural Society (AHS) is one of the oldest national gardening organizations in the country. Since 1922, they have provided America's gardeners with the highest quality gardening and horticultural education possible.