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"Newly revised and expanded, this best-selling guide to perennials, ferns, and ornamental grasses remains an indispensable reference for new gardeners or garden professionals. At the heart of the book is a comprehensive directory of perennials available in Canada and the US. Reflecting the improved varieties of recent years, this directory includes many new plants, making it the most complete and up-to-date guide available. The fully illustrated directory is supplemented by information on soil and site requirements, garden design, caring for your garden throughout the year, and preventing pests and diseases. This book has everything you need to know about perennials, choosing plants, and caring for your garden."