The third edition of the comprehensive—and entertaining—gardening reference by the master horticulturalist. This is the long-awaited third edition of Allan

A reference guide to the identification and culture of over 3500 herbaceous perennial plant species, varieties and cultuvars. Includes bibliography, common name

"When the first volume of HPP was released thiry-one years ago, it quickly became a leading resource in the field of horticulture. It was recognized as one of t

Resource added for the Landscape Horticulture Technician program 100014.

“A veritable goldmine for gardeners.” —Plant Talk We’ve all seen gorgeous perennial gardens packed with color, texture, and multi-season interest. Desig