The fifth edition of this long-standing favorite includes 100 additional species, hundreds of new cultivars, and the invaluable benefit of nine more years of experience since the last edition. Professor Dirr covers hardiness, growth rate, habit, foliage, fruit, flowers, size, propagation and much more. Plants are listed by scientific, common and family name. Commonly referred to as the "bible of the industry," every professional should have this book on hand.