The book "The Effects of Cytokinin on Ornamental Crops" offers a comprehensive analysis of the role of cytokinins as plant growth regulators in ornamental plant production. It begins with a historical overview of the use of plant growth regulators in the United States and then delves into the properties and effects of cytokinins in detail. Various application methods and the potential benefits for ornamental plant cultivation are also discussed. A notable feature of the book is the extensive reference tables that summarize research on cytokinins in horticultural practice since 1955. These tables are organized by different plant types, including herbaceous ornamentals, cut flowers, woody ornamentals, and non-ornamental horticultural crops. This specialized book is aimed at professionals and students seeking a deeper understanding of the application of cytokinins in ornamental plant production.