Dr. Armitage is well known as a writer, speaker and researcher throughout the world. He has written over 250 articles and papers in journals such as Fine Gardening, Horticulture Magazine, American Nurseryman, Greenhouse Grower, Grower Talks, Plant Physiology and the journals of the American Society of Horticultural Science. He writes a monthly column for Greenhouse Grower Magazine, a national trade journal. He is the author of 8 books. He is best known for his classroom and reference text, Herbaceous Garden Perennials, a Treatise of Identification, Culture and Garden Attributes, a standard reference for gardeners, professionals and students. As a teacher and speaker, Dr. Armitage has lectured in Canada, United States, Colombia, New Zealand, Australia and Europe and is in constant demand. His long interest in New Crops for the garden, greenhouse, and field has taken him to gardens all over the world. Dr. Armitage has been the recipient of numerous awards for his achievement and for his excellence in education. The Allan Armitage Leadership Award, was established by the Association of Specialty Cut Flower Growers in his honor. He also served as an advisor for the Garden Book Club of America and has consulted for Scholastic Books, publisher of the Magic School Bus series of science books for children.