It has been my good fortune to have seen amateur and commercial gardening in all parts of the United States, and I have tried to express something of this generality in the book; yet my experience, as well as that of my original collaborators, is of the northeastern states, and the book is therefore necessarily written from this region as a base. One gardening book cannot be made to apply in its practice in all parts of the United States and Canada unless its instructions are so general as to be practically useless; but the principles and points of view may have wider application.