My goal in producing this book is basically what I have been doing all my professional life - sharing science based information to anyone who wants to learn. There are many gardening books and websites. Many are based on opinion and experience. These two characteristics are good, but even better when backed by scientific research. In this book, I share information that has been substantiated by scientific research. If it is my opinion, I will simply say so, but you won't find much of that. The information I convey is either based on research I have conducted or am familiar with or information which I have gathered from various university websites. This material is mostly applicable to the tropical and subtropical world.