While many other books of this kind give only basic information such as sun/shade, height/width, there are so many as 30 specific categories for each plant group. The categories cover such important criteria as light and soil requirements, zone hardiness, height and width, pest and disease susceptibility, urban tolerance, and tolerance to salt and drought. The lists also include many criteria often overlooked such as growth rates, overall messiness, root systems, minimal fall clean up, maintenance levels, soil PH and landscape value/use, and many visual characteristics such as texture, foliage color and fall colors, bloom colors and seasons, shapes and forms, attractive bark and foliage and more. There is also a candid Pros & Cons section covering some realistic considerations for each of the plant species groups.