Book excerpt: In my many years in the horticulture industry, especially in the teaching end, I've found that the vast majority of gardeners believe that the real challenge in gardening is to produce a beautiful garden with minimal care. However, the "true" gardener likes to push and is willing to make the needed adjustments, work, sacrifice, whatever, to grow some prized possession. And what on earth is wrong with that? If a gardener is so inclined, he or she is welcome to brag about having a perfect lawn, or growing the first Isoplexis canariensis in the neighborhood. Yet only a very tiny percentage of people want the challenge of growing really unsuitable plants, which involves not just extra time on the gardener's part, but also includes heavy resource use. Besides, some plants are too specialized for the average gardener. Everyone is welcome to dig, bag, chill, spit, and turn summersaults to get a temperamental posy to do just right. But telling others to do this is less than good advice. There is plenty of "fun" in gardening to keep everyone busy; we don't need "work" to make gardening fun. In this book, Felder presents us with the "what-does-best" plants--the plants that fill our gardens with the least care needed, and that, in turn, allow us more quality time in our garden oases. For those who want a landscape of entirely low-maintenance, this is certainly the listing of the lowest. "Tough," as in the title of this book, is Felder's word for "hardy." "Tough" is also the word for Felder's no-nonsense style that cuts through the--let us say--manure of the plant selection process.--Adapted from introduction.