“What’s Wrong with My Plant? (And How Do I Fix it?),” by David Deardorff and Kathryn Wadsworth (Timber Press, $24.95), came out in late 2009, when the only thing wrong with many plants is that they were still burrowed underground. This book bases its tutelage on progressive drawings that will help puzzled gardeners diagnose the troubles. And, another plus: The suggested remedies are organic.