The biggest mistake gardeners make each season is starting out too big and then quickly realizing their large plot requires too much weeding, watering, and backbreaking labor. Vertical gardening guarantees a better outcome from the day the trowel hits the soil-by shrinking the amount of "floor" space needed and focusing on climbing plants that are less prone to insects, diseases, and animal pests. Notable author and gardener Breth Markham has tried and tested thousands of varieties of vegetables, flowers, and fruits and recommends the best plants for space-saving vertical gardening. His...