Kerry Ann Mendez is an expert gardener and the author of “The Right-Size Garden: Simplify Your Outdoor Space with Smart Design Solutions and Plant Choices.” She’s also the owner of Perennially Yours, a landscaping company that focuses on the art of low-maintenence perennial gardening. Mendez is the author of “The Ultimate Flower Gardener’s Top Ten Lists: 70 garden-transforming theme lists and strategies for growing gorgeous, low-maintenance gardens in zones 3 through 7” and “Top Ten Lists for Beautiful Shade Gardens.”