A leading figure in the New Perennial planting movement, garden designer Piet Oudolf emphasizes plant structure as the most important aspect of a successful garden. Form and texture are valued as much as color, and perennials--prized for their beauty throughout a natural life cycle--are used almost exclusively. Oudolf challenges conventional approaches to gardening that rely on short-lived bursts of color and constant maintenance and shows the delights of working with versatile, expressive perennials to create lasting, ecologically sound panoramas that relate to the greater landscape and the...