The Countess of Arran resides at Castle Hill, her ancestral home in Devon, England. The 18-century estate house is situated in a noted landscape park and woodland garden. Magnificent statues and rare trees in the arcadian landscape are complemented by woodland plantings of magnolias, rhododendrons, and camellias, as well as carpets of spring-blooming bulbs. Lady Arran, an accomplished gardener and garden enthusiast, commissioned Chelsea Gold Medal-winning designer Xa Tollemache to create a Millennium Garden for Castle Hill. The result is a richly planted garden of herbacious borders featuring lavender and boxwood.

Tony Avent is the peripatetic President of Plant Delights Nursery Inc., searching out and offering “the best and coolest plants” as part of his mission to turn all of North America into official “green states.” A contributing editor to Horticulture, he’s also the author of So You Want to Start a Nursery.

Page Dickey is a gardener, garden writer, teacher and lecturer who lives in rural New York State where she tends a country garden. She is the author of Dogs in Their Gardens, Cats in Their Gardens, Inside Out: Relating Garden to House and the award-winning Breaking Ground. She contributes to many magazines, including Horticulture.

Dan Hinkley is one of the premier plant explorers of the modern era, and his name has become a byword for unusual plants. Born in Michigan, he now makes his own garden in the Northwest on the Kitsap Peninsula of Washington State when he's not traveling the world. "I'm committed to being a generalist," he says. "There are too many great plants out there."

Roy Klehm, a member of the great Klehm nursery dynasty, is best known for his peonies, daylilies and hostas. At his Song Sparrow nursery, Klehm offers an enviable array of perennials, vines, and woody plants that thrive in the continental climate of zones 4-8 as well as in milder situations.

Nan Sinton is director of programs for Horticulture, leading tours and symposia, as well as lecturing and teaching design seminars. She recently co-authored, with Dr. David C. Michener, Taylor's Guide to Ground Covers.

P. Allen Smith is an award-winning garden designer and host of the public television program P. Allen Smith's Garden Home and the syndicated 30-minute show P. Allen Smith Gardens. He has emerged as America's most recognized and respected garden design expert, providing ideas and inspiration through multiple media venues.

Chris Strand is the Director of the Garden and Estate at Winterthur. Discover the Winterthur Garden through his eyes and learn why many consider Winterthur to be one of America's greatest gardens. Explore how its design can be adapted for your own home landscape.