The Garden Conservancy hosts the Middlesex County Open Day on May 20 with three gardens, one in Weston, two in Stow.

The Spencer-Scott Garden in Weston is a sun-drenched site with deep loam. The owners set out to create a garden to satisfy their varied interests in flowering trees, shrubs, vines, ground covers, perennials, and bulbs. They designed, created, and maintain the garden. Included are rock gardens, partial shade gardens, dwarf evergreens, and perennial beds with walking paths, all set against an open meadow. Of special interest are many varieties of peonies, species of old roses, iris, hardy geraniums, alliums, lilies, wildflowers, clematis, daylilies, azaleas, and rhododendrons. They have collected more than 1,500 varieties over the years.

The Rock Bottom Garden in Stow is a one-acre garden has been shaped by three decades of collaboration between a woody plant zealot and a perennial gardener. From the 1855 house situated on top of a dry knoll, one enjoys sweeping vistas of the gardens below. When they first started gardening here, the property was a jungle of invasive trees, dying white ash, and multiflora rose. All were cut down, leaving them with a garden as sunny and windswept as the plains of Kansas for some years. They remedied this by planting trees, some of which are now nearly 60 feet tall. At present the garden is shaded in large part, and the perennial plantings are transitioning to reflect that. The garden features many unusual trees and shrubs, including rare magnolias and maples (some grown from seed), an herb garden, gravel garden, and a small vegetable garden. The striking topography makes the garden seem much larger than its actual size, and the trees include beautiful specimens you probably won’t see anywhere else in New England.

Also in Stow is Glenluce Garden, a small, personal, and romantic garden. Entering by the western gate, you will find yourself on a mound with green paths beckoning in seven directions. Explore these paths to discover a grove of paperbark maples, an island of tree peonies, or a border of fragrant native azaleas. A pergola covered by climbing roses leads to a frog pond shaded by heptacodium and a courtyard with raised vegetable beds. Magnolias, rhododendrons, peonies, and roses abound in Glenluce Garden.

Access to each garden is $5 for Garden Conservancy members, $10 for nonmembers. Tickets must be purchased in advance – no tickets will be sold on site. https://www.gardenconservancy.org/open-days/open-days-schedule/middlesex-county-ma-open-day-5