The Garden Conservancy’s Open Days program will visit Middlesex County on Saturday, May 10, with five gardens open to the public. Three gardens in Stow, one in Carlisle, and one in Concord will be in full spring display.

Clark Gardens has been in development for over 30 years. It started with a chance encounter at a parent teacher school event, held during the owners’ first winter in Stow, with a local landscape architect, Yurich Fenigsen-Zieba. When he stated he was a landscape architect, they explained to him their wish to have a waterfall built and the following summer he built a beautiful waterfall with large boulders previously removed from the foundation of our house. And thus began a collaboration which continues to this day. Over the 30 years, many garden “rooms” have been created culminating with the “woodland garden” which has been developing over the last three years and occupies the last section of the two acres of gardens and lawn available. There has never been a formal “plan” to the gardens. Identifying an area and then adding desirable shrubs and plants, has been the only “plan”.

The Gardens at Clark Barn has been on the Open Days program before. The Ruettgers have been gardening here 45 years, although the house and drying barn date to 1790. Entering the gardens from an arched gate, explore the old barn with trays of dried flowers and herbs harvested from the adjacent gardens. During 1939, these trays were drying digitalis leaves for a WPA project for the war effort while cut off from Europe. The digitalis was used medicinally for the heart. As you exit the first garden, you enter by a Belgian espalier fence of pears which encloses this room with borders of tulip mixture of ‘Lemon Chiffon,’ ‘Explorer,’ and ‘Avant Garde.’ Later, the bed changes to dahlias potted in the greenhouse, as well as seed trays of zinnias and salvias. A grape arbor leads you into a walled garden in four quadrants. In the early season, it is just awakening with antique roses, beds of thyme and lavender, purple fennel, angelica, and lovage. The greenhouses are filled with tender perennials, annuals, and a collection of scented geraniums, over 25 varieties of dahlias, and Abyssinian bananas, all waiting to be planted. The outside cold frames are filled with a mix of soft pink petals of Tulip ‘China Town’ and Tulip ‘Esperanto.’ Looking to the East, you see an orchard of apples and peaches. West of the greenhouse is a tall stand of oaks showing you the way past the children’s tree fort to the woodland garden and pond. This is the garden that appears in April and May. The woodland ephemerals put out a show each day with bloodroot, Erythroniums both white and yellow, trillium, Dutchman’s breeches, Podophyllums, squill mix, anemones and Leucojum. Later in May, alliums pop up between the hosta collection and Japanese Peonies japonica and obovata. Pass through a hornbeam hedge to the Clock Barn. In this barn, don’t miss several spring floral displays in the downstairs space. As you exit the barn, the house is on the left. Step up onto the patio to view the Italian pots and trough filled with bulbs and a collection of dwarf conifers. As you descend the end stairs, you see a border of tulip mixture leading to the secret garden with Japanese fencing on one side.

Also in Stow is Glenluce Garden, a small, personal, and romantic garden. Entering by the western gate, you will fnd 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.

Rock Bottom Garden is a one acre garden 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 we first started gardening here, the property was a jungle of invasive trees, dying white ash, and multiflora rose. All were cut down, leaving us with a garden as sunny and windswept as the plains of Kansas for some years. We 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.

Finally, visit a Wildflower Woodland Garden (pictured below) in Concord. Nearly ten years ago, an uninhabited 1962 modern home and its abandoned garden were revived and reimagined. An indigenous woodland wildflower plant palette is arranged using concepts of midcentury modern garden design. The garden is organized as a stroll garden, with a main path giving access to a variety of experiences and some surprises.

Admission to each garden is $10 for nonmembers, $5 for members, and pre-registration is now open at www.gardenconservancy.org.