The homeowners of a two-story apartment in Brooklyn’s Prospect Heights neighborhood wanted a backyard retreat that was calm and inviting. But that was a tall order, considering the concrete jungle that existed behind the newly constructed dwelling.

The husband-and-wife landscaping firm Outside Space NYC was commissioned to turn the bunker-like space into a haven for entertaining and relaxing. Edward Jones oversaw the design of the hardscape, while Irene Kalina-Jones handled the planting.

Garden at a Glance
Location: Brooklyn, New York
Size: 930 square feet (86 square meters) Before Photo Outside Space NYC Landscape Design Initially the space was an unwelcoming pit — sited well below street level and surrounded by 22-foot-high concrete walls. “It was like a jail yard,” says Edward Jones. Before Photo Outside Space NYC Landscape Design A massive dry well to capture and disperse rainwater sat at the bottom, covered by thick concrete. Huge amounts of gravel needed to be removed, and the only way out was through the apartment. Outside Space NYC Landscape Design “After” photography by Irene Kalina-Jones

AFTER: The designers made the most of the existing structure, fabricating a showstopping waterfall and trellis to capitalize on the height of the concrete walls. Outside Space NYC Landscape Design The waterfall was constructed with cement board to cover the unattractive air conditioning pipe that runs the full height of the wall. “We covered everything in polished concrete,” says Jones. “It creates very interesting texture when water goes over it.” Outside Space NYC Landscape Design Fine-tuning the pressure and flow rate of the water was challenging. In the end, Jones succeeded in his goal of a gentle trickle that produces a pleasant sound. A switch lets the residents turn on the waterfall from inside the apartment. Outside Space NYC Landscape Design A pump at the base of the pool recirculates water. Pebbles of Mexican beach glass and mossy rocks add a naturalistic element.

To the right of the waterfall, Kalina-Jones planted both Chinese wisteria (Wisteria sinensis) and American wisteria (W. frutescens) to scale one of the metal trellises. The vines flower at different times, extending the bloom season. Outside Space NYC Landscape Design Raised planters were built from cinder blocks covered in polished concrete to echo the finish of the walls. Here a native Eastern redbud (Cercis canadensis) provides shade. Outside Space NYC Landscape Design The walkways are paved with 13-inch squares of local bluestone. Before Photo Outside Space NYC Landscape Design The landscapers carried out all debris and brought in all the soil and plant materials — even the trees — using the metal staircase leading to the second floor of the apartment. Outside Space NYC Landscape Design AFTER: Beneath the metal stairway, Jones built a storage area faced with ipe to match the upper-level deck. Outside some sliding doors to the master bedroom and guest bedroom, a deck beckons for dining and lounging. Having multiple levels makes the space more engaging and provides a feeling of spaciousness, says Kalina-Jones. Outside Space NYC Landscape Design Mindful of the clients’ concern about allergies, Kalina-Jones steered clear of aromatic plants, focusing instead on form and foliage. Plants were selected to provide interest year-round, in a display that varies with the seasons and attracts butterflies and bees.

The large grass is variegated Miscanthus, which blooms in fall. Cascading down behind it is Artemisia ‘Powis Castle’. At the far end is a Kwanzan cherry tree (Prunus serrulata ‘Kwanzan’). Outside Space NYC Landscape Design The ipe deck surrounds a lawn and a gas fire pit. To minimize maintenance, Jones chose XGrass Luxury Pro artificial turf from ProGreen. Unlike the synthetic grass of old, he says, today’s products look remarkably natural and feel soft underfoot. Drainage below the lawn takes care of rain. Outside Space NYC Landscape Design Thanks to soft nighttime lighting, the garden is equally appealing after the sun sets. Outside Space NYC Landscape Design Next: More ideas for urban gardening