Our introductory Green Team blog addressed a common misconception: There is no space left for new landscapes in New York City, the dense urban expanse that is our home turf. In fact, there are available spaces, but they’re likely to come with some complex problems. Finding ourselves wrestling with small, challenging, and limited spaces, we sometimes take an unexpected approach. We look up!
Our initial site analysis for New York projects—and others—entails, in part, identifying ALL available space than can be improved. Crisp, white walls may be de rigueur for the interior artist, but they are far too banal for a vibrant, metropolitan landscape. By using a site’s vertical surfaces, we can expand the benefits of a project to include increased planting areas, aesthetically appealing live or inanimate screens, thoughtfully designed edge conditions, improved views, reduced cooling requirements for adjacent buildings, and the mitigation of urban heat island effect (UHI), thus furthering the definition of “the space.”
The design of exterior vertical surfaces can take on many forms and configurations including green screens, green walls, cable trellis systems, wall-mounted planters, trellises, and planters housing fastigiate (columnar) species, to name a few. The selection of the proper treatment for these surfaces is based on sun/shade conditions, design intent, the structural capacity of the surface to receive the enhancement, available soil volume for plants, and so on. If we propose a woven wire or cable trellis system, we must consider the method of its attachment to the building’s surface as well as whether the receiving wall or support structure can sustain its weight load in addition to the living, twining plants that will grow over the plane. Some factors that influence plant selection, as well as the ultimate success of the installation, are planters, soil volume, irrigation, and solar orientation.
We work with a wide variety of systems and approaches on vertical landscapes throughout the city. At Spring Street Plaza, a 200-foot-long wall abutting the adjacent building was designed and installed to allow us to use a vertical screen system for vines. This wall provided the structural support for the vegetated system while ensuring that no portion of the work was attached to or interfered with the structure of the neighboring property (our post on property lines talks about the consequences of this). Once installed, the green screen, with its dense vine cover comprising six vine species, provided a sense of enclosure for the plaza, acting as a vegetated backdrop to the small “rooms” of the plaza design. The wire grid also provided structure for the installation of custom light tubes into the screen, creating a playful effect of illuminated planting at night. The 10-foot height of the new wall—a pedestrian scale intervention— also helps deemphasize the presence of the adjacent building.

A view south across one of the seating “rooms” of the plaza showing the vine-covered green screen along the western edge of the site. Photo courtesy Elizabeth Felicella

Light tubes inserted into pockets in the wire grid screen accent the vines and illuminate the site. Photo courtesy Elizabeth Felicella
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