At its most basic, a green roof consists of a carpet of hard-to-kill plants in a thin layer of soil. Luxury homeowners, however, are opting for bespoke greenscapes as carefully curated — and sometimes as costly — as art collections. With the right design, these eco-chic gardens also add insulation, absorb storm water runoff and deflect heat from the sun.
David and Henrie Whitcomb’s vertical garden redeemed a chunk of unusable space on their 2,500-square-foot wraparound terrace in New York’s Greenwich Village. The green wall must be replanted each spring, “based on what plants will survive there, and what plants will hold the soil,” said Emma Decaires, the Whitcombs’ horticulturalist. “I’m guessing that it might have been, by itself, a half-million dollar installation,” said Mr. Whitcomb.
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