Ask any gardener: If you’re looking for instant gratification, look elsewhere. Unless, that is, you’re a client of Harrison Green—the New York landscape firm that specializes in lush city terraces, allées, and rooftops for the likes of Marc Jacobs, The Row, and even MoMA. “You can create an outdoor room in a day,” says Jacqueline Harrison, who founded the company with her husband, Damien, in 2013.
As a design/build firm, Harrison Green prides itself on nurturing urban plots from inception to installation and then some, with regular maintenance as part of the package. For Manhattan’s Baccarat Hotel, the team installed great spheres of boxwood in Versailles planters and a three-story ivy treillage to evoke the formality of 18th-century France; for Jacobs, they marshaled ferns, hosta, ivy, viburnum, and a noble…