The Weiners’ first stab at a decorative green roof went awry when workers installed the fabric membrane incorrectly; the plants didn’t thrive, and
soil leached down the drain, causing a backup in the yard below. But with the help of an artist friend—–and avid gardener—–they successfully brought a piece of cultivated wildness, including hardy flora like creeping thyme, honeysuckle, hops, and kiwi, to their roof.