(via Botanic Superlatives: The World’s Largest Vertical Garden | Garden Design)
Vertical gardens have grown a lot since 1988, when French botanist Patrick Blanc first experimented growing plants without dirt—on a wall. Their popularity seems limited only by its design, which has been demystified as a fairly straightforward system of a water source, a frame, and a couple layers of felt or wool. Restaurants in Mexico and studios in Manhattan now grow walls of philodendrons, ivies, ferns, bromeliads, begonias, and hoyas. And they’ve been growing bigger. A living wall in Milan was recently granted the superlative title of world’s largest. Designed by architect Francesco Bollani, the vertical garden carpets 13,600 square feet of an Italian mall’s facade.