Woolly Pocket Garden 'Wally One' The easiest way to create your own vertical garden on just about any type of wall or fence, indoors or out. Like building blocks, pocket gardens are easy to install and totally modular. Made from 100% recycled plastic water bottles. The pockets are soft and allow the plants to breathe. The lined pockets are for indoors and are water-tight. The outdoor pockets are unlined and allow the water to drain. measures 15 inches high and 24 inches wide.