Vertical gardens can be a fashionable way to fill wall space and create an extra dimension in small urban gardens, writes Kate Weinberg. The most popular plants for vertical gardens include sedums, ferns, succulents and heuchera, she notes. A vertical garden requires a frame for support, a backboard adhered or riveted onto the frame, a thick layer of felt or hessian stapled to the backboard to serve as a holding sheet and some type of irrigation to sustain the plants.

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