Urban gardens go vertical

Barthelmes Manufacturing Company told The New York Times that a growing part of the company’s business is being devoted to something decidedly unindustrial: edible walls — metal panels filled with soil and seeds and hung vertically.
“The traditional metal fabrication industry is shrinking, and green is an emerging area,” said Larry Lehning, the chief executive at Barthelmes, whose sales of green products have doubled this year and make up 15 percent of the company’s revenue. Edible walls — descendants of espalier, or trees grown against walls that were popular during the Middle Ages in Europe — are just one small attempt to grow food in cities.
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