Agence France-Presse: Even grinding recession has not undone growth in one corner of California’s drought-parched landscaping sector, where Robert Cornell has spent more than two decades fine-tuning climate friendly gardens. In Pasadena, a wealthy suburban area northeast of Los Angeles, amid the rows of luxurious flowers and freshly mowed lawns, there is little sign that California is in a drought emergency after three years of sparse rains. Nor do passersby see any clues that this type of …