A lush green lawn has long been a symbol of the perfect American home. But as a prolonged drought reshapes life in California, many residents are rethinking what a beautiful yard should look like. In Los Angeles, which imposed sweeping restrictions on outdoor water use this year, thirsty lawns are out – and California native plants are in. From mansions in Brentwood to old family homes in Koreatown to neighborhoods in South LA, Angelenos are installing climate-friendly yards full of California buckwheat, toyon, sage, and succulents, and building in garden features to help conserve and retain the state’s limited rainwater. The choice to conserve may be contagious. Starting this June,…