When Esther Hayden moved into her Seven Oaks home in 1990, the hillside in her backyard — similar to many found throughout Rancho Bernardo — had mostly ground cover and was spotted with a few trees.
Hadi and Charlotte Zalzalah’s hillside garden in Paso Robles mixes plants of different heights and colors. Tami Reece Special to The Tribune When Hadi and Charlotte Zalzalah bought their home in Paso ...