Sedum spathulifolium is a native of the western coastal mountains from Canada to northern California. One cultivar is 'Capo Blanco' which is cold tolerant and drought tolerant perennial. They are low-growing with mats of tiny white rosettes atop stems. The leaves are silver white with reddish margins. Generally they grow on ledges or cliffs. They have yellow star-shaped flowers during summer. They grow well on windowsills or as an accent in rock or dish gardens. You can combine oher sedums or sempervivums for an alpine look. They adapt to sandy or poor soils. They need Bright light and good airflow. Water thoroughly when the soil is dry.