The Jewel of Desert Delosperma's are an absolute breakthrough. They make your garden smile. A new generation of Delosperma's that bloom extremely long from spring until frost occurs. The Jewel of Desert-series consists of all sorts of colours. Jewel of Desert Moon Stone has white flowers. The plant can stand drought very well and is hardy up to -13 degrees Fahrenheit. Moon Stone is up to 6" high and wide. Loves the sun.