36" tall x 20" wide (cutting/seed propagated). This Mediterranean species, native to the mountains of Syria, is admired for both its unusual whorls of soft yellow flowers and its large olive-green leaves. Phlomis russeliana (commonly known as Hardy Jerusalem Sage) has proven to be quite cold tolerant. A very tough and easy-to-grow plant, Phlomis adds an eye catching structure to the garden, combining readily with other perennials with interesting foliage, like Gray Santolina.