This type of Wall Cress forms a low carpet of dark-green leaves that remain evergreen. Short stems of fragrant snow-white flowers last for several weeks in the spring. Makes a nice groundcover for a small area. Especially good for a pathway edging, between flagstones, in the rock garden or alpine trough. Plants are drought tolerant, once established. Easily divided in early fall or just after flowering or in early autumn just sneak away small portions or dig up the whole plant and cut apart into smaller sections. Likely hardy to Zone 3 or colder.