Plant Propagation: Sow Rock Cress seeds early in the season and cover lightly with 1/8″ of fine garden or potting soil. … Established plants can be propagated by division of the rootballs. Ideal plant spacing is 15″ -18″. Rock Cress plants will spread out to form a loose mat, filling in the space between plants.

Does rock cress come back every year?

Care of Rock Cress Plants Rock cress ground cover does well in fair soil that has good drainage and is slightly acidic. … Rock cress will bloom the second spring after planting and every year after that. Regular pruning to remove dead flowers will keep the plant healthy and encourage new growth.

Is rock cress the same as creeping phlox?

Aubrieta has the common names rock cress and false rock cress. … Mules’Aubrieta usually begins to bloom in mid to late April and continues into May. They bloom four to six weeks, which is twice as long as the popular creeping phlox. Plants rarely grow taller than 6 inches and may spread as far as 24 inches.