(Formerly Alyssum) Among the most popular of spring-flowering perennials, this is a common sight in rock gardens. This forms a low bushy mound of grey-green leaves, smothered in masses of tiny, bright golden-yellow flowers for several weeks. A good choice for edging, rock walls or in mixed containers. Often planted alongside other spring blooming rock garden plants, such as Arabis or Aubrieta, and combines beautifully with spring flowering bulbs of all types. Clip plants back by half, immediately after blooming. Not easily divided. Drought tolerant. Evergreen.