|The cultivar 'Compactum' has hairy gray-green leaves to 3 inches long which grow in low, mounded clusters. Flowers grow on stalks above foliage. Produces dense clusters of tiny golden yellow flowers in spring and early summer. Useful as a foreground planting in borders, in rock gardens or along walls. Self-sows readily. Hardy to zone 2b, this perennial should be kept moist until completely established. Average water is needed during the growing season. Fertilize in spring just before new growth begins. Shear back after flowering to shape. Grows to about 6 to 12 inches tall and wide.