BLOOM TIME: Summer HARDINESS ZONE: 3 - 10 PLANT HEIGHT: 24 - 48" . . . PLANT SPACING: 15 - 18" LIGHT REQUIREMENTS: Sun - Part Shade . . . SOIL / WATER: Average - Dry Prairie Sage is a wonderful fragrant ground cover. It has silvery white foliage with yellow flowers. Artemisia ludoviciana is North American species in the daisy family, known by several common names, including silver wormwood, western mugwort, Louisiana wormwood, white sagebrush, and gray sage wort. Prairie Sage is a wonderful fragrant ground cover. It has silvery white foliage with yellow flowers. LIGHT REQUIREMENTS: Sun - Part Shade . . . SOIL / WATER: Average - Dry. BLOOM TIME: Summer. HARDINESS ZONE: 3 - 10.