Both discreet and intense, this centaurea is a foliage plant par excellence, a must-have for edging, rock gardens and combination planting where contrast and texture is key. A.k.a. Mountain cornflower or knapweed, ruffled leaves are a shimmering silver-white. Not a fussy plant where watering is concerned, it is adaptable to many growing conditions. With a compact mound, plants have excellent disease and pest resistance.