Primula marginata 'Alba' is a broadleaf evergreen perennial with blue foliage. In spring white flowers emerge. Grows well with sun - mostly sun and low water. Does well in rocky soil. A good option if you're seeking something verticillium wilt resistant.
The very rare and equally slow growing white form. Grows in most well drained garden soils. Full sun is fine in higher elevation and/or cooler regions, otherwise needs a place without afternoon heat. For the front of borders, rock gardens and troughs.