Needing better autumn and even winter interest? Ajuga is a great ground cover that will keep its foliage and its color, even into the colder months. Ajuga 'Midnight Mystery' happens to keep a dark and rich color. In spring, its spoon-shaped foliage appears in coppery tones. As the summer heat warms the plant, copper turns to dark purple, and this is the color that sets off rose-pink blooms and then stays intact even when the flower spikes have gone and the temperature drops. A very dramatic plant! Locate it near plants with chartreuse foliage for a stunning contrast.