Ajuga genevensis​ Carpet Bugle​ - ​Mat-like lush green ground cover for the sun or shade. Blue flower spikes blanket the foliage appearing in May and June. Place Ajuga Genevensis along walkways or among stepping stones. Ajuga are extremely hardy groundcovers that quickly form a dense carpet-like mat. Our plant spacing recommendations are based on how quickly these plants will spread in their first season of growth.​