Catmint 'Six Hills Giant'

Also known as Nepeta
Typically grows in spreading clumps, up to 24-36 inches tall (60-90 cm) and 12-18 in. wide (30-45 cm).
This tall perennial will form a dense mound that looks wonderful in the middle of a sunny border alongside other blue or silver-leaved plants. Fresh or dried, the leaves make a refreshing and therapeutic tea which is high in vitamin C and has traditionally been used to treat such conditions as nervousness, insomnia, hyperactivity, colds and fevers. The flowers are highly attractive to bees, and of course, the foliage to cats, who will go mad for it.