Kitty-attracting perennial with gray-green leaves and white flowers. Markets for catnip include cat toy crafters, herbal tea companies, and retail plant sales. Flowers are very attractive to bees. Medicinal: Leaves and flowering tops are used as a gentle antispasmodic and very mild sedative. 10 times more powerful than DEET. My daughter calls this Kitty Crack and it is that. But it is also a wonderful stomach tonic for humans, and has other applications to your health as well.