Chinese Indigo (Indigofera amblyantha) is one of my favorite plants. It is truly a low maintenance plant and it grows in one of the most difficult areas of the garden. A large grove of huge hackberry trees sits behind the garage and this area has proven to be a challenge. The soil is very dry and the addition of raised beds hasn't exactly been successful. The Indigo bush, however, sits happily on a raised berm where it endures drought, heavy shade and neglect. The pale lilac to rose pink blooms appear in May and stay on the bush for a long time (months it seems). I had read that indigofera is a spreading plant but that is not the case here. It forms a 3-4 ft. tall plant with equal width and doesn't wander. You will find different types of indigofera on the market. There are lower, spreading types (Indigofera kirilowii and Indigofera decora) that I have not tried growing. All of these types are commonly referred to as "Chinese Indigo" and grow in similar conditions.