Butterfly Bush flower seed, otherwise known as
Summer Lilac, is a butterfly-attracting aromatic bush that has narrow branches supporting lilac-like clusters of blossoms a foot or two in length, with side branches and blossoms. You might even attract a hummingbird. If the winter is hard enough, the plant can die back go the ground. If it doesn't, each spring (prior to new growth) the bush should be trimmed to 10 inches. The plant will bloom on the new growth and will have fuller, larger blooms. Once established, the bush prefers a slightly moist to dry soil, and is drought tolerant.
To keep the bush flowering, the flowers need to be dead headed once the color begins to fade.
Butterfly Bush Mix Flower seed has all the above characteristics plus the added bonus of different shades of lilac and white! While hummingbirds prefer the darker bloom colors, butterflies prefer the lighter bloom colors, so you have the best chance of attracting both with this mix.