Blue wild indigo is a native to the U.S., but it is not actually indigo. It is called blue wild indigo because the Cherokee used it as a blue dye. Blue wild indigo is hardy through zones 3 to 10 and grows well outside of its native areas. Pruning it is just as easy as growing it. This native perennial requires so little care that it takes less time to prune wild blue indigo than it does to plant it.
Prune wild blue indigo in the summer after it has stopped blooming. If you live in a cold climate, this gives the plant time to fill out from winter dieback and time for you to enjoy the little blue flowers.
Cut off any dead or damaged foliage at the base of the blue wild indigo. This will improve the health and appearance of the plant.
Trim off the dead flower stalks. They should have seed pods on them now and will have to be removed as well. Trim off the stalks at the base of the wild blue indigo.
Trim back the wild blue indigo by 1/3. This will help keep the plant in its intended shape and keep it from over-reaching its bounds in your garden.
Trim your blue wild indigo into its intended shape. This will give the plant a neater look in your garden.