Should I bring my plant inside for the winter? And how do I treat it? This is a first year plant.
While most types of butterfly bush are only hardy to zone 5, with appropriate care, they can be successfully overwintered. Assuming your is in a container, its care is somewhat different than those grown in ground. This article should help with caring for your bush over winter:https://www.gardeningknowhow.com/ornamental/shrubs/butterfly-bush/overwinter-a-butterfly-bush.htm