What do I need to do to winter over this plant? I've been reading all kinds of articles and no one mentions what to do to try to winter over this plant. I am in zone 5a. Should I cut it back to 2-3 inches cover with hay and pray it comes back next year?
This article should answer your question: https://www.gardeningknowhow.com/ornamental/flowers/cardinal-flower/growing-cardinal-flowers.htm