Are You Root Bound?

For Christmas, my neighbor gave me a Poinsettia with beautiful red leaves. By Easter, all the leaves had dried and fallen off. I started to trash it but noticed some small green leaves. So, I kept it, not knowing what to do with it. Even though I fertilized and watered it, the leaves are still small, and some fell off. Just as I was thinking of tossing it, I heard the words, “Rootbound”.