I acquired this Umbrella plant (Schefflera) several years ago. It has been very slow growing, with one single stem. I tried just pinching the top a while back, which didn’t quite do what I had hoped, but the plant continues to put out new growth. If you look closely in the center, you can see a little baby leaf forming. When we get into the spring a little more, with the active season of growth, I am going to try one of those “drastic measures” you see crazy plant people do sometimes. I’m going to chop the top third or half of the plant off, and try rooting it. In theory this will force the remaining stem to put out multiple branches instead of just continuing with a single stalk. We’ll see!