I must admit to you that River Birch is not one of my favorite trees. But the other day when I saw this grouping planted against the blank wall, as shown above, I thought it was striking and a stunning winter look. Their stark, sculptural, upright willowy branches and exfoliating bark make for an outstanding winter show. The reason they are not one of my favorite trees is that they always seem to have some type of bug that causes leaf drop in summer. Also, as they age, you are always picking up small twigs in winter. On the plus side, as trees go, they are cheap to buy and grow quickly. As the name implies, they do like moist locations best.