A tree living in nature on a steep cliff can bend downward as a result of several factors, like snow or falling rocks. These factors cause the tree to grow downwards. With Bonsai it can be difficult to maintain a downward-growing tree because the direction of growth opposes the tree’s natural tendency to grow upright. Cascade Bonsai are planted in tall pots. The tree should grow upright for a small stretch but then bend downward. The crown of the tree usually grows above the rim of the pot, but the subsequent branches alternate left and right on the outermost curves of an S-shaped trunk. These branchings should grow out horizontally in order to maintain balance of the tree.