Coleus is a great annual to add height and interesting foliage to your planter or annual bed. They come in a huge variety of colors, as well as varieties for both sun and shade. It is a good idea to regularly fertilize your coleus and pinch them back from time to time to prevent them from getting excessively tall. Since these plants are primarily grown for their foliage, most gardeners will pinch off the flower stalks when they begin to emerge from the top of the stem.