Philodendrons come in a multitude of varieties, with all sorts of leaf shapes and colors, most philos can be grown in low light. Some grow in a bush form like the selloum. Some varieties are trained to grow on a pole to create a slender upright shaped plant. These pole plants must be continuously pruned to keep the vines on the pole. If the pole is wooden it will eventually rot, causing the plant to lean over. Styrofoam poles will break if you're not careful.
These fast growing plants have vining tendencies. Most people prefer a full, leafy looking plant, so it is important to trim back new growth on the vine tips. This keeps the plant full and helps prevent the plant from looking stringy.
taken from http://www.evergrowing.com/tips/philodendron.htm