Ipomoea Tri-Color
 

The ornamental sweet potatos (Ipomoea batatas) are fast growing, twining vines with palmately lobed leaves.

Plant in reasonably good, loose, well drained soil, and water as needed. Once established, the plant is not particularly "thirsty," since the underground tuber retains enough water to get through some dry spells. Cut often if needed to control for size and to create more branching. The vines are vigorous and will put on new growth immediately. 
Plant in Full sun.  Average watering - leaves droop when the vine needs water.