Try an Invisible Trellis

" To take a climbing vine to new heights, try this! Fishing wire, that's all it takes to create an invisible trellis that gives your twining vine that foothold they need in order to climb. So, just tie your fishing wire to a hook on the ceiling, and you just let it dangle down. The plant will actually detect the wire's presence and will just grab on and start climbing. I mean nature is really amazing! Now, if you want you could tie a sinker to the bottom of the fishing line to make it nice and straight, but you really don't have to do that. This is a great tip to use with morning glories, passion flowers, or mandevilla. Now, a bit of interesting trivia about these twining vines, certain species will only grow in certain directions. So, if you've got a plant that grows in a counterclockwise curl, you won't be able to train it to grow clockwise. It's just won't to do it. It's really weird. But test it out on your own and create an easy invisible trellis that will take your plants to new heights."