Bamboo; pick up a bundle for dirt cheap at any local nursery. I'm lucky enough to grow my own bamboo (don't worry, I'm not neurotic enough to grow bamboo solely for this purpose - I just like it). Yesterday I had to spray a plant for powder mildew
and she started listing severely. I panicked for a second and my girl said, "um...you have, like, a whole bamboo forest, man - stake her up!" What can I say? Stupid simple.