holy stretch!!! Iv never seen one that bad, damn. Its alright though, yeh either tie it to a popsicle stick.. or any stick. Or pile the soil up. I dont think the stem is goign to root though where you piled the soil up, unless you use a razor and cut threw the bark, into the xylem, and apply rooting hormones, that would work, and if done correctly would give you a bigger yeild. That is the best coarse of action, but it is a semi difficult manuver, but would be worth the risk if you do it. They might be a bit small now however, so for the time being just give them support, when stem gets a bit thicker you might want to think about trying out this technique. Good luck buddy, Grow on : )