you can use those twisty ties (is that what they are called).. those things that ties the bag of bread or garbage bags... you can tape one end to the pot or whatever and use the other end as a hook... its easier than string and its less scary when it comes to handling the plant...
i don't know if you're able to buy them, but i save a couple whenever i see them, especially the longer ones that sometimes comes boxes when its a toy gun for kids. they would use it instead of styrofoam, to tie it down to the back of the box....