I grow sweet potatoes in containers that I hang off of my deck. I like the foliage all summer and the small purple flowers. I grow my own slips. Here is a link to an earlier post with the starting of the sweet potato plants, https://mygardenmychickens.wordpress.com/2013/04/29/cold-frame-potting-shed-and-bunny-rabbit/.
I have 1 large round container and 4 rectangular containers (kitty litter buckets). To harvest I just dump them out into my wheelbarrow and pull off the potatoes.
Not a bad harvest, some large ones and a lot more small ones. I have them spread out on cardboard by the wood stove to cure before I store them in the cellar.
In my last post I wrote about pulling up my tomato plants. I want to add, that I DO NOT compost these plants. I bury them away from my garden. This is to help control the tomato blight. This blight would survive a compost season. It probably is in the soil but I feel better not mixing it with my compost.