I've long wondered about these as people food, both roots and leaves since in Colorado I got to eat sugar beets from the fields. I might be pushing my luck trying them in a baby pool garden, time will tell. Since beets and chard are the same species, Beta vulgaris, I could well have an abundant new source of greens until the roots mature, IF they do well for me.

http://www.everwilde.com/store/Red-Mammoth-Fodder-Beet-Seeds.html