When I planted a container of beets back in July there were a few that didn't germinate so I reseeded those spots with watermelon radish seed. Just a couple of spots (in container gardening, every square inch is precious). That was two months ago. They looked ready to eat so I pulled them up this morning and sliced into one.
I like growing them because they don't ask for much and as far as radishes go, have a mild yet radishy taste. Maybe I'll slice these up and store them in some brine for a couple days. Pickled Radish? Why not.