I once accidentally grew sweet potatos in my kitchen - it was just sitting there for a while since I haven't used it, without rotting, and it started growing.
I'm trying to reproduce it, because I liked the result (the old ones died when I wasn't at home for a few weeks) - but no luck.
I guess they were growing and surviving from the vapor and humidity in the kitchen.
What should I do to reproduce it?
I saw this question regards how to grow it in water - but it's not what I'm looking for.