I have a heart-shaped potato I want to keep its shape. How can I preserve it? It's already beginning to look just a tiny bit different. I searched google, but nobody's talking about preserving a whole potato.
Cut it thin and deep fry it.
Heart shaped potato chips.. mmmm!
Take a photo of it, that will last longer.
Keep it in the freezer.
You could try using one of those "Food Savers" and place it in the deep freezer. There's really nothing outside of "canning" to preserve a whole potato other than freezing it. It will probably be useless for any other purpose than a conversation piece, but it will keep it from turning colors in the freezer by using a typical freezer bag alone.
My foodsavers worth it's weight in gold around harvest time...just need a freezer the size of a house!
Potato tubers were designed to keep in the ground, for nearly a year in correct circumstances. A tuber taken off the plant early in the growth cycle can't keep; also tubers grown in certain climates won't keep.
I've taken tubers out of the ground in early May, from the season before, that were in perfect eating condition.