Okay please don't shun me for this but I tried to be aesthetically pleasing and humorous at the same time and I didn't expect this to work at all but there's a backstory to this I promise.
My mother's boyfriend also tried to throw it in the trash but I put it back in its bottle and the potato is fine. I'm sure you want to see a picture of this so here you go,a regular potato in a small figi bottle. Please help to give me advice on how to do this because it's sprouted and grown just by doing this.

Here is a close up.

Ok, so you're going to have to plant those puppies in the ground or a large pot somewhere. They won't grow plants like that. See where you're getting leaves on the right side of the potato? That is a new plant starting. Every "eye" on that potato might make a new plant. The eyes are the little things that look like belly buttons.

So you should cut the potato up into chunks, each with an eye, and let the cut edges dry, then plant each piece with an eye so that the eye can "see" the sun. i.e. bury the potato piece all except the eye.

Once the plant is growing, you should mound up the soil around the stems as it gets taller. That way the plant will produce more potatoes on the buried stems.

The way you have it growing now, it won't make a plant that will produce potatoes. In fact, I'm surprised the bottom part in the water hasn't rotted yet. Avocado will sprout like that, but not potatoes.

Thank you,I'm also surprised,I will try to do so soon.

I have cut the potato into fours,now I let it dry,yes?

Just until the cut surfaces are dry, not until the whole thing is dessicated.

@dyzzypyxxy Thank you,I've planted the potato and it seems to be doing quite well for the shirt amount of time it's been in the ground.

Where in Canada are you? Hope the soil is relatively warm so it won't rot instead of growing?

I'm from Vancouver originally, by the way.

The whole seed, that's essentially what your holding there. 😮😀👍
The whole seed needs to be buried, eyes and all. Why ??? Where the eye is attached to peice of potato, is where the first roots will form.
Bury seeds 4 to 6 inches deep. The price of potato will supply energy to the sprouts and roots, untell the sprout is out of ground and has roots, then it can take of itself.

Enjoy 😀
😎😎😎

@dyzzypyxxy I'm in Ontario,it's fairly warm right now.