Some say plant what thrives in your area, otherwise just a hobby food.
Since they are a mountain plant I do like the wildish strange blue one. Don’t look like potatoes but taste much better than the modern ones, for me that is.
I’ve thought about colloidal copper, easy to make, but your trying to avoid that. At the top of a roof ridge copper sheeting was placed and that was reported to stop roof mold or what ever. It was reported that a silver coin placed in milk kept it from going bad, maybe BS. Maybe a copper pipe plus a rain water catch that sprinkles on top of Mr. Potato.
Always harder to pump water up hill.