/diy/ - Do It Yourself

I understand how to grow potatoes and have done so in the past, although I get conflicting stories about what to do after. Unsurprisingly, the seed store tries to convince me that I should buy new seed potatos every year. The internet says you shouldn't grow potatoes in the same spot because reasons.

But I want to grow a continuous supply of potatoes. Is this possible? I live on the west coast of the usa and only get light frost during the winter. I can't seem to find relevant information on the natural life cycle of a potato. Are potatoes so domesticated, like corn, that they cant grow naturally? Do you have to harvest your own seed potatoes and just hold onto them until spring?