We've grown potatoes in a few different ways - in leftover chicken food bags as containers, in buckets, and on the ground in hay/straw. In my experience, it's not too difficult to get a pretty decent yield. I think next year we're going to try sweet potatoes.
Sweet potatoes are super easy, just leave them on the counter till they sprout, snap off some of the sprouts and stick the sprouts in the soil. They take all season to grow and then you have to harvest and leave them in a cool dark place for a few weeks to let the starch even out or something. But the will grow like the are fucking invasive amazing yields too. I had some in a raised container, the vine got out and now have some growing along side of my house.
I tried growing some in a big planter before but it was kind of paltry. I also grew them in the ground but I think I dug them up too early, and all I got were new potatoes.
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