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[–] Tsilent_Tsunami 0 points 2 points (+2|-0) ago 

I've read about people adding more dirt around potato plants as they grow, and causing them to produce potatoes all the way up. Either adding rings around the plant and filling with dirt, or growing in a deep container, like a plastic trash can.

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[–] NamelessCrewmember 0 points 2 points (+2|-0) ago 

Wine barrels are good. Some custom containers allow partial harvest front the bottom up, preserving the rest through winter.