[header] How to grow oca [title] Sprout your oca tubers before planting them. [step] Like potatoes, oca is most often grown from last season's tubers. These seed tubers can be held back from your own crop or purchased at a garden store. 
Place the tubers on a tray where they will receive direct sunlight and the temperature is somewhere between 60 and 70 ° f (16 and 21 ° c). [substeps] Leave tubers on the sprouting tray 1 to 2 weeks.