Wash your "seed potatoes" (scrub lightly but thoroughly with a brush) with fresh water to remove any anti-sprouting chemicals/hormones that might have been applied. Then prepare a pot or 1 gallon nursery container, fill it with potting mix (not soil, potting mix). Put one or two seed potatoes on top of the potting mix, about half buried in the mix, but half exposed.
At that point they need warmth (70F + soil temperature) and lots of (sun)light. A heat mat/heating pad helps. Keeping them in a warm room in your house helps. Intense (close up) artificial light helps, if your warmest spots aren't in the direct sunlight for most of the day.
Sweet potatoes don't have any GPS or other 'location sensors' which could cause them to fail. If they have heat and light, they sprout.
