Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Solanales
Family: Convolvulaceae
Tribe: Ipomoeeae
Genus: Ipomoea

youtube Growing Sweet Potatoes in Containers - Guide, Tips and Harvest

Fertilize initially, don't fertilize again to grow more tubers. -5 Tips How to Grow a Ton of Sweet Potato in One Container or Garden Bed
Tubers ruined after frost.
You may consider growing sweet potatoes as a ground cover in an open area where other plants are not being planted. Tall-growing plants more 24 inches are not affected as much by the spreading vines. Companion plants that grow well near sweet potatoes include dill, thyme, beets and parsnips. Avoid planting squash near sweet potatoes because of a similar vine spreading growth. sfgate
sfgate
sfgate Help to Sprout a Sweet Potato Faster
Sweet potatoes don't need as much water as other crops. Harvest in October. -OYR

Container Constraints
To grow ornamental sweet potato vines in pots, consider using large containers. Shoots can grow several feet long; to control this exuberance, trim them back or consider planting newer varieties bred for more upright growth or shorter nodes between leaves.
Companions
Although you can grow a sweet potato vine alone in a flower pot, or in combination with other ornamental sweet potatoes, they work well with other perennials or annuals.
sfgate Sweet Potato Vines for Flower Pots

About a month ago, I bought some organic sweet potatoes at Sunflower, cut them in half and put them cut-side down in a Pyrex lasagna tray filled with water

It was a bit slow at first but sure enough, thin white roots began snaking out from the cut ends submerged in the water.

The roots multiplied and grew thicker and the tops began to send out tentative feelers that unfurled into lovely, delicate purple-veined leaves that fade to green as they grow.

As the weather has warmed, they've started to take off, sending up shoots and lush, green leaves tipped with purple.

After another couple weeks of growth, the first slips had sprouted roots from the bases of their leaves -- these are different from the roots that sprouted from the cut ends of the potatoes. This was the sign I'd been waiting for that they were ready to plant in small pots which should give them a chance to get even more established before they go into the ground in a few weeks or so.

I cut the slips off and planted them in some mushroom dirt then put the potatoes back into the water so the other sprouts could continue to grow.

thegardenofeating The Great Sweet Potato Experiment
thespruce
Companions
These flavorful tubers are loaded with vitamin A. They grow best in soil with a pH between 4.5 and 5.5. Sweet potatoes need a long growing season and are difficult to grow in the north. If you live in a mild climate, though, you should have success.

Purple Yam

Clade: Angiosperms
Clade: Monocots
Order: Dioscoreales
Family: Dioscoreaceae
Genus: Dioscorea
Species: D. villosa
Binomial name
Dioscorea villosa