Peel and cut the sweet potatoes into 1-inch chunks.

Cut the sweet onion into 1-inch chunks.

Combine sweet potatoes, carrots, and onion in a slow cooker.

In a bowl, stir together white grape juice, applesauce, and water.

Pour half of the grape juice mixture over the vegetables in the slow cooker.

Place the pork roast on top of the vegetables.

Pour the remaining grape juice mixture over the pork.

Cook on Low for 10 hours.

Ladle accumulated juices over the roast when serving.