How can I successfully grow purple sweet potatoes in my garden?

To successfully grow purple sweet potatoes in your garden, you should start by selecting a sunny spot with well-drained soil. Plant the sweet potato slips in the spring after the last frost, making sure to space them about 12 inches apart. Water the plants regularly, keeping the soil consistently moist but not waterlogged. Fertilize the plants with a balanced fertilizer every few weeks. Harvest the sweet potatoes in the fall once the leaves start to yellow and die back.