Growing Sweet Potatoes in the South: The Ultimate Crop for Hot Summers

Why Sweet Potatoes Are Perfect for the South

Sweet potatoes were practically made for the South. They love heat, tolerate drought, fix nitrogen in the soil, and can feed a family from a surprisingly small space. Unlike most vegetables that slow down or stop producing in the peak of summer, sweet potatoes thrive when temperatures climb into the 90s. They are also one of the most nutritious crops you can grow, packed with vitamins, fiber, and antioxidants.

If you live anywhere from Virginia to Texas and have not grown sweet potatoes yet, this season is the time to start.

When to Plant Sweet Potatoes in the South

Plant sweet potato slips after the last frost when soil temperatures are consistently above 65 degrees. In most of the Deep South, this means April through June. In Florida and along the Gulf Coast, you can plant as early as March and even into July for a late fall harvest. In North Carolina and Virginia, late May is typically safe. Sweet potatoes need 90 to 120 days to mature, so plant early enough to get a full harvest before first frost in the fall.

Slips vs. Sprouting Your Own

Sweet potatoes are planted from slips, which are small rooted cuttings sprouted from a mature potato. You can buy slips from garden centers or online, or you can sprout your own at home. To sprout your own, half-submerge a sweet potato in water with toothpicks and leave it in a warm, sunny window. Slips will sprout from the potato in about three to four weeks. Twist them off when they are 4 to 6 inches long and plant them in the garden.

Growing your own slips from an organic sweet potato you enjoyed from the farmers market is completely free and produces excellent results.

Soil and Planting

Sweet potatoes prefer loose, well-drained soil. Sandy southern soils are actually ideal, as the loose texture allows roots to expand freely. Avoid heavily amended soil with too much nitrogen, which pushes leafy growth at the expense of root development. Work in a bit of compost and some wood ash for potassium, which supports root growth, and you are set.

Plant slips about a foot apart in rows three feet apart, setting them deep enough that only the top few leaves are above soil. Water well after planting and keep moist for the first week until they establish. After that, sweet potatoes are surprisingly drought tolerant and rarely need watering once the vines spread.

Managing the Vines

Sweet potato vines spread aggressively, sometimes covering a 10 foot radius from each plant. This is actually a benefit since the thick vine mat suppresses weeds and keeps soil cool and moist. Do not worry about trimming vines unless they are invading spaces you need clear. Avoid turning the vines since disturbing them can interrupt root development.

Deer and voles are the two biggest pest threats to sweet potatoes in the South. A simple fence handles deer. For voles, keeping a clean perimeter around the bed without dense vegetation nearby helps reduce pressure.

Harvesting and Curing

Harvest sweet potatoes after the vines start to yellow, typically 90 to 120 days after planting, or before the first frost. Dig carefully with a garden fork, starting well away from the plant to avoid cutting tubers. Sweet potatoes need to be cured before eating to develop their best flavor. Store them in a warm, humid spot around 80 degrees for 10 to 14 days. After curing, they can be stored for months in a cool, dry location.

A Complete Guide to Southern Food Growing

Sweet potatoes are one of the foundation crops in any productive southern garden. To build a complete growing system that works with the South's unique climate and seasons, the Florida Grow List covers 50 crops proven to thrive from zone 8b through zone 11, including variety selections and planting tips specific to southern growing conditions.