How to Grow Sweet Potatoes in the South: The Ultimate Deep South Crop

Sweet Potatoes: The Perfect Deep South Crop

If there is one vegetable crop that was made for Southern gardeners, it is the sweet potato. Sweet potatoes (Ipomoea batatas) are a native American crop that has been grown in the South for centuries, and for good reason: they are extraordinarily productive, heat-tolerant, drought-resistant, and nutritious. In Florida and across zones 8b through 11, sweet potatoes grow abundantly during the long, hot growing season, producing generous yields with minimal inputs.

Unlike most vegetables that struggle in Florida's brutal summer heat, sweet potatoes actually thrive in it. Once established, they spread vigorously, cover the ground with beautiful heart-shaped leaves, suppress weeds naturally, and produce both edible roots and edible greens, making them one of the highest-yield crops available to Southern food gardeners.

Best Sweet Potato Varieties for Florida and the South

Beauregard

Beauregard is the most commonly grown commercial sweet potato in the South and for good reason. It produces large, uniform, orange-fleshed roots with excellent flavor. It matures in approximately 90 to 100 days and performs reliably in Florida's summer heat. This is the best all-around choice for most Southern gardeners.

Covington

Covington sweet potato is a newer variety that has become popular across the Southeast for its consistent production, disease resistance, and excellent sweet flavor. Moist orange flesh, good storage life, and strong vine growth make it an excellent choice for Florida and the Deep South.

Porto Rico (Bush Porto Rico)

Porto Rico produces compact vines that work beautifully in raised beds and smaller spaces. Its moist, orange flesh is exceptionally sweet and flavorful. This is a great variety for home gardens where space is limited.

Purple Sweet Potato (Okinawa)

Purple or Okinawan sweet potato varieties produce striking purple-fleshed roots that are loaded with anthocyanins, powerful antioxidants. They grow extremely well in Florida's climate and are popular in health-conscious gardens. The flesh turns bright purple when cooked, making them visually dramatic in dishes.

White Yam (Boniato)

Boniato (also called Cuban sweet potato or batata) is a white-fleshed sweet potato that is widely grown in South Florida and popular in Caribbean and Latin American cooking. Less sweet than orange varieties, it has a dry, fluffy texture similar to regular potatoes. Grows year-round in zones 10 through 11.

Planting Sweet Potatoes in Florida

When to Plant

Plant sweet potato slips from March through June in most of Florida and the Deep South. The soil should be consistently warm (above 65°F) before planting. In South Florida zones 10 through 11, sweet potatoes can be planted and grown virtually year-round. In Zone 8b, plant after the last frost date (typically late February through March).

Starting Slips

Sweet potatoes are grown from slips, sprouted cuttings taken from mature sweet potato roots. To grow your own slips, place a sweet potato partially submerged in water in a warm, sunny location. Slips (small sprouts) will emerge from the potato within 2 to 4 weeks. Separate individual slips when they reach 4 to 6 inches long and root them in water before planting out.

Soil Preparation

Sweet potatoes prefer loose, well-draining soil. Florida's sandy soil is actually ideal for sweet potato production, compacted or clay-heavy soils prevent root development and produce misshapen, poorly sized roots. Till beds to 10 to 12 inches deep, form raised rows or mounds 6 to 8 inches high, and plant slips on top. Minimal fertilizer is needed, excessive nitrogen produces lush vines at the expense of root development.

Planting and Spacing

Plant slips 12 to 18 inches apart in rows spaced 3 to 4 feet apart. Set slips deeply (bury 2 to 3 nodes underground) for maximum rooting and root production. Water well after planting and provide consistent moisture for the first 2 weeks while slips establish.

Sweet Potato Vine as Ground Cover

One of the best uses of sweet potato in the Southern edible garden is as a living ground cover and edible green. The leaves and growing tips of sweet potato vines are edible and nutritious, high in vitamins A, C, and K. Use them like spinach in stir-fries, salads, soups, or sauteed as a side dish. Growing sweet potatoes as ground cover between taller food plants in a food forest system provides soil coverage, weed suppression, and a continuous harvest of nutritious greens while developing roots underground.

Harvesting and Storing Sweet Potatoes

Harvest sweet potatoes 90 to 120 days after planting when vines begin to yellow and die back. Carefully dig roots with a garden fork to avoid damaging the skin. Cure freshly harvested sweet potatoes in a warm (80 to 85°F), humid location for 10 to 14 days to develop sweetness and improve storage life. Properly cured sweet potatoes store for 4 to 6 months in a cool, dry location.

Your Complete Florida Garden Guide

Sweet potatoes are just one of 50+ plants that thrive in Florida's unique climate. For a complete guide to the best food crops for Florida and the Deep South, check out The Florida Grow List: 50+ Plants That Won't Let You Down.

Frequently Asked Questions

Can you grow sweet potatoes year-round in Florida?

In South Florida zones 10 through 11, sweet potatoes grow essentially year-round. In most of Florida, the primary growing season is April through November. The vines die back in cold weather but the roots can survive in the ground in zones 9 through 11.

How much water do sweet potatoes need in Florida?

Sweet potatoes are drought-tolerant once established. They need consistent moisture for the first few weeks after planting slips, but mature vines can tolerate Florida's dry season with minimal supplemental watering. Overwatering can cause root rot, especially in poorly draining soils.