How to Grow Sweet Potato

Sweet Potato

Ipomoea batatas

vegetable

Sweet potatoes are a warm-season perennial crop grown as an annual, producing starchy tuberous roots with sweet, orange or purple flesh. They are a nutritious staple crop that thrives in warm climates and produces vining foliage above ground while developing tender roots below. The plant is unrelated to common potatoes and is more closely allied to morning glories.

Looking for a specific variety?

Beauregard Georgia Jet Covington Okinawan Purple Jewel

Growing Conditions

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Sun: Full sun, 6-8 hours daily; prefers maximum sunlight for best yield

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Water: Moderate and consistent moisture; requires 1-1.5 inches per week during growing season. Reduce watering as harvest approaches to avoid cracking. Drought-tolerant once established compared to regular potatoes.

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Spacing: 12 inches

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Days to maturity: 90-150

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Planting depth: Plant slips 1 inch deep; place whole roots 4-6 inches deep if using seed potatoes

Soil

Type: Well-draining, sandy loam or loose soil

pH: 5.9-6.3

Amendments:

Aged compost Perlite or sand for drainage Potassium-rich fertilizer Avoid excessive nitrogen

Growing Zones

Find your zone →

Zones 8-11; can be grown in zone 7 with a long growing season and careful cultivation

8a 8b 9a 9b 10a 10b 11a 11b

Growth Stages

Slip Development

6-8 weeks

Small shoots with roots emerging from seed potatoes placed in warm, moist conditions indoors

Start seed potatoes 6-8 weeks before last frost in a warm location (70-80°F). Keep soil consistently moist. Slips are ready when they develop 4-6 leaves and roots.

Establishment

2-3 weeks

Young transplanted slips developing new leaves and establishing root systems in the field after soil reaches 60°F

Plant slips after soil warms to 60°F minimum (ideally 70°F+). Keep consistently moist for 2-3 weeks. Mulch to retain moisture and regulate soil temperature.

Vegetative Growth

6-10 weeks

Vigorous vine growth spreading across the bed, producing large heart-shaped leaves and developing underground tubers

Monitor vines for even coverage. Maintain consistent moisture without waterlogging. Apply balanced fertilizer mid-season; avoid excess nitrogen which promotes foliage at expense of tubers.

Tuber Development

4-8 weeks

Underground roots enlarging into storage tubers while vines continue growing but more slowly

Reduce watering frequency as tubers develop. Hill soil around vines if tubers begin emerging. Watch for cracks in soil indicating tubers are enlarging.

Harvest

1-2 weeks

Tubers reaching mature size (4-12 inches long depending on variety) with skin beginning to set and cure

Harvest before first frost. Dig carefully to avoid bruising tubers. Allow to cure at 80-85°F and 90% humidity for 10-14 days before storage.

Companion Planting

Plan your garden →

Plant with:

Beans Corn Squash Cabbage Lettuce Thyme Parsnips

Avoid planting near:

Brassicas (in some cases due to competing nutrients) Fennel Potatoes (common pests and diseases)

Common Pests

Wrap base of plants with aluminum foil; use pheromone traps; remove affected vines immediately; plant resistant varieties
Use row covers early in season; spray neem oil or insecticidal soap; encourage beneficial insects; avoid excessive nitrogen fertilizer
Use row covers at planting; apply diatomaceous earth; spray neem oil; plant resistant varieties
Avoid waterlogging; ensure good drainage; cure harvested tubers properly; store at 55-60°F and low humidity; remove infected tubers
Use disease-free seed stock; practice crop rotation; cure tubers at higher temperature (80-85°F); avoid mechanical injury during harvest

Uses

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Baked, Roasted & Fried

Culinary

Sweet potatoes are versatile in cooking—baked whole, roasted as fries, mashed, or added to curries and stir-fries. Their natural sweetness makes them popular in both savory and sweet dishes. [source]

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Nutritional Superfood

Culinary

Rich in beta-carotene, vitamin C, potassium, and fiber. Orange varieties provide substantial provitamin A content supporting eye health and immune function. [source]

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Traditional & Folk Medicine

Medicinal

Used in traditional Asian medicine for blood sugar regulation and digestive health. Modern research suggests potential benefits for inflammation and antioxidant support. [source]

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Livestock & Animal Feed

Household

Sweet potato vines and roots serve as nutritious forage for livestock, including chickens and goats, providing cost-effective supplemental feed. [source]

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Natural Dye Production

Craft

Purple and red varieties yield natural pigments used in textile dyeing and food coloring, offering sustainable alternatives to synthetic dyes. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Harvest 90-150 days after planting, before the first fall frost when soil temperature drops below 60°F. Carefully dig around plants to avoid bruising tubers. For best storage quality, cure harvested sweet potatoes at 80-85°F and 90% humidity for 10-14 days, which heals minor cuts and hardens the skin. Store at 55-60°F in a dark, well-ventilated location; avoid cold temperatures below 50°F which cause chilling injury.

Fun Facts

🌱 Sweet potatoes are not potatoes at all—they belong to the morning glory family (Convolvulaceae), while common potatoes are nightshades (Solanaceae). The name confusion arose from early European traders.
🌱 The purple varieties contain anthocyanins, the same antioxidant compounds found in blueberries, grapes, and red wine, making them a functional food with significant health benefits.
🌱 Sweet potatoes have been cultivated for over 5,000 years and originated in Central and South America. They spread globally after Columbus's voyages and are now a staple crop in Asia, Africa, and the Caribbean.

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