How to Grow Jewel Sweet Potato
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Jewel Sweet Potato
Ipomoea batatas 'Jewel'
vegetableJewel is a popular orange-fleshed sweet potato cultivar known for its deep orange color, excellent flavor, and high beta-carotene content. It produces vigorous vines with heart-shaped leaves and develops large, oblong tubers underground. This variety is widely grown commercially and in home gardens for its nutritional value and culinary versatility.
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Example Jewel Sweet Potato timeline · Pittsburgh, PA (Zone 6b)
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Plant Jewel Sweet Potato
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Jewel Sweet Potato
Around Jul 26≈ 100 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Jewel Sweet Potato dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 8-10, can be grown in zone 7 with extended growing season
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Get my Jewel Sweet Potato timeline →Growth Stages
Sprouting & Slip Development
6-8 weeksSeed potatoes sprout in warm conditions (70-80°F). Slips (rooted sprouts) develop shoots and roots.
Start seed potatoes indoors 6-8 weeks before last frost. Keep soil warm and moist. Slips are ready to transplant when 6-8 inches tall with developed root systems.
Early Growth & Vine Establishment
3-4 weeksYoung slips are transplanted to the field. Heart-shaped leaves emerge and vines begin to spread along the ground.
Plant after soil temperature reaches 65°F (ideally 70°F+). Water regularly to establish roots. Apply mulch to regulate soil temperature and moisture. Remove competing weeds.
Vegetative & Vine Development
4-6 weeksVines grow vigorously, spreading 3-5 feet or more. Dense foliage covers the planting area. Underground, tubers begin forming at stolon bases.
Maintain consistent moisture (not waterlogged). Provide light organic matter top-dressing if needed. Monitor for pests. Avoid high-nitrogen fertilizer which promotes excessive vine growth over tuber production.
Tuber Development & Bulking
4-6 weeksTubers expand rapidly underground as the plant translocates sugars and starches. Vines continue to sprawl but growth slows. Orange coloration develops in tubers.
Reduce watering slightly; soil should be moist but not soggy. Avoid disturbing soil around plants. Pest management is critical at this stage. Vines may produce small, inconspicuous flowers (not essential for yield).
Maturity & Harvest Readiness
Until frost or 100-120 days from plantingTubers reach full size (typically 6-10 inches long). Skin hardens and color intensifies. Vines may yellow slightly as the plant matures.
Stop watering 2-3 weeks before harvest to harden skins. Harvest before first frost; sweet potatoes are frost-sensitive and will rot if exposed to cold. Dig carefully to avoid bruising tubers.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Use resistant varieties, crop rotation, remove affected plants immediately, avoid planting near old infested areas, use pheromone traps for monitoring
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Reflective mulches, insecticidal soap, neem oil, encourage beneficial insects like parasitic wasps
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Row covers on young plants, kaolin clay spray, neem oil, encourage predatory beetles
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Hand-pick caterpillars, Bacillus thuringiensis (Bt), encourage parasitic wasps
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Crop rotation, resistant varieties, soil solarization, remove infected plants
Uses
Roasted, baked, and fried preparations
CulinaryJewel sweet potatoes' orange flesh and sweet flavor make them ideal for roasting, baking, frying as chips, and puréeing for soups and side dishes. The rich beta-carotene content gives the distinctive orange color. [source]
Pie, desserts, and smoothies
CulinaryThe natural sweetness and creamy texture of Jewel sweet potatoes are perfect for pies, casseroles, desserts, and nutrient-dense smoothies. [source]
Nutritional and antioxidant support
MedicinalRich in beta-carotene (provitamin A), vitamins B and C, potassium, and fiber, Jewel sweet potatoes support immune function, vision health, and digestive wellness. [source]
Food preservation and storage
HouseholdProperly cured and stored sweet potatoes can last 3-6 months, making them an excellent long-term pantry staple for year-round nutrition. [source]
Wildlife habitat and foliage
WildlifeThe sprawling vines provide ground cover and shelter for beneficial insects and small creatures in the garden ecosystem. [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 100-120 days after planting or before the first frost. Carefully dig around the plant 12 inches away to avoid cutting tubers. Lift vines and gently unearth potatoes. Cure harvested sweet potatoes at 55-59°F with high humidity (85-90%) for 10-14 days to heal minor wounds and increase sweetness. Store in cool (55-59°F), dry conditions.
Fun Facts
- 🌱 The Jewel cultivar was developed at North Carolina State University and is one of the most commercially important orange-fleshed sweet potato varieties in the United States.
- 🌱 Sweet potatoes are not botanically related to regular potatoes; they are members of the morning glory family (Convolvulaceae), while potatoes belong to the nightshade family (Solanaceae).
- 🌱 A single Jewel sweet potato plant can produce 5-10 pounds of tubers under ideal growing conditions, making it an extremely productive home garden crop.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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