How to Grow Inca Glow
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Inca Glow
Solanum tuberosum 'Inca Glow'
vegetableInca Glow is a mid-season potato variety with striking dark purple/blue skin and creamy yellow flesh, originally developed in Peru. Known for its nutritional richness due to high anthocyanin content and excellent flavor, it produces medium-sized round tubers. This variety is becoming increasingly popular among home gardeners and specialty food producers seeking colorful, nutrient-dense potatoes.
When should you plant Inca Glow in your zone?
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Example Inca Glow timeline · Pittsburgh, PA (Zone 6b)
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Plant Inca Glow
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 Inca Glow
Around Jun 26≈ 70 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Inca Glow dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-8; prefers cooler climates with adequate moisture
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Seed Potato Preparation
1-2 weeksSeed potatoes are cut into 1.5-2 oz pieces, each containing at least one eye, allowed to cure and develop a protective suberized layer
Cut potatoes 1-2 weeks before planting; allow cut pieces to dry in a cool, dark location to prevent rot and disease entry
Sprouting & Emergence
2-3 weeksSeed potato pieces develop shoots underground; plants emerge with initial true leaves 2-3 weeks after planting
Ensure soil is 45°F or warmer for planting. Keep soil consistently moist but not waterlogged. Remove any diseased or rotting seed pieces.
Vegetative Growth
3-4 weeksPlants develop leafy foliage and underground stolons that will form tubers. Plants reach 12-24 inches in height with dense green foliage
Hill soil around plants when 6-8 inches tall to protect developing tubers from light exposure (which causes greening). Monitor for pests and diseases. Maintain consistent watering.
Tuber Development
4-6 weeksStolons thicken into developing tubers; the characteristic dark purple skin begins to show; flowers may appear (small white or purple flowers)
This is the critical growth period—maintain steady moisture and consistent soil temperature. Continue hilling if needed. Avoid nitrogen-heavy fertilizers; phosphorus and potassium support tuber development.
Maturation & Harvest Ready
2-3 weeksTubers reach full size with well-developed skin; foliage yellows and begins to die back naturally. Tubers feel firm and skin is thick
Allow foliage to die back naturally if possible—this allows the skin to cure and thicken. Stop watering 1-2 weeks before harvest to reduce disease risk during harvest.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Hand-pick adults and egg clusters; use row covers on young plants; apply neem oil or spinosad if severe; consider Bacillus thuringiensis for larvae
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Use row covers until flowering; reflective mulches; insecticidal soap; neem oil spray; maintain plant vigor through proper watering
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Strong water spray to dislodge; insecticidal soap; neem oil; encourage beneficial insects like ladybugs
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Use milky spore or beneficial nematodes; remove infested tubers during harvest; crop rotation (avoid planting potatoes in same bed for 3+ years)
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Ensure good air circulation; avoid overhead watering; remove affected leaves immediately; copper fungicide or chlorothalonil spray; destroy infected plants
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Remove lower leaves as plants mature; improve air circulation; mulch to prevent soil splash; copper-based fungicide; proper spacing
Uses
Nutritious Colorful Cooking
CulinaryInca Glow potatoes retain their striking purple color when cooked, making them visually stunning in mashed potatoes, roasted potato dishes, and potato salads. The creamy texture and slightly nutty flavor make them ideal for both simple preparations and gourmet recipes. [source]
Antioxidant-Rich Nutrition
MedicinalHigh in anthocyanins and other polyphenols, Inca Glow potatoes provide antioxidant and potential anti-inflammatory benefits. These bioactive compounds may support cardiovascular health and reduce oxidative stress. [source]
Specialty Market & Fine Dining
CulinaryThe unique purple coloring and heritage origin make Inca Glow potatoes popular in farmers markets, specialty grocery stores, and upscale restaurants seeking unique, locally-grown ingredients. [source]
Home Garden Heirloom Cultivation
HouseholdGrowing Inca Glow supports seed saving and preservation of traditional Andean potato genetics, connecting home gardeners to agricultural heritage and biodiversity conservation. [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 when foliage dies back (typically 70-90 days after planting) or when tubers reach desired size. For fresh eating, harvest earlier; for storage, wait for full maturity and skin hardening. Carefully dig with a fork, working from the side to avoid puncturing tubers. Handle harvested potatoes gently and allow to cure in a cool (50-55°F), dark, well-ventilated area for 1-2 weeks before storage. Store in darkness at 45-50°F with 85-90% humidity for 5-7 months.
Fun Facts
- 🌱 Inca Glow is one of over 4,000 potato varieties developed and cultivated by Andean civilizations over thousands of years; it represents the incredible biodiversity of Peruvian potato agriculture.
- 🌱 The deep purple color comes from anthocyanins—the same beneficial compounds found in blueberries and red wine—making Inca Glow one of the most nutrient-dense potato varieties available.
- 🌱 Unlike many colored potatoes that fade when cooked, Inca Glow maintains much of its striking purple hue through cooking, making it a visually dramatic addition to any plate.
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