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How to Grow Superior Potato

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Superior Potato

Solanum tuberosum 'Superior'

vegetable

Superior is a mid-season potato variety known for its excellent all-purpose qualities, smooth tan skin, and white flesh. It produces high yields of medium-sized, uniform tubers that store exceptionally well and have good culinary versatility. This reliable variety is widely grown commercially and by home gardeners due to its disease resistance and consistent performance.

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Example Superior Potato timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Superior Potato

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Superior Potato

    Around Jul 11

    ≈ 85 days after planting

Sample dates for Pittsburgh, PA. Sign up to get exact Superior Potato dates for your own zip code.

Growing Conditions

☀️
Sun: Full sun, 6-8 hours daily minimum; 8+ hours preferred for maximum yields
💧
Water: Consistent moisture throughout growing season, about 1-1.5 inches per week. Keep soil evenly moist but not waterlogged. Reduce watering after plants die back to prevent rot.
📏
Spacing: 10 inches
📅
Days to maturity: 85-100 days
🌱
Planting depth: 4 inches; plant seed pieces 2 inches below soil surface, then hill as plants grow

Soil

Type: Well-draining, loose, slightly acidic loamy soil with good organic matter
pH: 5.0-7.0
Amendments:
Compost or aged manure Peat moss Perlite or sand for drainage Sulfur if pH is too high

Growing Zones

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Thrives in zones 3-8, with best results in cooler climates (zones 4-6)

2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a

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Growth Stages

1

Seed Piece Preparation & Planting

1-2 weeks before sprouting

Seed potatoes are cut into 1.5-2 ounce pieces with at least 2 eyes each. Pieces are allowed to cure for 1-2 days before planting directly into prepared soil.

Use certified seed potatoes to prevent disease. Ensure soil temperature is at least 45°F (better at 50°F+). Keep seed bed consistently moist after planting.

2

Emergence & Early Growth

3-4 weeks

Sprouts emerge from soil 2-3 weeks after planting. Plants develop their first leaves and begin vegetative growth. Hilling (mounding soil) begins.

Hill soil around emerging plants every 2-3 weeks to cover developing tubers and prevent greening. Keep well-watered. Watch for early blight and Colorado potato beetles.

3

Vegetative & Flowering

4-6 weeks

Plants grow robust foliage with multiple stems reaching 18-24 inches tall. White or pale pink flowers appear on flower stems. Underground tuber initiation and bulking occurs.

Continue hilling to maximize soil coverage and tuber production. Maintain consistent moisture. Fertilize mid-season with balanced fertilizer. Monitor for pests and fungal diseases like late blight.

4

Tuber Bulking & Maturation

4-6 weeks

Flowers fade, foliage remains healthy and green. Underground, tubers rapidly increase in size and starch content. Plant energy focuses on underground storage organs.

Maintain even moisture—critical for final size and quality. Continue pest/disease monitoring. Do not over-fertilize nitrogen, which promotes foliage at tuber expense. Avoid wounding plants.

5

Maturity & Harvest Readiness

2-3 weeks before full vine death

Foliage begins yellowing and dying back naturally. Skin hardens and thickens (skin-set), protecting against bruising. Plant is ready for harvest when vines are dead or nearly dead.

Stop watering 2-3 weeks before harvest to allow skin hardening and reduce rot risk. Harvest on a dry day. Handle tubers gently to avoid bruising, which promotes rot in storage.

Companion Planting

Plan your garden →

Plant with:

Basil Borage Garlic Marigold Nasturtium Onion Thyme

Avoid planting near:

Tomato Eggplant Pepper Fennel Brassicas (cabbage, broccoli) Apple trees

Common Pests

  • Hand-pick adults and yellow egg clusters. Use row covers on young plants. Apply neem oil or spinosad. Rotate crops yearly. Encourage natural predators like ladybugs.

  • Spray with strong water stream to dislodge. Use insecticidal soap or neem oil. Plant repellent companions like nasturtium. Monitor leaf undersides regularly.

  • Use row covers early season. Apply neem oil or insecticidal soap. Remove affected leaves. Yellow sticky traps to monitor populations.

  • Ensure good air circulation and avoid overhead watering. Remove infected foliage promptly. Apply copper fungicide or fixed sulfur at first sign. Use resistant varieties; Superior has moderate resistance.

  • Remove lower leaves as preventive. Avoid overhead irrigation. Apply copper or sulfur fungicide. Mulch to prevent soil splash. Improve air circulation.

  • Crop rotation (3-4 year cycle). Apply beneficial nematodes to soil before planting. Trap crops like wheat. Avoid planting in recently sod-converted land.

Uses

🍳

Boiling & Mashing

Culinary

Superior's white flesh and moderate starch content make it ideal for boiling, mashing, and potato salads. It holds its shape well during cooking and absorbs flavors readily. [source]

🍳

Baking & Frying

Culinary

An excellent all-purpose potato suitable for baking, frying, and hash browns. The smooth skin and uniform size make it attractive for presentation. [source]

🏠

Storage & Preservation

Household

Superior potatoes have exceptional storage life, keeping 4-6 months in cool, dark, humid conditions (50°F, 90-95% humidity). Their thick skin resists sprouting and rot. [source]

💊

Nutritional Value

Medicinal

Potatoes are excellent sources of vitamin C, potassium, manganese, and B vitamins. When prepared simply, they provide sustained energy from complex carbohydrates. [source]

🦋

Soil Building & Biodiversity

Wildlife

Potato fields provide habitat and food sources for beneficial insects, soil organisms, and pollinators. The flowering stage supports bees and other pollinators. [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 Superior potatoes 85-100 days after planting when vines have died back. Use a garden fork to gently dig 12 inches away from plant base to avoid piercing tubers. Harvest in cool, dry conditions. Let tubers air-dry for 1-2 hours before storing. For new potatoes, harvest 60-70 days when plants are still flowering and tubers are small.

Fun Facts

  • 🌱 Superior was developed at the USDA and is one of the most widely grown potato varieties in North America, preferred by commercial processors and home gardeners alike.
  • 🌱 Potatoes are the world's fourth-largest food crop, after rice, wheat, and corn, and were a revolutionary crop that helped support the Industrial Revolution.
  • 🌱 Potato plants contain alkaloids like solanine as a natural pest defense; the concentration increases with light exposure, which is why potatoes should be stored in the dark.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Full Sun
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