How to Grow Ostbo Red
Wikimedia Commons
Ostbo Red
Solanum tuberosum 'Ostbo Red'
vegetableOstbo Red is a mid-season red potato variety developed in Norway, prized for its deep red skin and yellow flesh. It produces medium to large oval tubers with excellent flavor and creamy texture. This versatile potato is ideal for boiling, mashing, and salads.
When should you plant Ostbo Red in your zone?
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Example Ostbo Red timeline · Pittsburgh, PA (Zone 6b)
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Plant Ostbo Red
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 Ostbo Red
Around Jul 16≈ 90 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Ostbo Red dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-7; can tolerate cooler climates better than many red varieties
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Seed Potato Dormancy Break & Sprouting
2-4 weeks pre-plantingSeed potatoes begin sprouting white or pink eyes/sprouts before planting
Chit (pre-sprout) seed potatoes 2-4 weeks before planting in cool, bright conditions to encourage strong sprouts. Cut large seed potatoes into pieces 1.5-2 oz with 2-3 eyes per piece.
Emergence & Early Growth
3-4 weeksSprouts emerge from soil as small leafy shoots, developing first true leaves
Provide consistent moisture and begin hilling soil around stems when plants are 6-8 inches tall. Hill every 2-3 weeks to promote tuber formation and prevent greening.
Vegetative Growth
4-6 weeksPlant develops robust foliage with compound leaves; underground stolons form and begin tuber initiation
Maintain steady watering. Apply balanced fertilizer or side-dress with compost. Continue hilling. Watch for pests and disease.
Tuber Bulking & Flowering
4-6 weeksTubers enlarge rapidly; plant may produce white or pink flowers; foliage remains dark green
Maintain consistent moisture; critical period for tuber development. Avoid nitrogen excess which favors foliage over tubers. Mulch to retain soil moisture and keep tubers covered.
Maturity & Senescence
2-3 weeksFoliage yellows and dies back; tubers reach full size; skin sets and hardens
Reduce watering as foliage fades. Do not harvest until foliage is completely dead to allow skin to set. Green potatoes are toxic.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Hand-pick adults and egg clusters early; use row covers on young plants; apply spinosad or neem oil; resistant varieties help
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Use reflective mulches; row covers; insecticidal soap; encourage natural predators like parasitic wasps
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Rotate crops; avoid planting in recently sod areas; trap crops of sunflower or barley; beneficial nematodes
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Remove lower infected leaves; improve air circulation; mulch to prevent soil splash; apply copper fungicide or chlorothalonil; resistant varieties
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Avoid overhead watering; remove infected foliage; apply copper or mancozeb fungicides; proper spacing; avoid overwatering
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Use certified disease-free seed; maintain pH below 6.5; consistent moisture; crop rotation 3+ years
Uses
Boiling & Mashing
CulinaryOstbo Red's creamy yellow flesh and firm texture make it ideal for boiling whole or cut, and perfect for smooth, luxurious mashed potatoes. The red skin can be left on for visual appeal and added nutrition. [source]
Salads & Side Dishes
CulinaryThe attractive red skin and firm texture hold their shape well when cooked, making them excellent for potato salads, gratins, and roasted vegetable dishes. [source]
Soups & Stews
CulinaryThe dense flesh and good flavor are ideal for hearty soups and stews where potatoes need to maintain structure throughout cooking. [source]
Carbohydrate & Potassium Source
NutritionalRed potatoes provide beneficial complex carbohydrates, potassium, vitamin B6, and vitamin C. The skin contains additional fiber and antioxidants. [source]
Long-term Storage
HouseholdOstbo Red's excellent storage capability—up to 4-5 months in proper cool, humid conditions—makes it a reliable choice for season-long home storage and winter eating. [source]
Harvest Tips
Harvest when foliage has completely died back (approximately 90-110 days after planting). Dig carefully with a fork to avoid bruising tubers. Choose dry weather for digging. Small new potatoes can be harvested earlier by gently uncovering soil around plant base without uprooting. Cure harvested potatoes at 50-60°F with high humidity for 1-2 weeks to harden skin. Store in cool (45-50°F), humid, dark conditions for up to 4-5 months.
Fun Facts
- 🌱 Ostbo Red was developed in Norway, a country with a long tradition of potato cultivation and breeding adapted to cool, short growing seasons.
- 🌱 Red potatoes have higher levels of lycopene and other antioxidants in their skin than white or yellow varieties, particularly when skin is eaten.
- 🌱 Unlike white potatoes, red-skinned varieties typically contain less solanine (a natural toxin) in the skin, making them safer to eat with skin on when cooked properly.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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