How to Grow English Blue
Wikimedia Commons
English Blue
Solanum tuberosum 'English Blue'
vegetableEnglish Blue is a distinctive potato variety with deep purple-blue skin and flesh throughout, prized for its striking appearance and nutty, slightly sweet flavor. It's a medium-maturing heritage variety that produces oval to round tubers with excellent culinary qualities. This potato variety is gaining popularity among home gardeners and specialty chefs for its unique color and robust flavor profile.
When should you plant English Blue in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example English Blue timeline · Pittsburgh, PA (Zone 6b)
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Plant English Blue
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 English Blue
Around Jul 6≈ 80 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact English Blue dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-8; prefers cooler climates with consistent moisture
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Seed Piece Sprouting
2-4 weeks pre-plantingSeed potato pieces develop eyes and sprouts in cool, dark storage before planting
Store seed potatoes at 45-50°F with high humidity for 2-4 weeks before planting to promote sprouting. Cut large seed pieces into 2-ounce chunks, each with at least 2 eyes
Seedling & Early Growth
3-4 weeksSprouts emerge from soil and develop first true leaves; plant height reaches 6-8 inches
Emerge within 2-3 weeks if soil temperature is 45°F or warmer. Begin regular watering as shoots appear. Mound soil around stems as they grow (hilling) to prevent greening and expose developing tubers to light
Vegetative Growth
4-6 weeksVigorous leafy growth, dense foliage with compound leaves; plant reaches 12-18 inches tall
Hill soil every 2-3 weeks to encourage tuber development and prevent light exposure. Maintain consistent moisture and apply balanced fertilizer mid-season. Monitor for pests and early blight
Flowering & Tuber Bulking
3-4 weeksSmall purple-tinged flowers appear; tubers actively enlarge underground. Foliage remains green and robust
Continue hilling and consistent watering—this is critical for tuber sizing. Reduce nitrogen to favor tuber development over foliage. Maintain pest management and disease prevention
Maturity & Harvest
1-2 weeksFoliage yellows and dies back as tubers reach full size; skin sets and hardens
Stop watering 1-2 weeks before harvest to toughen skins. Foliage naturally senesces; no need to cut it down early. Harvest when soil is dry to avoid bruising
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Hand-pick beetles and egg clusters; use row covers on young plants; apply spinosad or neem oil if infestation is severe; plant nasturtiums as trap crop
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Spray with strong water stream; use insecticidal soap; introduce ladybugs or lacewings; neem oil for heavy infestations
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Use reflective mulch; apply neem oil or insecticidal soap; remove affected plants immediately; avoid over-fertilizing with nitrogen
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Rotate crops; soil moisture management (avoid overly wet soil); baiting with potato pieces; diatomaceous earth in soil
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and
Remove debris and mulch that provide shelter; beer traps; hand-pick at night; encourage natural predators like ground beetles
Uses
Gourmet Cooking & Specialty Dishes
CulinaryEnglish Blue's striking blue-purple color and firm texture make it ideal for roasting, boiling, mashing, and salads where visual impact enhances presentation. Its nutty, slightly sweet flavor adds depth to gratins, curries, and traditional British potato dishes. [source]
Chip & Fry Production
CulinaryMedium starch content makes English Blue suitable for both chips and fries, though it's more commonly reserved for specialty food products due to its premium appearance and flavor profile. [source]
Antioxidant-Rich Food
MedicinalThe deep purple-blue pigmentation indicates high levels of anthocyanins and other polyphenolic antioxidants, compounds studied for potential health benefits including anti-inflammatory and cardiovascular support. [source]
Natural Dye Production
HouseholdThe intense blue-purple pigments in English Blue potatoes can be extracted and used to create natural dyes for fabrics and craft projects, offering a sustainable alternative to synthetic colorants. [source]
Garden Pollinator Support
WildlifeThe small purple flowers of English Blue potato plants provide nectar for bees and other pollinators during mid-summer, supporting broader garden biodiversity while the crop grows. [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 80-100 days after planting, or when foliage has mostly yellowed and died back. Dig carefully to avoid skin bruising; cure harvested tubers in a cool (50-60°F), dark, humid location for 2 weeks to toughen skins and heal minor cuts. Store at 45-50°F in darkness in a breathable container; English Blue keeps 3-4 months under ideal conditions. For new potatoes, harvest 2-3 weeks earlier when tubers are still small and skins slip easily
Fun Facts
- 🌱 English Blue is a heritage potato variety with origins in Peru, where blue and purple potatoes have been cultivated for thousands of years by Indigenous peoples as staple crops
- 🌱 The deep purple-blue color comes from anthocyanins—the same powerful antioxidants found in blueberries and red wine—which remain stable even after cooking, making it visually striking in finished dishes
- 🌱 English Blue potatoes were popularized in Victorian-era British gardens and specialty cookery, and have seen a resurgence in popularity among contemporary chefs and home gardeners interested in heritage vegetable varieties and colorful food
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