How to Grow Algiers Onion
Algiers Onion
Allium cepa var. cepa
vegetableAlgiers is a long-day storage onion variety known for its golden-brown papery skin and excellent keeping quality. It produces medium to large, globe-shaped bulbs with firm, pungent white flesh ideal for storage and cooking. This heirloom variety is prized for its reliability and ability to store for several months.
When should you plant Algiers Onion in your zone?
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Example Algiers Onion timeline · Pittsburgh, PA (Zone 6b)
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Plant Algiers Onion
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 Algiers Onion
Around Jul 26≈ 100 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Algiers Onion dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-9, particularly suited to northern and cooler regions
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Seedling/Sprouting
2-3 weeksShoots emerge 7-10 days after planting; thin, grass-like green foliage
Ensure consistent soil moisture; provide full sun; thin seedlings to proper spacing if direct seeded
Vegetative Growth
6-8 weeksMultiple green shoots develop; root system establishes; foliage grows upright
Maintain regular watering and full sun exposure; apply balanced fertilizer every 3-4 weeks; remove weeds regularly
Bulbing
4-6 weeksBase of plant swells as bulb forms; foliage remains green but growth slows; visible bulb development underground
Reduce nitrogen fertilizer; continue consistent watering until foliage yellows; long days (14+ hours) trigger bulbing in this variety
Maturation
2-3 weeksFoliage yellows and flops over; papery brown skin forms; growth stops
Reduce watering once tops fall; do not water the foliage; bulbs continue curing in place
Harvest & Curing
Harvest over 1-2 weeks; curing 2-4 weeksBulbs fully mature with dry, papery brown exterior; necks tighten
Pull or dig bulbs gently; cure in warm, dry, well-ventilated location for 2-4 weeks before storage
Common Pests
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Row covers; crop rotation; remove infested plants; beneficial nematodes; spinosad sprays
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Strong water spray; insecticidal soap; neem oil; reflective mulch
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Plant certified disease-free sets; improve drainage; avoid overwatering; crop rotation (3+ years)
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Improve air circulation; avoid overhead watering; fungicide (copper sulfate); resistant varieties
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Row covers; crop rotation; remove affected bulbs; cultural practices
Uses
Cooking & Storage
CulinaryExcellent for French onion soup, caramelizing, roasting, and general cooking applications. The firm flesh holds well during extended cooking, making it ideal for soups, stews, and sauces. [source]
Long-Term Preservation
CulinaryDue to excellent keeping quality, suitable for drying, pickling, and storing without refrigeration. A storage staple for gardeners seeking food security. [source]
Immune Support
MedicinalOnions contain quercetin and sulfur compounds with potential anti-inflammatory and antioxidant properties. Traditionally used in folk medicine for respiratory health. [source]
Natural Pest Deterrent
HouseholdOnion sprays and extracts used as organic pest and disease deterrent in gardens. Strong sulfur compounds may repel certain insects. [source]
Dye Production
CraftOuter papery skins (called onion skins) produce natural golden-yellow and orange dyes used in textile and fiber arts. [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 50-75% of foliage has yellowed and fallen over (late July-August in northern regions). Pull bulbs carefully on a dry day and cure in a warm (70-80°F), dry, well-ventilated space (garage, barn, shed) for 2-4 weeks until necks are completely dry and papery. Store in cool (32-40°F), dry conditions with good air circulation; proper storage allows keeping for 4-6 months.
Fun Facts
- 🌱 Algiers is a classic heirloom variety that has been grown for generations; it's a true long-day onion that requires 14+ hours of daylight to initiate bulbing, making it ideal for northern latitudes.
- 🌱 The papery golden-brown skin develops naturally during the curing process and provides exceptional storage longevity—properly cured Algiers onions can last 5-6 months in cool storage.
- 🌱 Onions have been cultivated for over 5,000 years and were a valued crop in ancient Egypt; the Algiers variety's name refers to its likely North African origin region.
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