How to Grow White Bermuda Onion
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White Bermuda Onion
Allium cepa
vegetableWhite Bermuda is a sweet, mild onion variety known for its pale golden-white skin and tender, juicy flesh. This heirloom variety is prized for fresh eating, salads, and mild onion dishes due to its low sulfur content and delicate flavor.
When should you plant White Bermuda Onion in your zone?
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Example White Bermuda Onion timeline · Pittsburgh, PA (Zone 6b)
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Plant White Bermuda 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 White Bermuda Onion
Around Aug 5≈ 110 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact White Bermuda Onion dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-10; performs best in zones 5-9
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Get my White Bermuda Onion timeline →Growth Stages
Sprouting
1-2 weeksSets germinate or seeds emerge with first leaves visible above soil. Green shoots appear within 7-10 days.
Keep soil consistently moist. Ensure adequate sunlight exposure. Thin seedlings to proper spacing as they develop.
Vegetative Growth
6-8 weeksMultiple green leaves develop, forming the leafy top. Plant builds root system and begins accumulating nutrients for bulbing.
Maintain consistent watering and full sun. Apply balanced fertilizer every 3-4 weeks. Keep weed-free to reduce competition.
Bulb Formation
4-6 weeksBulge develops at the base as the plant responds to day length. White skin begins to form; the characteristic pale color emerges.
Reduce nitrogen fertilizer; increase phosphorus and potassium for bulb development. Maintain even moisture but begin reducing frequency as bulbing progresses.
Maturation
3-4 weeksBulbs swell to full size with papery white outer layers. Tops begin to yellow, wilt, and fall over naturally.
Reduce watering significantly. Do not harvest prematurely. Allow tops to dry down naturally for better storage.
Harvest & Curing
Harvest window: 2-3 days; curing: 2-3 weeksBulbs reach full maturity with dried, papery skin. Tops completely brown and dry.
Pull bulbs when tops fall over. Allow to cure in a warm, dry location for 2-3 weeks before storage. Brush off soil gently; do not wash.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Use row covers in early season. Crop rotation (3-year cycle). Remove and destroy infested bulbs. Spinosad spray if needed.
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Spray with neem oil or insecticidal soap. Remove infected plant debris. Encourage natural predators like lady beetles.
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Improve air circulation. Spray with sulfur or baking soda solution. Avoid overhead watering.
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Use disease-resistant sets. Practice crop rotation. Ensure proper drainage and avoid waterlogging.
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Use resistant varieties when possible. Reduce humidity with proper spacing. Copper fungicide spray in humid conditions.
Uses
Fresh eating and salads
CulinaryWhite Bermuda's mild, sweet flavor and tender texture make it ideal for fresh eating, sandwiches, salads, and salsas. Its low sulfur content provides a delicate onion taste without harshness. [source]
Grilling and roasting
CulinarySlice thickly and grill or roast to bring out the natural sweetness. The mild flavor complements grilled vegetables and proteins without overpowering. [source]
Traditional wellness
MedicinalOnions contain quercetin and other flavonoids with antioxidant properties. Used traditionally in folk medicine to support immune health and respiratory function. [source]
Natural dye production
HouseholdThe papery outer skins can be used to create natural yellow and golden dyes for textiles, a traditional practice in various cultures. [source]
Pickled preservation
CulinaryWhite Bermuda onions are excellent for pickling whole or sliced, producing a mild, slightly sweet pickled condiment that pairs with many dishes. [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 the tops have fallen over and turned brown, typically mid-summer. Pull bulbs gently and allow to cure in a warm (70-75°F), dry, well-ventilated location for 2-3 weeks. Once cured, trim roots to 1 inch and store in cool (35-40°F), humid conditions. White Bermudas are best used fresh within a few months and do not store as long as storage onion varieties.
Fun Facts
- 🌱 White Bermuda onions are named after Bermuda, where they were historically grown and exported, becoming renowned for their exceptional sweetness and mild flavor in the 19th century.
- 🌱 These onions contain lower levels of sulfur compounds compared to storage onion varieties, which is why they taste sweeter and don't cause the same eye irritation when cut.
- 🌱 White Bermuda is a short-day onion variety, meaning it requires fewer hours of daylight to trigger bulbing, making it ideal for southern regions with shorter growing seasons.
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