Bulb Onion
Allium cepa
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Quick Info
water
Regular, even watering; stop before harvest
spacing
10 cm between plants, 30 cm between rows
depth
1-2 cm deep (seeds) or base of bulb (transplants)
sun
Full sun
season
Dry season planting preferred, highlands year-round
frost
Tolerates light frost
height
30-50 cm
gemination
7-14 days
sprout to harvest
4-5 months from seed, 3-4 from transplant
soil ph
6.0-7.0
soil type
Well-drained, fertile loamy soil
fertilizer needs
Moderate nitrogen early, phosphorus and potassium throughout
About
Bulb onions are an essential cooking ingredient increasingly grown in PNG, particularly in the highland areas where cooler temperatures favour bulb development. Onions are a high-value crop with strong market demand and good storage potential compared to most PNG vegetables.
Health Benefits
Contains quercetin (powerful antioxidant), vitamin C, vitamin B6, folate, and potassium. Anti-inflammatory properties. Sulfur compounds support heart health.
Market Requirements
Bulbs should be firm, dry-skinned, and free of soft spots or sprouting. Cure properly before selling. Size uniformity improves market appeal.