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Copra Onion

Allium

Allium cepa 'Copra'

Overview
The gold standard for long-storage onions, Copra delivers outstanding keeping quality with bulbs storing 8-12 months when properly cured. This reliable variety produces uniform, dense bulbs with excellent flavor that intensifies during storage. A must-have for gardeners seeking year-round onion self-sufficiency.
Planting
Start seeds indoors 10-12 weeks before last frost or direct sow in early spring. Plant sets in early spring.
Growing
Sun: full. Soil pH: 6.2–6.8. Space plants 4" apart. Germination: 7-14.
Pests & diseases
Common pests: Onion thrips, onion maggots, wireworms. Common diseases: Downy mildew, purple blotch, bacterial soft rot.