Copra Onion
Copra Onion: 104-110 days to harvest, 7-14 days to germinate, 4-6 inches between plants, pH 6.2-6.8, hardy in zones 5-10. Fruit runs to about 3-4 inches diameter. Give it full sun (6+ hours) and 1 inch per week, reduce before harvest water. It will crop in a container. Because this is a hybrid, seed saved from it will not repeat the parent — plan on fresh seed each year.
Sowing
Start seeds indoors 10-12 weeks before last frost or direct sow in early spring. Plant sets in early spring.
Cultivation
- Sun
- Full sun (6+ hours)
- Water
- 1 inch per week, reduce before harvest
- Soil
- Well-drained, fertile soil with good organic content
- Soil pH
- 6.2-6.8
- Spacing
- 4-6 inches
- Height
- 12-18 inches
- Season
- Cool season
Appearance & flavour
- Colour
- Golden brown skin with white flesh
- Size
- 3-4 inches diameter
- Shape
- Globe-shaped with excellent density
- Flavour
- Sharp, pungent flavor that mellows when cooked
In the kitchen
Excellent for cooking, soups, stews, and general kitchen use. Outstanding storage variety.
Pests, disease & resistance
- Pests
- Onion thrips, onion maggots, wireworms
- Diseases
- Downy mildew, purple blotch, bacterial soft rot
- Resistance
- Good resistance to pink root and fusarium basal rot
Planting calendar by USDA zone
| Zone | Start indoors | Transplant | Direct sow | Harvest |
|---|---|---|---|---|
| 1 | — | — | June – July | September |
| 2 | — | — | May – July | September |
| 3 | — | — | May – June | August – October |
| 4 | — | — | April – June | August – October |
| 5 | — | — | April – May | July – November |
| 6 | — | — | April – May | July – November |
| 7 | — | — | March – May | July – November |
| 8 | — | — | March – April | June – December |
| 9 | — | — | February – March | May – December |
| 10 | — | — | January – March | May – December |
| 11 | — | — | January – February | April – December |
| 12 | — | — | January – February | April – December |
| 13 | — | — | January – February | April – December |
Companion planting
8 beneficial pairings indexed for this variety, 3 to avoid.
Avoid
Nutrition (per 100 g)
- Calories (per 100 g)
- 40
- Protein (g)
- 1.1
- Fat (g)
- 0.1
- Carbohydrate (g)
- 9.34
- Fibre (g)
- 1.7
- Sugars (g)
- 4.24
- Vitamin A (µg)
- 0
- Vitamin C (mg)
- 7.4
- Vitamin E (mg)
- 0.02
- Vitamin K (µg)
- 0.4
- Vitamin B6 (mg)
- 0.12
- Folate (µg)
- 19
- Calcium (mg)
- 23
- Iron (mg)
- 0.21
- Magnesium (mg)
- 10
- Phosphorus (mg)
- 29
- Potassium (mg)
- 146
- Zinc (mg)
- 0.17
- Selenium (µg)
- 0.5
Where to buy seed and equipment
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Cultivar facts compiled from public horticultural references including USDA GRIN and NC State Extension. Descriptions are original to this catalogue.
Grown Copra Onion?
Post a crop report — day counts, reservoir readings, what worked. Variety-specific logs are the most useful thing on the forum.
Similar varieties
Other alliums with a comparable time to harvest, so a season that suits Copra Onion suits these too.
- Comanche 105 days
- Candy Onion 100 days
- Red Burgundy Onion 100 days
- Rossa di Milano 100 days
- Yellow Sweet Spanish Onion 110 days
- Red Wing Storage Onion 110 days