How to Grow Copra Onion
Allium cepa 'Copra'
Your complete guide to growing Copra Onion.
📷 Wikipedia: OnionWhen to Plant Copra Onion
Planting windows vary by USDA hardiness zone. Look up yours by ZIP code.
| Zone | Start Indoors | Direct Sow | Harvest |
|---|---|---|---|
| Zone 1 | — | June – July | September |
| Zone 2 | — | May – July | September |
| Zone 3 | — | May – June | August – October |
| Zone 4 | — | April – June | August – October |
| Zone 5 | — | April – May | July – November |
| Zone 6 | — | April – May | July – November |
| Zone 7 | — | March – May | July – November |
| Zone 8 | — | March – April | June – December |
| Zone 9 | — | February – March | May – December |
| Zone 10 | — | January – March | May – December |
| Zone 11 | — | January – February | April – December |
| Zone 12 | — | January – February | April – December |
| Zone 13 | — | January – February | April – December |
Companion Plants for Copra Onion
✓ Good companions
Onions repel cabbage worms, flea beetles, and other brassica pests
Onions repel carrot flies while carrots help break up soil for onion bulb development
Onions provide pest protection and don't compete for nutrients due to different root depths
Both plants repel nematodes and various garden pests when grown together
Attracts beneficial insects and doesn't compete with onions for nutrients
Onions deter aphids and other soft-bodied insects that damage pepper plants
Onions repel slugs and other pests while not competing for growing space
Onions deter aphids and hornworms from tomatoes while improving their flavor
✗ Keep away from
Onions can inhibit asparagus growth and reduce spear production
Onions can inhibit bean growth and nitrogen fixation
Onions stunt pea growth and interfere with their nitrogen-fixing ability
Nutrition Facts
Per 100g serving (USDA FoodData Central)
