When to plant onions in zone 8
In USDA zone 8, the last spring frost usually falls between Feb 25 and Mar 25. Start onions indoors around Jan 1 to Jan 20. Plant them out around Mar 3 to Mar 28. Expect to harvest around Jul 3 to Aug 9.
Zone 8 dates for onions
| Start seeds indoors | Jan 1 to Jan 20 |
|---|---|
| Plant outside | Mar 3 to Mar 28 |
| Harvest | Jul 3 to Aug 9 |
| Typical last spring frost | Feb 25 to Mar 25 |
| Typical first fall frost | around Nov 15 |
USDA zones measure winter cold, not frost dates, so these are typical dates for the zone. Towns in the same zone can be weeks apart.
Get dates for onions in your exact town, not just your zone.
Get my dates free →How to grow onions
Plant once, season everything all year. Read the full onions growing guide: spacing, sun and soil, step-by-step care, problems and the best varieties.