When to plant broccoli in zone 3
In USDA zone 3, the last spring frost usually falls between May 5 and May 31. Start broccoli indoors around Mar 17 to Apr 22. Plant them out around May 10 to Jun 10. Expect to harvest around Jun 28 to Aug 13.
Zone 3 dates for broccoli
| Start seeds indoors | Mar 17 to Apr 22 |
|---|---|
| Plant outside | May 10 to Jun 10 |
| Harvest | Jun 28 to Aug 13 |
| Typical last spring frost | May 5 to May 31 |
| Typical first fall frost | around Sep 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 broccoli in your exact town, not just your zone.
Get my dates free →How to grow broccoli
A cool-season classic with a big main head. Read the full broccoli growing guide: spacing, sun and soil, step-by-step care, problems and the best varieties.