In USDA zone 3, the last spring frost usually falls between May 5 and May 31. Sow or plant collards around Apr 16 to Jun 10. Expect to harvest around Jul 4 to Oct 31.
| Sow or plant outside | Apr 16 to Jun 10 |
|---|---|
| Harvest | Jul 4 to Oct 31 |
| 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 collards in your exact town, not just your zone.
Get my dates free →Tough, forgiving greens that take heat and cold. Read the full collards growing guide: spacing, sun and soil, step-by-step care, problems and the best varieties.