When to plant sweet potatoes in zone 4
In USDA zone 4, the last spring frost usually falls between May 1 and May 20. Sow or plant sweet potatoes around Jun 9 to Jul 3. Zone 4's season is tight for sweet potatoes: pick the fastest varieties, start early under cover, or grow them in a greenhouse.
Zone 4 dates for sweet potatoes
| Sow or plant outside | Jun 9 to Jul 3 |
|---|---|
| Harvest | Tight: the season is short for sweet potatoes here |
| Typical last spring frost | May 1 to May 20 |
| 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 sweet potatoes in your exact town, not just your zone.
Get my dates free →How to grow sweet potatoes
Heat-loving roots that store for months. Read the full sweet potatoes growing guide: spacing, sun and soil, step-by-step care, problems and the best varieties.