When to plant sweet potatoes
The rule
Days to maturity: 90–120 days [src]
Method: Direct-sow in the garden. Frost tolerance: frost-tender (derived from the planting timing above).
Sweet Potatoes is frost-tender; it's grown as a spring/summer crop.
Sweet Potatoes planting dates by hardiness zone
| Zone | Start indoors | Direct-sow | Sow for fall |
|---|---|---|---|
| Zone 2a | — | May 21 – June 4 | — |
| Zone 2b | — | May 29 – June 12 | — |
| Zone 3b | — | May 24 – June 7 | — |
| Zone 4a | — | May 18 – June 1 | — |
| Zone 4b | — | May 14 – May 28 | — |
| Zone 5a | — | May 16 – May 30 | — |
| Zone 5b | — | May 8 – May 22 | — |
| Zone 6a | — | May 4 – May 18 | — |
| Zone 6b | — | April 27 – May 11 | — |
| Zone 7a | — | April 19 – May 3 | — |
| Zone 7b | — | April 10 – April 24 | — |
| Zone 8a | — | March 30 – April 13 | — |
| Zone 8b | — | March 20 – April 3 | — |
| Zone 9a | — | March 6 – March 20 | — |
| Zone 9b | — | February 6 – February 20 | — |
| Zone 10a | — | January 19 – February 2 | — |
| Zone 10b | — | January 24 – February 7 | — |
What you'll need
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Calendar computed 2026-09-27. Sources: University of New Hampshire Cooperative Extension — “Growing Vegetables: When to Plant Your Vegetable Garden”; University of Georgia Extension — Vegetable Planting Chart (Circular C963) (days to maturity); NOAA NCEI 1991–2020 Climate Normals (frost); USDA 2023 Plant Hardiness Zone Map.