Planting guides by USDA hardiness zone
Worked threshold examples for tomato, lettuce and pea across USDA zones 3 through 10, each with the official USDA winter-minimum range, this app's preset thresholds, and a prefilled link into the live calculator.
| Crop | Zone 3 | Zone 4 | Zone 5 | Zone 6 | Zone 7 | Zone 8 | Zone 9 | Zone 10 |
|---|---|---|---|---|---|---|---|---|
| Tomato | Zone 3 | Zone 4 | Zone 5 | Zone 6 | Zone 7 | Zone 8 | Zone 9 | Zone 10 |
| Lettuce | Zone 3 | Zone 4 | Zone 5 | Zone 6 | Zone 7 | Zone 8 | Zone 9 | Zone 10 |
| Pea | Zone 3 | Zone 4 | Zone 5 | Zone 6 | Zone 7 | Zone 8 | Zone 9 | Zone 10 |
Zone data: USDA Plant Hardiness Zone Map. Machine-readable rows: /data/planting-zones.json.