GreenlyNew York: frost dates
United States
| Last spring frost | around 3 April |
|---|---|
| First autumn frost | around 20 November |
| Frost-free days | 231 days |
Median of 2016–2025 for the 25 km grid cell of the city: the last day at or below 0 °C in spring and the first in autumn (ERA5 reanalysis via Open-Meteo). In a cold year a frost can come a week or two later — Greenly warns 48 hours ahead.
When to sow and plant
| Crop | Sow for seedlings | Plant out in a greenhouse | Open ground |
|---|---|---|---|
| Bell Pepper | 15 February | 30 April | 21 May |
| Chili Pepper | 25 February | 10 May | 31 May |
| Corn | — | 24 March | sow 14 April |
| Cucumber | 19 March | 30 April | 21 May |
| Eggplant | 19 February | 30 April | 21 May |
| Green Beans | 15 February | 24 March | 14 April |
| Melon | 9 March | 30 April | 21 May |
| Peas | — | 20 February | sow 13 March |
| Physalis | 26 February | 12 April | 3 May |
| Pumpkin | 6 March | 12 April | 3 May |
| Sweet Corn | — | 24 March | sow 14 April |
| Tomato | 14 February | 12 April | 3 May |
| Watermelon | 29 March | 30 April | 21 May |
| Zucchini | 11 March | 12 April | 3 May |
Planting out: a week after the last frost once the soil is warm enough for the crop; frost-hardy crops three weeks before it; an unheated greenhouse three weeks earlier. Seedlings are sown so they are ready on that day.
Planted in autumn
| Crop | Plant around |
|---|---|
| Crocus | 21 October |
| Daffodil | 21 October |
| Garlic | 21 October |
| Hyacinth | 21 October |
| Lily | 21 October |
| Tulip | 21 October |
A month before the first autumn frost, so the roots grow before winter.