GreenlyRome: frost dates
Italy
In Rome the last spring frost usually comes around 27 January and the first autumn frost around 10 December, which leaves about 317 frost-free days (median of 2016–2025). Tomato seedlings can go into open ground around 14 April.
| Last spring frost | around 27 January |
|---|---|
| First autumn frost | around 10 December |
| Frost-free days | 317 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 | 14 February | 29 April | 20 May |
| Chili Pepper | 21 February | 6 May | 27 May |
| Corn | — | 27 February | sow 20 March |
| Cucumber | 18 March | 29 April | 20 May |
| Eggplant | 18 February | 29 April | 20 May |
| Green Beans | 21 January | 27 February | 20 March |
| Melon | 8 March | 29 April | 20 May |
| Peas | — | 16 December | sow 6 January |
| Physalis | 7 February | 24 March | 14 April |
| Pumpkin | 15 February | 24 March | 14 April |
| Sweet Corn | — | 27 February | sow 20 March |
| Tomato | 26 January | 24 March | 14 April |
| Watermelon | 28 March | 29 April | 20 May |
| Zucchini | 20 February | 24 March | 14 April |
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.
Rome: weather for the next 7 days
Forecast by Open-Meteo. Nights at or below 0 °C are marked as frost.
Planted in autumn
| Crop | Plant around |
|---|---|
| Crocus | 10 November |
| Daffodil | 10 November |
| Garlic | 10 November |
| Hyacinth | 10 November |
| Lily | 10 November |
| Tulip | 10 November |
A month before the first autumn frost, so the roots grow before winter.