GreenlyZaragoza: frost dates
Spain
| Last spring frost | around 28 January |
|---|---|
| First autumn frost | around 20 December |
| Frost-free days | 326 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 | 25 January | 9 April | 30 April |
| Chili Pepper | 6 February | 21 April | 12 May |
| Corn | — | 15 February | sow 8 March |
| Cucumber | 26 February | 9 April | 30 April |
| Eggplant | 29 January | 9 April | 30 April |
| Green Beans | 9 January | 15 February | 8 March |
| Melon | 16 February | 9 April | 30 April |
| Peas | — | 17 December | sow 7 January |
| Physalis | 26 January | 12 March | 2 April |
| Pumpkin | 3 February | 12 March | 2 April |
| Sweet Corn | — | 15 February | sow 8 March |
| Tomato | 14 January | 12 March | 2 April |
| Watermelon | 8 March | 9 April | 30 April |
| Zucchini | 8 February | 12 March | 2 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.
Planted in autumn
| Crop | Plant around |
|---|---|
| Crocus | 20 November |
| Daffodil | 20 November |
| Garlic | 20 November |
| Hyacinth | 20 November |
| Lily | 20 November |
| Tulip | 20 November |
A month before the first autumn frost, so the roots grow before winter.