GreenlyIstanbul: frost dates
Turkey
In Istanbul the last spring frost usually comes around 28 February and the first autumn frost around 26 December, which leaves about 301 frost-free days (median of 2016–2025). Tomato seedlings can go into open ground around 28 April.
| Last spring frost | around 28 February |
|---|---|
| First autumn frost | around 26 December |
| Frost-free days | 301 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 | 5 February | 20 April | 11 May |
| Chili Pepper | 13 February | 28 April | 19 May |
| Corn | — | 23 February | sow 16 March |
| Cucumber | 9 March | 20 April | 11 May |
| Eggplant | 9 February | 20 April | 11 May |
| Green Beans | 17 January | 23 February | 16 March |
| Melon | 27 February | 20 April | 11 May |
| Peas | — | 17 January | sow 7 February |
| Physalis | 21 February | 7 April | 28 April |
| Pumpkin | 1 March | 7 April | 28 April |
| Sweet Corn | — | 23 February | sow 16 March |
| Tomato | 9 February | 7 April | 28 April |
| Watermelon | 19 March | 20 April | 11 May |
| Zucchini | 6 March | 7 April | 28 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.
Istanbul: 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 | 26 November |
| Daffodil | 26 November |
| Garlic | 26 November |
| Hyacinth | 26 November |
| Lily | 26 November |
| Tulip | 26 November |
A month before the first autumn frost, so the roots grow before winter.