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 |
|---|---|---|---|
| Achocha | 5 January | 14 February | 7 March |
| Arugula | — | 17 January | sow 7 February |
| Basil | 13 March | 20 April | 11 May |
| Beet | — | 17 January | sow 7 February |
| Bell Pepper | 5 February | 20 April | 11 May |
| Black-eyed Susan | 4 January | — | 7 March |
| Bok Choy | 10 January | 14 February | 7 March |
| Broad bean | — | 17 January | sow 7 February |
| Broccoli | — | 17 January | sow 7 February |
| Brussels Sprouts | 3 December | 17 January | 7 February |
| Cabbage | — | 17 January | sow 7 February |
| Calendula | — | 17 January | sow 7 February |
| Carrot | — | — | sow 7 February |
| Cauliflower | 6 December | 17 January | 7 February |
| Celeriac | 29 November | 14 February | 7 March |
| Celery | 29 November | 14 February | 7 March |
| Celosia | 22 February | 8 April | 29 April |
| Chamomile | — | 17 January | sow 7 February |
| Chayote | 27 November | 23 February | 16 March |
| Chickpea | — | — | sow 7 February |
| Chili Pepper | 13 February | 28 April | 19 May |
| China aster | 27 February | 20 April | 11 May |
| Chives | — | — | sow 7 February |
| Cilantro | — | 17 January | sow 7 February |
| Corn | — | 23 February | sow 16 March |
| Cosmos | 22 February | 8 April | 29 April |
| Cucumber | 9 March | 20 April | 11 May |
| Daikon | — | 17 January | sow 7 February |
| Delphinium | 10 December | — | 7 February |
| Dill | — | 17 January | sow 7 February |
| Eggplant | 9 February | 20 April | 11 May |
| Florence fennel | 31 December | 14 February | 7 March |
| Garden sorrel | — | 17 January | sow 7 February |
| Green Beans | 17 January | 23 February | 16 March |
| Hyssop | — | — | sow 7 February |
| Kale | — | 17 January | sow 7 February |
| Kiwano | 6 March | 7 April | 28 April |
| Kohlrabi | — | 17 January | sow 7 February |
| Leek | 8 November | 17 January | 7 February |
| Lemon balm | — | 17 January | sow 7 February |
| Lettuce | — | 17 January | sow 7 February |
| Lisianthus | 22 October | 17 January | 7 February |
| Lovage | — | — | sow 7 February |
| Luffa | 9 March | 20 April | 11 May |
| Marigold | 3 January | 14 February | 7 March |
| Melon | 27 February | 20 April | 11 May |
| Microgreens | — | 8 April | sow 29 April |
| Moringa | 4 March | 28 April | 19 May |
| Mustard greens | — | 17 January | sow 7 February |
| Napa cabbage | 12 January | 14 February | 7 March |
| Nasturtium | 7 January | 14 February | 7 March |
| Okra | 9 March | 20 April | 11 May |
| Oregano | 18 November | 17 January | 7 February |
| Pansy | 22 November | 17 January | 7 February |
| Parsley | — | 17 January | sow 7 February |
| Parsnip | — | — | sow 7 February |
| Peanut | 14 March | 20 April | 11 May |
| Peas | — | 17 January | sow 7 February |
| Petunia | 16 February | 20 April | 11 May |
| Physalis | 21 February | 7 April | 28 April |
| Pumpkin | 1 March | 7 April | 28 April |
| Purple coneflower | 7 December | — | 7 February |
| Radish | — | — | sow 7 February |
| Sage | 29 November | 17 January | 7 February |
| Snapdragon | 13 November | 17 January | 7 February |
| Spinach | — | 17 January | sow 7 February |
| Stevia | 17 February | 7 April | 28 April |
| Stock | — | 17 January | sow 7 February |
| Sunflower | — | 8 April | sow 29 April |
| Sweet Corn | — | 23 February | sow 16 March |
| Sweet pea | 6 December | 17 January | 7 February |
| Sweet William | — | — | sow 7 February |
| Swiss Chard | — | 17 January | sow 7 February |
| Thyme | — | 17 January | sow 7 February |
| Tomato | 9 February | 7 April | 28 April |
| Turnip | — | 17 January | sow 7 February |
| Watercress | — | 17 January | sow 7 February |
| Watermelon | 19 March | 20 April | 11 May |
| Zinnia | 24 March | 28 April | 19 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 |
|---|---|
| Bearded Iris | 26 November |
| Crocus | 26 November |
| Daffodil | 26 November |
| Garlic | 26 November |
| Hyacinth | 26 November |
| Lily | 26 November |
| Peony | 26 November |
| Saffron | 26 November |
| Tulip | 26 November |
| Wild garlic | 26 November |
A month before the first autumn frost, so the roots grow before winter.