GreenlyCork: frost dates
Ireland
In Cork the last spring frost usually comes around 3 April and the first autumn frost around 21 November, which leaves about 232 frost-free days (median of 2016–2025). Tomato seedlings can go into open ground around 10 June.
| Last spring frost | around 3 April |
|---|---|
| First autumn frost | around 21 November |
| Frost-free days | 232 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 | 20 February | 1 April | 22 April |
| Arugula | — | 20 February | sow 13 March |
| Basil | 17 May | 24 June | 15 July |
| Beet | — | 20 February | sow 13 March |
| Bell Pepper | 11 April | 24 June | 15 July |
| Black-eyed Susan | 19 February | — | 22 April |
| Bok Choy | 25 February | 1 April | 22 April |
| Broad bean | — | 20 February | sow 13 March |
| Broccoli | — | 20 February | sow 13 March |
| Brussels Sprouts | 6 January | 20 February | 13 March |
| Cabbage | — | 20 February | sow 13 March |
| Calendula | — | 20 February | sow 13 March |
| Carrot | — | — | sow 13 March |
| Cauliflower | 9 January | 20 February | 13 March |
| Celeriac | 14 January | 1 April | 22 April |
| Celery | 14 January | 1 April | 22 April |
| Celosia | 15 April | 30 May | 20 June |
| Chamomile | — | 20 February | sow 13 March |
| Chayote | 29 January | 27 April | 18 May |
| Chickpea | — | — | sow 13 March |
| Chili Pepper | 9 April | 22 June | 13 July |
| China aster | 3 May | 24 June | 15 July |
| Chives | — | — | sow 13 March |
| Cilantro | — | 20 February | sow 13 March |
| Corn | — | 27 April | sow 18 May |
| Cosmos | 15 April | 30 May | 20 June |
| Cucumber | 13 May | 24 June | 15 July |
| Daikon | — | 20 February | sow 13 March |
| Delphinium | 13 January | — | 13 March |
| Dill | — | 20 February | sow 13 March |
| Eggplant | 15 April | 24 June | 15 July |
| Florence fennel | 15 February | 1 April | 22 April |
| Garden sorrel | — | 20 February | sow 13 March |
| Green Beans | 21 March | 27 April | 18 May |
| Hyssop | — | — | sow 13 March |
| Kale | — | 20 February | sow 13 March |
| Kiwano | 18 April | 20 May | 10 June |
| Kohlrabi | — | 20 February | sow 13 March |
| Leek | 12 December | 20 February | 13 March |
| Lemon balm | — | 20 February | sow 13 March |
| Lettuce | — | 20 February | sow 13 March |
| Lisianthus | 25 November | 20 February | 13 March |
| Lovage | — | — | sow 13 March |
| Luffa | 13 May | 24 June | 15 July |
| Marigold | 18 February | 1 April | 22 April |
| Melon | 3 May | 24 June | 15 July |
| Microgreens | — | 30 May | sow 20 June |
| Moringa | 28 April | 22 June | 13 July |
| Mustard greens | — | 20 February | sow 13 March |
| Napa cabbage | 27 February | 1 April | 22 April |
| Nasturtium | 22 February | 1 April | 22 April |
| Okra | 13 May | 24 June | 15 July |
| Oregano | 22 December | 20 February | 13 March |
| Pansy | 26 December | 20 February | 13 March |
| Parsley | — | 20 February | sow 13 March |
| Parsnip | — | — | sow 13 March |
| Peanut | 18 May | 24 June | 15 July |
| Peas | — | 20 February | sow 13 March |
| Petunia | 22 April | 24 June | 15 July |
| Physalis | 5 April | 20 May | 10 June |
| Pumpkin | 13 April | 20 May | 10 June |
| Purple coneflower | 10 January | — | 13 March |
| Radish | — | — | sow 13 March |
| Sage | 2 January | 20 February | 13 March |
| Snapdragon | 17 December | 20 February | 13 March |
| Spinach | — | 20 February | sow 13 March |
| Stevia | 1 April | 20 May | 10 June |
| Stock | — | 20 February | sow 13 March |
| Sunflower | — | 30 May | sow 20 June |
| Sweet Corn | — | 27 April | sow 18 May |
| Sweet pea | 9 January | 20 February | 13 March |
| Sweet William | — | — | sow 13 March |
| Swiss Chard | — | 20 February | sow 13 March |
| Thyme | — | 20 February | sow 13 March |
| Tomato | 24 March | 20 May | 10 June |
| Turnip | — | 20 February | sow 13 March |
| Watercress | — | 20 February | sow 13 March |
| Watermelon | 23 May | 24 June | 15 July |
| Zinnia | 18 May | 22 June | 13 July |
| Zucchini | 18 April | 20 May | 10 June |
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.
Cork: 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 | 22 October |
| Crocus | 22 October |
| Daffodil | 22 October |
| Garlic | 22 October |
| Hyacinth | 22 October |
| Lily | 22 October |
| Peony | 22 October |
| Saffron | 22 October |
| Tulip | 22 October |
| Wild garlic | 22 October |
A month before the first autumn frost, so the roots grow before winter.