GreenlyRosario: frost dates
Argentina
In Rosario the last spring frost usually comes around 16 July and the first autumn frost around 15 June, which leaves about 334 frost-free days (median of 2016–2025). Tomato seedlings can go into open ground around 15 August.
| Last spring frost | around 16 July |
|---|---|
| First autumn frost | around 15 June |
| Frost-free days | 334 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 | 23 May | 2 July | 23 July |
| Arugula | — | 4 June | sow 25 June |
| Basil | 1 August | 8 September | 29 September |
| Beet | — | 4 June | sow 25 June |
| Bell Pepper | 26 June | 8 September | 29 September |
| Black-eyed Susan | 22 May | — | 23 July |
| Bok Choy | 28 May | 2 July | 23 July |
| Broad bean | — | 4 June | sow 25 June |
| Broccoli | — | 4 June | sow 25 June |
| Brussels Sprouts | 20 April | 4 June | 25 June |
| Cabbage | — | 4 June | sow 25 June |
| Calendula | — | 4 June | sow 25 June |
| Carrot | — | — | sow 25 June |
| Cauliflower | 23 April | 4 June | 25 June |
| Celeriac | 16 April | 2 July | 23 July |
| Celery | 16 April | 2 July | 23 July |
| Celosia | 2 July | 16 August | 6 September |
| Chamomile | — | 4 June | sow 25 June |
| Chayote | 5 April | 2 July | 23 July |
| Chickpea | — | — | sow 25 June |
| Chili Pepper | 10 July | 22 September | 13 October |
| China aster | 18 July | 8 September | 29 September |
| Chives | — | — | sow 25 June |
| Cilantro | — | 4 June | sow 25 June |
| Corn | — | 2 July | sow 23 July |
| Cosmos | 2 July | 16 August | 6 September |
| Cucumber | 28 July | 8 September | 29 September |
| Daikon | — | 4 June | sow 25 June |
| Delphinium | 27 April | — | 25 June |
| Dill | — | 4 June | sow 25 June |
| Eggplant | 30 June | 8 September | 29 September |
| Florence fennel | 18 May | 2 July | 23 July |
| Garden sorrel | — | 4 June | sow 25 June |
| Green Beans | 26 May | 2 July | 23 July |
| Hyssop | — | — | sow 25 June |
| Kale | — | 4 June | sow 25 June |
| Kiwano | 23 June | 25 July | 15 August |
| Kohlrabi | — | 4 June | sow 25 June |
| Leek | 26 March | 4 June | 25 June |
| Lemon balm | — | 4 June | sow 25 June |
| Lettuce | — | 4 June | sow 25 June |
| Lisianthus | 9 March | 4 June | 25 June |
| Lovage | — | — | sow 25 June |
| Luffa | 28 July | 8 September | 29 September |
| Marigold | 21 May | 2 July | 23 July |
| Melon | 18 July | 8 September | 29 September |
| Microgreens | — | 16 August | sow 6 September |
| Moringa | 29 July | 22 September | 13 October |
| Mustard greens | — | 4 June | sow 25 June |
| Napa cabbage | 30 May | 2 July | 23 July |
| Nasturtium | 25 May | 2 July | 23 July |
| Okra | 28 July | 8 September | 29 September |
| Oregano | 5 April | 4 June | 25 June |
| Pansy | 9 April | 4 June | 25 June |
| Parsley | — | 4 June | sow 25 June |
| Parsnip | — | — | sow 25 June |
| Peanut | 2 August | 8 September | 29 September |
| Peas | — | 4 June | sow 25 June |
| Petunia | 7 July | 8 September | 29 September |
| Physalis | 10 June | 25 July | 15 August |
| Pumpkin | 18 June | 25 July | 15 August |
| Purple coneflower | 24 April | — | 25 June |
| Radish | — | — | sow 25 June |
| Sage | 16 April | 4 June | 25 June |
| Snapdragon | 31 March | 4 June | 25 June |
| Spinach | — | 4 June | sow 25 June |
| Stevia | 6 June | 25 July | 15 August |
| Stock | — | 4 June | sow 25 June |
| Sunflower | — | 16 August | sow 6 September |
| Sweet Corn | — | 2 July | sow 23 July |
| Sweet pea | 23 April | 4 June | 25 June |
| Sweet William | — | — | sow 25 June |
| Swiss Chard | — | 4 June | sow 25 June |
| Thyme | — | 4 June | sow 25 June |
| Tomato | 29 May | 25 July | 15 August |
| Turnip | — | 4 June | sow 25 June |
| Watercress | — | 4 June | sow 25 June |
| Watermelon | 7 August | 8 September | 29 September |
| Zinnia | 18 August | 22 September | 13 October |
| Zucchini | 23 June | 25 July | 15 August |
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.
Rosario: 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 | 16 May |
| Crocus | 16 May |
| Daffodil | 16 May |
| Garlic | 16 May |
| Hyacinth | 16 May |
| Lily | 16 May |
| Peony | 16 May |
| Saffron | 16 May |
| Tulip | 16 May |
| Wild garlic | 16 May |
A month before the first autumn frost, so the roots grow before winter.