GreenlyLast and first frost dates in Mar del Plata
Argentina
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| Last spring frost | around 15 July |
|---|---|
| First autumn frost | none in ten years |
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 is the last frost in Mar del Plata?
The last frost in Mar del Plata usually comes around 15 July: that is the median of 2016–2025, so in about half of those years the last night at or below 0 °C came later. Hardy crops start before it and frost-tender ones only after it: in the table below arugula can go into open ground from 24 June, while corn waits until 2 September.
When to sow and plant
| Crop | Sow for seedlings | Plant out in a greenhouse | Open ground |
|---|---|---|---|
| Achocha | from 22 May | from 1 July | from 22 July |
| Ageratum | from 2 August | — | from 18 October |
| Arugula | — | — | sow from 24 June |
| Basil | from 14 September | from 22 October | from 12 November |
| Beet | — | — | sow from 24 June |
| Bell Pepper | from 23 August | from 22 October | from 12 November |
| Black-eyed Susan | from 30 April | — | from 22 July |
| Bok Choy | from 27 May | from 1 July | from 22 July |
| Borage | — | — | sow from 22 July |
| Broad bean | — | — | sow from 24 June |
| Broccoli | — | — | sow from 24 June |
| Brussels Sprouts | from 19 April | from 3 June | from 24 June |
| Busy Lizzie | from 29 April | — | from 22 July |
| Cabbage | — | — | sow from 24 June |
| Calendula | — | — | sow from 24 June |
| Carrot | — | — | sow from 24 June |
| Cauliflower | from 22 April | from 3 June | from 24 June |
| Celeriac | from 15 April | from 1 July | from 22 July |
| Celery | from 15 April | from 1 July | from 22 July |
| Celosia | from 18 August | from 2 October | from 23 October |
| Chamomile | — | — | sow from 24 June |
| Chayote | from 16 May | from 12 August | from 2 September |
| Chickpea | — | — | sow from 24 June |
| Chicory | from 9 May | — | from 24 June |
| Chili Pepper | from 23 August | from 22 October | from 12 November |
| China aster | from 31 August | from 22 October | from 12 November |
| Chives | — | — | sow from 24 June |
| Cilantro | — | — | sow from 24 June |
| Corn | — | — | sow from 2 September |
| Corn poppy | — | — | sow from 24 June |
| Cosmos | from 18 August | from 2 October | from 23 October |
| Cucumber | from 24 September | from 22 October | from 12 November |
| Daikon | — | — | sow from 24 June |
| Delphinium | from 5 April | — | from 24 June |
| Dill | — | — | sow from 24 June |
| Edging lobelia | from 29 April | — | from 22 July |
| Eggplant | from 23 August | from 22 October | from 12 November |
| Florence fennel | from 17 May | from 1 July | from 22 July |
| Foxglove | from 18 March | — | from 24 June |
| Garden sorrel | — | — | sow from 24 June |
| Green Beans | — | — | sow from 23 October |
| Hollyhock | — | — | sow from 24 June |
| Hyssop | — | — | sow from 24 June |
| Kale | — | — | sow from 24 June |
| Kiwano | from 26 August | from 27 September | from 18 October |
| Kohlrabi | — | — | sow from 24 June |
| Leek | from 25 March | from 3 June | from 24 June |
| Lemon balm | — | — | sow from 24 June |
| Lettuce | — | — | sow from 24 June |
| Lisianthus | from 8 March | from 3 June | from 24 June |
| Lovage | — | — | sow from 24 June |
| Luffa | from 10 September | from 22 October | from 12 November |
| Marigold | from 20 May | from 1 July | from 22 July |
| Marjoram | from 23 August | — | from 12 November |
| Melon | from 24 September | from 22 October | from 12 November |
| Microgreens | — | — | sow from 23 October |
| Moringa | from 13 September | from 7 November | from 28 November |
| Moss rose | from 6 May | — | from 22 July |
| Mustard greens | — | — | sow from 24 June |
| Napa cabbage | from 29 May | from 1 July | from 22 July |
| Nasturtium | from 24 May | from 1 July | from 22 July |
| Okra | from 10 September | from 22 October | from 12 November |
| Oregano | from 4 April | from 3 June | from 24 June |
| Pansy | from 8 April | from 3 June | from 24 June |
| Parsley | — | — | sow from 24 June |
| Parsnip | — | — | sow from 24 June |
| Peanut | from 15 September | from 22 October | from 12 November |
| Peas | — | — | sow from 24 June |
| Petunia | from 20 August | from 22 October | from 12 November |
| Physalis | from 13 August | from 27 September | from 18 October |
| Pumpkin | from 10 September | from 22 October | from 12 November |
| Purple coneflower | from 2 April | — | from 24 June |
| Radish | — | — | sow from 24 June |
| Sage | from 15 April | from 3 June | from 24 June |
| Scarlet sage | from 6 August | — | from 18 October |
| Snapdragon | from 30 March | from 3 June | from 24 June |
| Soybean | — | — | sow from 12 November |
| Spinach | — | — | sow from 24 June |
| Stevia | from 9 August | from 27 September | from 18 October |
| Stock | — | — | sow from 24 June |
| Sunflower | — | — | sow from 23 October |
| Sweet alyssum | — | — | sow from 24 June |
| Sweet Corn | from 11 August | from 2 September | from 23 September |
| Sweet pea | from 22 April | from 3 June | from 24 June |
| Sweet William | — | — | sow from 24 June |
| Swiss Chard | — | — | sow from 24 June |
| Thyme | — | — | sow from 24 June |
| Tomato | from 6 August | from 27 September | from 18 October |
| Turnip | — | — | sow from 24 June |
| Watercress | — | — | sow from 24 June |
| Watermelon | from 24 September | from 22 October | from 12 November |
| Zinnia | from 3 October | from 7 November | from 28 November |
| Zucchini | from 1 October | from 22 October | from 12 November |
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. Each window starts on the Greenly calendar date and ends on the last day that still leaves the crop’s days to harvest (from its card) before the average first autumn frost, plus six weeks of picking for crops harvested over weeks (tomatoes, peppers, aubergines, cucumbers, courgettes, pumpkins, watermelons, beans) — our rule; earlier in the window is safer.
When the soil warms up in Mar del Plata
The day the top 7 cm of soil first averages each temperature over a week, median of 2016–2025 (ERA5 via Open-Meteo). The soil reaches 10 °C 4 days after the last spring frost and 15 °C 95 days after it.
| Soil | Date | Against the last spring frost |
|---|---|---|
| 5 °C | already in the first week of July | — |
| 10 °C | 19 July | 4 days later |
| 15 °C | 18 October | 95 days later |
| 18 °C | 12 November | 120 days later |
Frost dates near Mar del Plata
Of the nearest cities on our list, the last spring frost ends earliest in Las Piedras (11 July) and latest in Tandil (24 August).
| City | Distance | Last spring frost | First autumn frost |
|---|---|---|---|
| Tandil | 158 km | 24 August | 15 June |
| La Plata | 344 km | 30 July | 17 June |
| Montevideo | 367 km | — | — |
| Las Piedras | 383 km | 11 July | — |
| Buenos Aires | 385 km | 14 July | — |
Seeds, seedlings and markets in Mar del Plata
Within 15 km of Mar del Plata OpenStreetMap lists 6 garden centres, 1 farm-supply shop, 17 markets and 2 farm shops (collected 27 October 2026). The nearest garden centre to the city centre is Floreria Y Regaleria Llantén, 3 km away.
- Floreria Y Regaleria Llantén — garden centre
Avenida Pedro Luro 6563 · 3 km - Dietética JB Justo y Córdoba — market
Avenida Juan B. Justo, 7600 · 3 km - Mercado de Chile — farm shop
Chile 1455 · 2 km - San Remo — garden centre
Avenida Pedro Luro 6612 · 3 km - FERIA LURO — market
Avenida Pedro Luro 5959 · 3 km - La Escondida — farm shop
Avenida Colón 6499 · 3 km
Places: © OpenStreetMap contributors, ODbL.
Mar del Plata: weather for the next 7 days
Forecast by Open-Meteo. Nights at or below 0 °C are marked as frost.
Weather in Mar del Plata by month
Average weather in Mar del Plata over 2016–2025: the warmest month is January. Months that average 20 °C or more by day: November–March (20.9–25.7 °C). No month averages below 0 °C at night; the coldest nights, in July, average 6 °C. About 857 mm of rain falls in a year, on 100 days; April is the wettest month (93 mm) and August the driest (44 mm).
| Month | Day, °C | Night, °C | Rain, mm | Rainy days |
|---|---|---|---|---|
| January | 25.7 | 17.1 | 66 | 8 |
| February | 24.9 | 17.3 | 92 | 10 |
| March | 22.7 | 15.6 | 79 | 10 |
| April | 19.5 | 13.1 | 93 | 9 |
| May | 15.6 | 9.7 | 64 | 7 |
| June | 13.1 | 7 | 52 | 8 |
| July | 12.2 | 6 | 68 | 8 |
| August | 13.8 | 6.7 | 44 | 6 |
| September | 15.4 | 7.9 | 62 | 7 |
| October | 17.9 | 9.9 | 67 | 9 |
| November | 20.9 | 12.6 | 79 | 9 |
| December | 23.8 | 15 | 91 | 9 |
Average of the daily highs and lows, rain per month and days with at least 1 mm (ERA5 via Open-Meteo, the same grid cell as the frost dates).
