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Last and first frost dates in Tlemcen

Algeria

In Tlemcen the last spring frost usually comes around 17 February and the first autumn frost around 1 January, which leaves about 318 frost-free days (median of 2016–2025). Tomato seedlings can go into open ground from 18 March to 11 September.

Last spring frostaround 17 February
First autumn frostaround 1 January
Frost-free days318 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 is the last frost in Tlemcen?

The last frost in Tlemcen usually comes around 17 February: 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 27 January, while corn waits until 24 February. The first autumn frost follows around 1 January, about 318 days later: harvest or cover frost-tender crops before then.

When to sow and plant

CropSow for seedlingsPlant out in a greenhouseOpen ground
Achocha25 December – 23 September3 February – 2 November24 February – 2 November
Ageratumfrom 31 December—from 18 March
Arugula——sow 27 January – 27 November
Basil22 February – 30 October1 April – 7 December22 April – 7 December
Beet——sow 27 January – 2 November
Bell Pepper31 January – 13 July1 April – 11 September22 April – 11 September
Black-eyed Susanfrom 3 December—from 24 February
Bok Choy30 December – 10 November3 February – 15 December24 February – 15 December
Borage——sow 24 February – 7 November
Broad bean——sow 27 January – 23 September
Broccoli——sow 27 January – 16 September
Brussels Sprouts22 November – 14 August6 January – 28 September27 January – 28 September
Busy Lizziefrom 2 December—from 24 February
Cabbage——sow 27 January – 24 August
Calendula——sow from 27 January
Carrot——sow 27 January – 9 October
Cauliflower25 November – 16 September6 January – 28 October27 January – 28 October
Celeriac18 November – 14 July3 February – 29 September24 February – 29 September
Celery18 November – 24 July3 February – 9 October24 February – 9 October
Celosiafrom 8 Februaryfrom 25 Marchfrom 15 April
Chamomile——sow 27 January – 28 October
Chayote7 November – 7 July3 February – 3 October24 February – 3 October
Chickpea——sow 27 January – 13 September
Chicory12 December – 8 October—27 January – 2 November
Chili Pepper31 January – 19 August1 April – 18 October22 April – 18 October
China asterfrom 8 Februaryfrom 1 Aprilfrom 22 April
Chives——sow 27 January – 19 October
Cilantro——sow 27 January – 29 October
Corn——sow 24 February – 13 September
Corn poppy——sow from 27 January
Cosmosfrom 8 Februaryfrom 25 Marchfrom 15 April
Cucumber4 March – 19 September1 April – 17 October22 April – 17 October
Daikon——sow 27 January – 26 October
Delphiniumfrom 8 November—from 27 January
Dill——sow 27 January – 8 November
Edging lobeliafrom 2 December—from 24 February
Eggplant31 January – 13 July1 April – 11 September22 April – 11 September
Florence fennel20 December – 23 September3 February – 7 November24 February – 7 November
Foxglovefrom 21 October—from 27 January
Garden sorrel——sow 27 January – 27 October
Green Beans——sow 15 April – 21 September
Hollyhock——sow from 27 January
Hyssop——sow 27 January – 19 September
Kale——sow 27 January – 21 October
Kiwano24 January – 26 September25 February – 28 October18 March – 28 October
Kohlrabi——sow 27 January – 31 October
Leek28 October – 5 July6 January – 13 September27 January – 13 September
Lemon balm——sow 27 January – 23 October
Lettuce——sow 27 January – 5 November
Lisianthusfrom 11 Octoberfrom 6 Januaryfrom 27 January
Lovage——sow from 27 January
Luffa18 February – 21 July1 April – 1 September22 April – 1 September
Marigoldfrom 23 Decemberfrom 3 Februaryfrom 24 February
Marjoram31 January – 8 October—22 April – 7 December
Melon4 March – 6 September1 April – 4 October22 April – 4 October
Microgreens——sow 15 April – 18 December
Moringa23 February – 13 October19 April – 7 December10 May – 7 December
Moss rosefrom 9 December—from 24 February
Mustard greens——sow 27 January – 17 November
Napa cabbage1 January – 18 October3 February – 20 November24 February – 20 November
Nasturtiumfrom 27 Decemberfrom 3 Februaryfrom 24 February
Okra18 February – 1 October1 April – 12 November22 April – 12 November
Oregano7 November – 28 September6 January – 27 November27 January – 27 November
Pansyfrom 11 Novemberfrom 6 Januaryfrom 27 January
Parsley——sow 27 January – 17 October
Parsnip——sow 27 January – 5 September
Peanut23 February – 27 August1 April – 3 October22 April – 3 October
Peas——sow 27 January – 19 October
Petuniafrom 28 Januaryfrom 1 Aprilfrom 22 April
Physalis11 January – 24 August25 February – 8 October18 March – 8 October
Pumpkin18 February – 26 July1 April – 6 September22 April – 6 September
Purple coneflowerfrom 5 November—from 27 January
Radish——sow 27 January – 2 December
Sage18 November – 24 September6 January – 12 November27 January – 12 November
Scarlet sagefrom 4 January—from 18 March
Snapdragonfrom 2 Novemberfrom 6 Januaryfrom 27 January
Soybean——sow 22 April – 13 October
Spinach——sow 27 January – 7 November
Stevia7 January – 15 August25 February – 3 October18 March – 3 October
Stock——sow from 27 January
Sunflower——sow from 15 April
Sweet alyssum——sow from 27 January
Sweet Corn12 January – 8 October3 February – 30 October24 February – 30 October
Sweet peafrom 25 Novemberfrom 6 Januaryfrom 27 January
Sweet William——sow from 27 January
Swiss Chard——sow 27 January – 2 November
Thyme——sow 27 January – 13 September
Tomato4 January – 21 July25 February – 11 September18 March – 11 September
Turnip——sow 27 January – 4 November
Watercress——sow 27 January – 15 November
Watermelon4 March – 25 August1 April – 22 September22 April – 22 September
Zinniafrom 15 Marchfrom 19 Aprilfrom 10 May
Zucchini11 March – 24 September1 April – 15 October22 April – 15 October

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 Tlemcen

The day the top 7 cm of soil first averages each temperature over a week, median of 2016–2025 (ERA5 via Open-Meteo).

SoilDateAgainst the last spring frost
5 °Calready in the first week of January—
10 °Calready in the first week of January—
15 °C18 March29 days later
18 °C22 April64 days later

Frost dates near Tlemcen

CityDistanceLast spring frostFirst autumn frost
Oran111 km——
Melilla155 km——
Almería241 km——
Motril287 km——
Cartagena304 km——

What to grow at home in winter in Tlemcen

Frosts in Tlemcen usually come from about 1 January to about 17 February. These plants have indoor care in their Greenly cards and are harvested quickly, so they can be sown on a windowsill in winter.

Weather in Tlemcen by month

Average weather in Tlemcen over 2016–2025: the warmest month is August. Months that average 20 °C or more by day: April–November (20.1–34.7 °C). Months that average 30 °C or more by day: July (34.4 °C) and August (34.7 °C). No month averages below 0 °C at night; the coldest nights, in January, average 6.3 °C. About 443 mm of rain falls in a year, on 67 days; March is the wettest month (81 mm) and July the driest (2 mm).

MonthDay, °CNight, °CRain, mmRainy days
January15.66.3628
February17.47.7456
March18.88.78111
April21.410.7689
May25.413.9296
June29.917.7102
July34.421.220
August34.721.762
September29.818.5224
October26.315.1264
November20.110.7407
December16.88528

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).

Planted in autumn

CropWhen to plant
Bearded Irisby 2 December
Crocusby 2 December
Daffodilby 2 December
Garlicby 2 December
Grape hyacinthby 2 December
Helleboreby 2 December
Hyacinthby 2 December
Lilyby 2 December
Ornamental onionby 2 December
Peonyby 2 December
Saffronby 2 December
Snowdropby 2 December
Tulipby 2 December
Wild garlicby 2 December

From a month before the first autumn frost, so the roots grow before winter, to the late-planting limit on each crop’s page (about two weeks before the ground freezes, by ten years of weather).