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Last and first frost dates in Gwangju

South Korea

In Gwangju the last spring frost usually comes around 1 April and the first autumn frost around 23 November, which leaves about 236 frost-free days (median of 2016–2025). Tomato seedlings can go into open ground from 24 April to 3 August.

Last spring frostaround 1 April
First autumn frostaround 23 November
Frost-free days236 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 Gwangju?

The last frost in Gwangju usually comes around 1 April: 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 11 March, while corn waits until 8 April. The first autumn frost follows around 23 November, about 236 days later: harvest or cover frost-tender crops before then.

When to sow and plant

CropSow for seedlingsPlant out in a greenhouseOpen ground
Achocha6 February – 15 August18 March – 24 September8 April – 24 September
Ageratumfrom 6 February—from 24 April
Arugula——sow 11 March – 19 October
Basil19 March – 21 September26 April – 29 October17 May – 29 October
Beet——sow 11 March – 24 September
Bell Pepper25 February – 4 June26 April – 3 August17 May – 3 August
Black-eyed Susanfrom 15 January—from 8 April
Bok Choy11 February – 2 October18 March – 6 November8 April – 6 November
Borage——sow 8 April – 29 September
Broad bean——sow 11 March – 15 August
Broccoli——sow 11 March – 8 August
Brussels Sprouts4 January – 6 July18 February – 20 August11 March – 20 August
Busy Lizziefrom 14 January—from 8 April
Cabbage——sow 11 March – 16 July
Calendula——sow from 11 March
Carrot——sow 11 March – 31 August
Cauliflower7 January – 8 August18 February – 19 September11 March – 19 September
Celeriac31 December – 5 June18 March – 21 August8 April – 21 August
Celery31 December – 15 June18 March – 31 August8 April – 31 August
Celosiafrom 27 Februaryfrom 13 Aprilfrom 4 May
Chamomile——sow 11 March – 19 September
Chayote20 December – 29 May18 March – 25 August8 April – 25 August
Chickpea——sow 11 March – 5 August
Chicory24 January – 30 August—11 March – 24 September
Chili Pepper25 February – 11 July26 April – 9 September17 May – 9 September
China asterfrom 5 Marchfrom 26 Aprilfrom 17 May
Chives——sow 11 March – 10 September
Cilantro——sow 11 March – 20 September
Corn——sow 8 April – 5 August
Corn poppy——sow from 11 March
Cosmosfrom 27 Februaryfrom 13 Aprilfrom 4 May
Cucumber29 March – 11 August26 April – 8 September17 May – 8 September
Daikon——sow 11 March – 17 September
Delphiniumfrom 21 December—from 11 March
Dill——sow 11 March – 30 September
Edging lobeliafrom 14 January—from 8 April
Eggplant25 February – 4 June26 April – 3 August17 May – 3 August
Florence fennel1 February – 15 August18 March – 29 September8 April – 29 September
Foxglovefrom 3 December—from 11 March
Garden sorrel——sow 11 March – 18 September
Green Beans——sow 4 May – 13 August
Hollyhock——sow from 11 March
Hyssop——sow 11 March – 11 August
Kale——sow 11 March – 12 September
Kiwano2 March – 18 August3 April – 19 September24 April – 19 September
Kohlrabi——sow 11 March – 22 September
Leek10 December – 27 May18 February – 5 August11 March – 5 August
Lemon balm——sow 11 March – 14 September
Lettuce——sow 11 March – 27 September
Lisianthusfrom 23 Novemberfrom 18 Februaryfrom 11 March
Lovage——sow from 11 March
Luffa15 March – 12 June26 April – 24 July17 May – 24 July
Marigoldfrom 4 Februaryfrom 18 Marchfrom 8 April
Marjoram25 February – 30 August—17 May – 29 October
Melon29 March – 29 July26 April – 26 August17 May – 26 August
Microgreens——sow 4 May – 9 November
Moringa13 March – 4 September7 May – 29 October28 May – 29 October
Moss rosefrom 21 January—from 8 April
Mustard greens——sow 11 March – 9 October
Napa cabbage13 February – 9 September18 March – 12 October8 April – 12 October
Nasturtiumfrom 8 Februaryfrom 18 Marchfrom 8 April
Okra15 March – 23 August26 April – 4 October17 May – 4 October
Oregano20 December – 20 August18 February – 19 October11 March – 19 October
Pansyfrom 24 Decemberfrom 18 Februaryfrom 11 March
Parsley——sow 11 March – 8 September
Parsnip——sow 11 March – 28 July
Peanut20 March – 19 July26 April – 25 August17 May – 25 August
Peas——sow 11 March – 10 September
Petuniafrom 22 Februaryfrom 26 Aprilfrom 17 May
Physalis17 February – 16 July3 April – 30 August24 April – 30 August
Pumpkin15 March – 17 June26 April – 29 July17 May – 29 July
Purple coneflowerfrom 18 December—from 11 March
Radish——sow 11 March – 24 October
Sage31 December – 16 August18 February – 4 October11 March – 4 October
Scarlet sagefrom 10 February—from 24 April
Snapdragonfrom 15 Decemberfrom 18 Februaryfrom 11 March
Soybean——sow 17 May – 4 September
Spinach——sow 11 March – 29 September
Stevia13 February – 7 July3 April – 25 August24 April – 25 August
Stock——sow from 11 March
Sunflower——sow from 4 May
Sweet alyssum——sow from 11 March
Sweet Corn27 February – 30 August21 March – 21 September11 April – 21 September
Sweet peafrom 7 Januaryfrom 18 Februaryfrom 11 March
Sweet William——sow from 11 March
Swiss Chard——sow 11 March – 24 September
Thyme——sow 11 March – 5 August
Tomato10 February – 12 June3 April – 3 August24 April – 3 August
Turnip——sow 11 March – 26 September
Watercress——sow 11 March – 7 October
Watermelon29 March – 17 July26 April – 14 August17 May – 14 August
Zinniafrom 2 Aprilfrom 7 Mayfrom 28 May
Zucchini5 April – 16 August26 April – 6 September17 May – 6 September

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 Gwangju

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 before the last spring frost and 15 °C 23 days after it.

SoilDateAgainst the last spring frost
5 °C2 March30 days earlier
10 °C28 March4 days earlier
15 °C24 April23 days later
18 °C17 May46 days later

Frost dates near Gwangju

Of the nearest cities on our list, the last spring frost ends earliest in Jeju City (18 February) and latest in Daejeon (1 April).

CityDistanceLast spring frostFirst autumn frost
Jeonju77 km27 March17 November
Daejeon140 km1 April12 November
Daegu176 km19 March21 November
Jeju City187 km18 February19 December
Busan202 km19 March22 November

Seeds, seedlings and markets in Gwangju

Within 15 km of Gwangju OpenStreetMap lists 1 garden centre, 14 markets and 1 farm shop (collected 28 October 2026). The nearest market to the city centre is Yangdong market, 5 km away.

Places: © OpenStreetMap contributors, ODbL.

What to grow at home in winter in Gwangju

Frosts in Gwangju usually come from about 23 November to about 1 April. 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 Gwangju by month

Average weather in Gwangju over 2016–2025: the warmest month is August. Months that average 20 °C or more by day: May–October (20.1–30.4 °C). Months that average 30 °C or more by day: August (30.4 °C). Nights average below 0 °C in January (-3.3 °C), February (-2.1 °C) and December (-1.7 °C). About 1398 mm of rain falls in a year, on 112 days; July is the wettest month (287 mm) and December the driest (35 mm).

MonthDay, °CNight, °CRain, mmRainy days
January4.9-3.3376
February6.9-2.1426
March13.32.1657
April18.87.4998
May23.312.21189
June27.217.817612
July29.422.528718
August30.42321716
September26.318.517812
October20.111.3947
November13.94.4505
December6.7-1.7356

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 24 October
Crocus24 October – end of December
Daffodil24 October – end of December
Garlic24 October – end of December
Grape hyacinthby 24 October
Helleboreby 24 October
Hyacinth24 October – end of December
Lilyby 24 October
Ornamental onionby 24 October
Peonyby 24 October
Saffronby 24 October
Snowdropby 24 October
Tulip24 October – end of December
Wild garlicby 24 October

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).