When to plant tomatoes in Gwangju: 24 April – 3 August

In Gwangju, tomato: sow for seedlings from 10 February to 12 June; plant into a greenhouse from 3 April to 3 August; plant out into open ground from 24 April to 3 August.

Tomato in Gwangju: soil, season and weather

In Gwangju the soil, not frost, sets the date: the last frost is over around 1 April, but the top 7 cm of soil reaches 15 °C — the minimum on the tomato card — only around 24 April, 23 days later.

Last spring frost	1 April
Top 7 cm of soil at 15 °C	24 April, 23 days after the last frost
Into an unheated greenhouse	3 April – 3 August; April outside: 7.4 °C at night, 18.8 °C by day; card 16–27 °C
First autumn frost	23 November, 213 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	3 July – 12 October
Days left for picking	143
Daylight	11:29 on 3 March, 13:22 on 24 April
Watering outdoors when fruiting (card)	every 3 days; the driest month, November, has 5 rainy days

Tomato in Gwangju: care after planting

Planted on 24 April: in the first weeks water every 4 days.

Feeding, by the card’s schedule from that day:

24 April — feed: balanced (NPK)
22 May — feed: nitrogen

Pests and diseases of tomato to watch for:

Dates count from the first planting day of the window above; a later planting moves them by as many days.

Weather in Gwangju during the tomato season

Days average above the tomato card's 16–27 °C in June (27.2 °C), July (29.4 °C) and August (30.4 °C). Months that stay below 16 °C even by day on average: November (13.9 °C). Nights average below 16 °C in April, May and October, November (4.4–12.2 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
April	18.8	7.4	99	8	13:03
May	23.3	12.2	118	9	14:00
June	27.2	17.8	176	12	14:31
July	29.4	22.5	287	18	14:19
August	30.4	23	217	16	13:30
September	26.3	18.5	178	12	12:26
October	20.1	11.3	94	7	11:20
November	13.9	4.4	50	5	10:20

ERA5 2016–2025, Open-Meteo

Tomato in nearby cities

Around Gwangju, Jeju City is 13 days earlier and Jeonju 1 day later.

City	Distance	Date	Difference
Jeonju	77 km	25 April – 28 July	1 day later
Daejeon	140 km	24 April – 23 July	same day
Daegu	176 km	22 April – 1 August	2 days earlier
Jeju City	187 km	11 April – 29 August	13 days earlier
Busan	202 km	21 April – 2 August	3 days earlier
Ulsan	228 km	22 April – 27 July	2 days earlier

Where to buy tomato plants and seeds near Gwangju

Buy plants ready to set out from 24 April to 3 August (from 3 April to 3 August for an unheated greenhouse); seed for raising your own is sown from 10 February to 12 June. Within 15 km of Gwangju OpenStreetMap lists 1 garden centre, 14 markets and 1 farm shop (collected 28 October 2026).

Dongbu Market — market
중문로9번길 39, 61190 · 6 km
Namgwangju Sunrise Market — market
제봉로17번길 13-6, 61490 · 7 km
Hwangnyong Market — market
삼월길 5, 장성군 · 15 km
Yangdong market — market
천변좌로 243 · 5 km

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.

Questions