When to plant watermelons in Daegu: 16 May – 12 August

In Daegu, watermelon: sow for seedlings from 28 March to 15 July; plant into a greenhouse from 25 April to 12 August; plant out into open ground from 16 May to 12 August.

Watermelon in Daegu: soil, season and weather

In Daegu the soil, not frost, sets the date: the last frost is over around 19 March, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 16 May, 58 days later.

Last spring frost	19 March
Top 7 cm of soil at 18 °C	16 May, 58 days after the last frost
Into an unheated greenhouse	25 April – 12 August; April outside: 9.1 °C at night, 19.4 °C by day; card 18–35 °C
First autumn frost	21 November, 189 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	14 July – 10 October
Days left for picking	130
Daylight	13:11 on 18 April, 14:05 on 16 May
Watering outdoors when fruiting (card)	every 5 days; the driest month, November, has 3 rainy days

The same dates in Daegu hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Pumpkin.

Watermelon in Daegu: care after planting

Planted on 16 May: in the first weeks water every 5 days.

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

16 May — feed: balanced (NPK)

Pests and diseases of watermelon 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 Daegu during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, August, averages 31 °C. Months that stay below 18 °C even by day on average: November (13.8 °C). Nights average below 18 °C in May (13.9 °C), October (11.9 °C) and November (4.9 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	24.4	13.9	94	8	14:03
June	28.4	18.7	155	11	14:35
July	30.2	22.8	227	17	14:22
August	31	23.4	195	17	13:33
September	25.8	18.7	197	14	12:26
October	19.9	11.9	92	8	11:19
November	13.8	4.9	35	3	10:17

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Daegu, Busan is 1 day earlier and Jeonju 3 days later.

City	Distance	Date	Difference
Ulsan	74 km	18 May – 7 August	2 days later
Busan	88 km	15 May – 13 August	1 day earlier
Daejeon	121 km	17 May – 3 August	1 day later
Jeonju	131 km	19 May – 8 August	3 days later
Gwangju	176 km	17 May – 14 August	1 day later
Gangneung	211 km	17 May – 12 August	1 day later

Where to buy watermelon plants and seeds near Daegu

Buy plants ready to set out from 16 May to 12 August (from 25 April to 12 August for an unheated greenhouse); seed for raising your own is sown from 28 March to 15 July. Within 15 km of Daegu OpenStreetMap lists 1 garden centre and 32 markets (collected 28 October 2026).

농협 대구공판장 — market
3 km
구평리시장 — market
3 km
복현시장 — market
3 km
동서시장 — market
4 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