When to plant zucchini in Jeonju: 19 May – 31 August

In Jeonju, zucchini: sow for seedlings from 7 April to 10 August; plant into a greenhouse from 28 April to 31 August; plant out into open ground from 19 May to 31 August.

Zucchini in Jeonju: soil, season and weather

In Jeonju the soil, not frost, sets the date: the last frost is over around 27 March, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 19 May, 53 days later.

Last spring frost	27 March
Top 7 cm of soil at 18 °C	19 May, 53 days after the last frost
First autumn frost	17 November, 182 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	24 June – 6 October
Days left for picking	146
Daylight	13:32 on 28 April, 14:09 on 19 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, November, has 7 rainy days

The same dates in Jeonju hold for Cucumber, Bell Pepper, Eggplant, Pumpkin and Watermelon.

Zucchini in Jeonju: care after planting

Planted on 19 May: in the first weeks water every 4 days.

Pests and diseases of zucchini to watch for:

Weather in Jeonju during the zucchini season

About 1073 mm of rain falls in the season; November is the driest month (55 mm) and July the wettest (267 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	22.3	12	106	10	14:03
June	26.3	17.1	150	13	14:34
July	28.7	21.7	267	19	14:22
August	29.5	22.1	232	18	13:32
September	25.4	17.6	178	12	12:26
October	19	10.4	85	8	11:19
November	12.3	3.5	55	7	10:18

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

All the nearest cities on our list plant zucchini earlier than Jeonju; the closest date is in Ulsan, 1 day earlier.

City	Distance	Date	Difference
Daejeon	63 km	17 May – 26 August	2 days earlier
Gwangju	77 km	17 May – 6 September	2 days earlier
Daegu	131 km	16 May – 4 September	3 days earlier
Busan	188 km	15 May – 5 September	4 days earlier
Seoul	194 km	15 May – 20 August	4 days earlier
Ulsan	198 km	18 May – 30 August	1 day earlier

Where to buy zucchini plants and seeds near Jeonju

Buy plants ready to set out from 19 May to 31 August (from 28 April to 31 August for an unheated greenhouse); seed for raising your own is sown from 7 April to 10 August. Within 15 km of Jeonju OpenStreetMap lists 7 markets (collected 28 October 2026).

농수산시장 — market
6 km
Samnye Traditional Market — market
12 km
봉동생강골시장 — market
13 km
서신동 시장 — market
3 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