When to plant zucchini in Busan: 15 May – 5 September

In Busan, zucchini: sow for seedlings from 3 April to 15 August; plant into a greenhouse from 24 April to 5 September; plant out into open ground from 15 May to 5 September.

Zucchini in Busan: soil, season and weather

In Busan 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 zucchini card — only around 15 May, 57 days later.

Last spring frost	19 March
Top 7 cm of soil at 18 °C	15 May, 57 days after the last frost
First autumn frost	22 November, 191 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	20 June – 11 October
Days left for picking	155
Daylight	13:22 on 24 April, 14:00 on 15 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, November, has 4 rainy days

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

Zucchini in Busan: care after planting

Planted on 15 May: in the first weeks water every 4 days.

Pests and diseases of zucchini to watch for:

Weather in Busan during the zucchini season

About 1220 mm of rain falls in the season; November is the driest month (42 mm) and July the wettest (272 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	23.4	13.4	127	9	14:00
June	26.8	18.3	197	11	14:31
July	29.6	23	272	17	14:19
August	30.6	23.7	226	17	13:30
September	26.3	19.4	257	14	12:26
October	21.3	12.3	99	8	11:20
November	15.4	5.1	42	4	10:20

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

Around Busan, Fukuoka is 10 days earlier and Jeonju 4 days later.

City	Distance	Date	Difference
Ulsan	47 km	18 May – 30 August	3 days later
Daegu	88 km	16 May – 4 September	1 day later
Jeonju	188 km	19 May – 31 August	4 days later
Daejeon	200 km	17 May – 26 August	2 days later
Gwangju	202 km	17 May – 6 September	2 days later
Fukuoka	215 km	5 May – 4 October	10 days earlier

Where to buy zucchini plants and seeds near Busan

Buy plants ready to set out from 15 May to 5 September (from 24 April to 5 September for an unheated greenhouse); seed for raising your own is sown from 3 April to 15 August. Within 15 km of Busan OpenStreetMap lists 27 markets (collected 28 October 2026).

Bujeon market — market
중앙대로783번길 23, 47251 부산광역시 · 2 km
Gukje Market — market
국제시장2길 55 · Mon–Sun 09:00–18:00 · 10 km
Gaya Computer Wholesale Marketplace — market
Mon–Sat 09:30–19:00; Sun 11:00–18:30 · 7 km
Haeundae Traditional Market — market
Mon–Sun 09:00–22:00 · 9 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