When to plant pumpkins in Ulsan: 18 May – 22 July

In Ulsan, pumpkin: sow for seedlings from 16 March to 10 June; plant into a greenhouse from 27 April to 22 July; plant out into open ground from 18 May to 22 July. For plants and seeds, the places nearby include 조운어바웃플랜츠 (garden centre, 12 km); addresses and opening hours are below.

Pumpkin in Ulsan: soil, season and weather

In Ulsan the soil, not frost, sets the date: the last frost is over around 22 March, but the top 7 cm of soil reaches 18 °C — the minimum on the pumpkin card — only around 18 May, 57 days later.

Last spring frost	22 March
Top 7 cm of soil at 18 °C	18 May, 57 days after the last frost
First autumn frost	16 November, 182 days after the start
Days in the bed to the first harvest (card)	75
First harvest, if planted in this window	1 August – 5 October
Days left for picking	107
Daylight	12:45 on 6 April, 14:06 on 18 May
Watering outdoors when fruiting (card)	every 5 days; the driest month, November, has 4 rainy days

The same dates in Ulsan hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Watermelon.

Pumpkin in Ulsan: care after planting

Planted on 18 May: in the first weeks water every 4 days.

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

8 June — feed: nitrogen

Pests and diseases of pumpkin 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 Ulsan during the pumpkin season

About 1199 mm of rain falls in the season; November is the driest month (37 mm) and September the wettest (268 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	22.6	12.5	112	9	14:02
June	25.9	17.4	180	11	14:33
July	28.9	22.3	266	16	14:21
August	29.7	22.9	216	16	13:32
September	25	18.6	268	16	12:26
October	20	11.8	120	9	11:20
November	14.7	4.3	37	4	10:19

ERA5 2016–2025, Open-Meteo

Pumpkin in nearby cities

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

City	Distance	Date	Difference
Busan	47 km	15 May – 28 July	3 days earlier
Daegu	74 km	16 May – 27 July	2 days earlier
Daejeon	195 km	17 May – 18 July	1 day earlier
Jeonju	198 km	19 May – 23 July	1 day later
Gwangju	228 km	17 May – 29 July	1 day earlier
Kitakyushu	234 km	from 15 May	3 days earlier

Where to buy pumpkin plants and seeds near Ulsan

Buy plants ready to set out from 18 May to 22 July (from 27 April to 22 July for an unheated greenhouse); seed for raising your own is sown from 16 March to 10 June. Within 15 km of Ulsan OpenStreetMap lists 1 garden centre, 8 markets and 1 farm shop (collected 28 October 2026).

조운어바웃플랜츠 — garden centre
서진3길 22, 44109 울산광역시 · 12 km
전하시장 — market
녹수1길(Noksu 1-gil) 6, 울산광역시 · 11 km
월봉시장(Wolbong Market) — market
화정6길 16, 울산광역시 · 11 km
Ulsannongsusanmul Wholesale Market — market
2 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