When to plant cucumbers in Fukuoka: 5 May – 6 October

In Fukuoka, cucumber: sow for seedlings from 17 March to 8 September; plant into a greenhouse from 14 April to 6 October; plant out into open ground from 5 May to 6 October.

Cucumber in Fukuoka: soil, season and weather

In Fukuoka the soil, not frost, sets the date: the last frost is over around 25 February, but the top 7 cm of soil reaches 18 °C — the minimum on the cucumber card — only around 5 May, 69 days later.

Last spring frost	25 February
Top 7 cm of soil at 18 °C	5 May, 69 days after the last frost
Into an unheated greenhouse	14 April – 6 October; April outside: 10.7 °C at night, 19.7 °C by day; card 18–25 °C
First autumn frost	21 December, 230 days after the start
Days in the bed to the first harvest (card)	34
First harvest, if planted in this window	8 June – 9 November
Days left for picking	196
Daylight	12:44 on 7 April, 13:37 on 5 May
Watering outdoors when fruiting (card)	every 2 days; the driest month, December, has 8 rainy days

The same dates in Fukuoka hold for Bell Pepper, Eggplant, Zucchini, Pumpkin and Watermelon.

Cucumber in Fukuoka: care after planting

Planted on 5 May: in the first weeks water every 4 days.

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

12 May — feed: nitrogen

Pests and diseases of cucumber 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 Fukuoka during the cucumber season

No month of the season averages above the cucumber card's 18–35 °C by day; the warmest, August, averages 32.3 °C. Months that stay below 18 °C even by day on average: November (17.5 °C) and December (11.2 °C). Nights average below 18 °C in May and October–December (4.2–15.4 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	24	15.1	185	12	13:53
June	27.1	19.6	266	17	14:22
July	30.7	23.8	304	19	14:11
August	32.3	24.6	253	16	13:25
September	28.5	21.4	229	17	12:25
October	23	15.4	104	10	11:23
November	17.5	9.3	76	7	10:26
December	11.2	4.2	60	8	9:56

ERA5 2016–2025, Open-Meteo

Cucumber in nearby cities

Around Fukuoka, Kumamoto is 3 days earlier and Hiroshima 21 days later.

City	Distance	Date	Difference
Kitakyushu	55 km	from 15 May	10 days later
Kumamoto	92 km	2 May – 18 September	3 days earlier
Hiroshima	209 km	26 May – 10 September	21 days later
Busan	215 km	15 May – 7 September	10 days later
Kagoshima	222 km	6 May – 11 October	1 day later
Ulsan	239 km	18 May – 1 September	13 days later

Where to buy cucumber plants and seeds near Fukuoka

Buy plants ready to set out from 5 May to 6 October (from 14 April to 6 October for an unheated greenhouse); seed for raising your own is sown from 17 March to 8 September. Within 15 km of Fukuoka OpenStreetMap lists 10 garden centres, 1 plant nursery, 3 markets and 3 farm shops (collected 28 October 2026).

エンゲイ村 — garden centre
4 km
田中種苗園 — garden centre
4 km
フラワーシアター — garden centre
4 km
ふくおかフラワー — garden centre
7 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