When to plant zucchini in Sapporo: 17 July – 31 July

In Sapporo, zucchini: sow for seedlings from 5 June to 10 July; plant into a greenhouse from 26 June to 31 July; plant out into open ground from 17 July to 31 July. For plants and seeds, the places nearby include 萩野農園野菜直売所果菜園 (farm shop, 13 km); addresses and opening hours are below.

Zucchini in Sapporo: soil, season and weather

In Sapporo the soil, not frost, sets the date: the last frost is over around 9 May, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 17 July, 69 days later. 92 days separate planting out (17 July) from the first autumn frost (17 October); the card's 36 days to the first harvest leave 56 for picking, so a start 8 weeks late would still fit.

Last spring frost	9 May
Top 7 cm of soil at 18 °C	17 July, 69 days after the last frost
First autumn frost	17 October, 92 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	22 August – 5 September
Days left for picking	56
Daylight	15:22 on 26 June, 15:01 on 17 July
Watering outdoors when fruiting (card)	every 3 days; the driest month, October, has 14 rainy days

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

Zucchini in Sapporo: care after planting

Planted on 17 July: in the first weeks water every 4 days.

Pests and diseases of zucchini to watch for:

Weather in Sapporo during the zucchini season

About 610 mm of rain falls in the season; October is the driest month (120 mm) and August the wettest (200 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
July	22.3	14.8	151	16	15:04
August	22.1	15.2	200	17	13:59
September	18.1	10.6	139	13	12:33
October	10.9	3.3	120	14	11:06

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

All the nearest cities on our list plant zucchini earlier than Sapporo; the closest date is in Vladivostok, 11 days earlier.

City	Distance	Date	Difference
Sendai	534 km	7 June – 6 September	40 days earlier
Niigata	604 km	20 May – 3 October	58 days earlier
Vladivostok	768 km	6 July – 19 August	11 days earlier
Khabarovsk	774 km	15 June – 30 July	32 days earlier
Tokyo	832 km	28 April – 27 September	80 days earlier
Nagoya	956 km	6 May – 23 September	72 days earlier

Where to buy zucchini plants and seeds near Sapporo

Buy plants ready to set out from 17 July to 31 July (from 26 June to 31 July for an unheated greenhouse); seed for raising your own is sown from 5 June to 10 July. Within 15 km of Sapporo OpenStreetMap lists 2 garden centres, 1 farm-supply shop, 2 markets and 3 farm shops (collected 28 October 2026).

Nijo Market — market
Mon–Sun 07:00–18:00 · 1 km · nijomarket.com
萩野農園野菜直売所果菜園 — farm shop
09:00–19:00 · 13 km
Joyful AK — garden centre
9 km
ヤマグチガーデン — garden centre
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