When to plant eggplants in Sapporo: 17 July – 8 August

In Sapporo, eggplant: sow for seedlings from 27 April to 9 June; plant into a greenhouse from 26 June to 8 August; plant out into open ground from 17 July to 8 August.

Eggplant 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 eggplant 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 70 days to the first harvest leave 22 for picking, so a start 3 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
Into an unheated greenhouse	26 June – 8 August; June outside: 9.6 °C at night, 17.8 °C by day; card 21–29 °C
First autumn frost	17 October, 92 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	25 September – 17 October
Days left for picking	22
Daylight	14:45 on 18 May, 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, Zucchini, Pumpkin and Watermelon.

Eggplant in Sapporo: care after planting

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

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

17 July — feed: balanced (NPK)
14 August — feed: nitrogen

Pests and diseases of eggplant 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 Sapporo during the eggplant season

No month of the season averages above the eggplant card's 21–29 °C by day; the warmest, July, averages 22.3 °C. Months that stay below 21 °C even by day on average: September (18.1 °C) and October (10.9 °C). Nights average below 21 °C in every month of the season, from 3.3 °C to 15.2 °C.

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

Eggplant in nearby cities

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

City	Distance	Date	Difference
Sendai	534 km	7 June – 3 August	40 days earlier
Niigata	604 km	20 May – 30 August	58 days earlier
Vladivostok	768 km	6 July – 16 July	11 days earlier
Khabarovsk	774 km	15 June – 26 June	32 days earlier
Tokyo	832 km	28 April – 24 August	80 days earlier
Nagoya	956 km	6 May – 20 August	72 days earlier

Where to buy eggplant plants and seeds near Sapporo

Buy plants ready to set out from 17 July to 8 August (from 26 June to 8 August for an unheated greenhouse); seed for raising your own is sown from 27 April to 9 June. Within 15 km of Sapporo OpenStreetMap lists 2 garden centres, 1 farm-supply shop, 2 markets and 3 farm shops (collected 28 October 2026).

雪印種苗園芸センター — farm supply
11 km
Sapporo Central Wholesale Market — market
3 km · sapporo-market.gr.jp
八紘学園農産物直売所 — farm shop
6 km · hakkougakuentyokub.wixsite.com
はるきちオーガニックファーム直売所 — farm shop
13 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