When to plant eggplants in Olsztyn: 9 June – 27 July

In Olsztyn, eggplant: sow for seedlings from 20 March to 28 May; plant into a greenhouse from 19 May to 27 July; plant out into open ground from 9 June to 27 July. For plants and seeds, the places nearby include Szkółka Roślin "Topa" (plant nursery, 5 km); addresses and opening hours are below.

Eggplant in Olsztyn: soil, season and weather

In Olsztyn the soil, not frost, sets the date: the last frost is over around 28 April, but the top 7 cm of soil reaches 18 °C — the minimum on the eggplant card — only around 9 June, 42 days later.

Last spring frost	28 April
Top 7 cm of soil at 18 °C	9 June, 42 days after the last frost
Into an unheated greenhouse	19 May – 27 July; May outside: 7.2 °C at night, 17.7 °C by day; card 21–29 °C
First autumn frost	16 November, 160 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	18 August – 5 October
Days left for picking	90
Daylight	13:38 on 10 April, 16:57 on 9 June
Watering outdoors when fruiting (card)	every 3 days; the driest month, November, has 10 rainy days

The same dates in Olsztyn hold for Cucumber, Bell Pepper, Zucchini, Pumpkin and Watermelon.

Eggplant in Olsztyn: care after planting

Planted on 9 June: in the first weeks water every 4 days.

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

9 June — feed: balanced (NPK)
7 July — 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 Olsztyn during the eggplant season

No month of the season averages above the eggplant card's 21–29 °C by day; the warmest, August, averages 23.4 °C. Months that stay below 21 °C even by day on average: September (19.2 °C), October (12.7 °C) and November (6.2 °C). Nights average below 21 °C in every month of the season, from 1.9 °C to 13.9 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	22.8	12.5	64	11	17:04
July	22.9	13.9	97	16	16:36
August	23.4	13.9	68	11	14:53
September	19.2	10.6	54	10	12:46
October	12.7	6	64	13	10:39
November	6.2	1.9	43	10	8:37

ERA5 2016–2025, Open-Meteo

Eggplant in nearby cities

Around Olsztyn, Toruń is 6 days earlier and Gdańsk 6 days later.

City	Distance	Date	Difference
Kaliningrad	103 km	14 June – 25 July	5 days later
Gdańsk	135 km	15 June – 30 July	6 days later
Toruń	151 km	3 June – 23 July	6 days earlier
Gdynia	151 km	7 June – 30 July	2 days earlier
Warsaw	176 km	6 June – 28 July	3 days earlier
Bydgoszcz	179 km	6 June – 23 July	3 days earlier

Where to buy eggplant plants and seeds near Olsztyn

Buy plants ready to set out from 9 June to 27 July (from 19 May to 27 July for an unheated greenhouse); seed for raising your own is sown from 20 March to 28 May. Within 15 km of Olsztyn OpenStreetMap lists 2 garden centres, 1 plant nursery, 5 markets and 2 farm shops (collected 28 October 2026).

Szkółka Roślin "Topa" — plant nursery
Sielska 45, 10-041 Olsztyn · 5 km · szkolkatopa.olsztyn.pl
Targowisko przy ul. Grunwaldzkiej — market
Tue, Fri, Sat 06:00–14:00 · 1 km · zdzit.olsztyn.eu
Pchli targ "Flumark" — market
Aleja Sybiraków, Olsztyn · Sun 9:00–15:00 · 2 km
Targowisko przy ul. Żurawskiego — market
Mon–Sat 06:00–16:00 · 5 km · zdzit.olsztyn.eu

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.

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