When to plant cucumbers in Bydgoszcz: 6 June – 28 August

In Bydgoszcz, cucumber: sow for seedlings from 18 April to 31 July; plant into a greenhouse from 16 May to 28 August; plant out into open ground from 6 June to 28 August. For plants and seeds, the places nearby include GRENE (farm supply, 4 km) and Avocado (garden centre, 15 km); addresses and opening hours are below.

Cucumber in Bydgoszcz: soil, season and weather

In Bydgoszcz the soil, not frost, sets the date: the last frost is over around 20 April, but the top 7 cm of soil reaches 18 °C — the minimum on the cucumber card — only around 6 June, 47 days later.

Last spring frost	20 April
Top 7 cm of soil at 18 °C	6 June, 47 days after the last frost
Into an unheated greenhouse	16 May – 28 August; May outside: 8.3 °C at night, 18.9 °C by day; card 18–25 °C
First autumn frost	12 November, 159 days after the start
Days in the bed to the first harvest (card)	34
First harvest, if planted in this window	10 July – 1 October
Days left for picking	125
Daylight	15:29 on 9 May, 16:45 on 6 June
Watering outdoors when fruiting (card)	every 2 days; the driest month, November, has 9 rainy days

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

Cucumber in Bydgoszcz: care after planting

Planted on 6 June: in the first weeks water every 4 days.

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

13 June — 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 Bydgoszcz during the cucumber season

No month of the season averages above the cucumber card's 18–35 °C by day; the warmest, August, averages 24.4 °C. Months that stay below 18 °C even by day on average: October (13.9 °C) and November (7.3 °C). Nights average below 18 °C in every month of the season, from 2.4 °C to 14.6 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	24	13.4	70	10	16:55
July	24	14.5	94	13	16:29
August	24.4	14.6	64	9	14:49
September	20.1	11.4	51	8	12:45
October	13.9	7	58	11	10:41
November	7.3	2.4	40	9	8:42

ERA5 2016–2025, Open-Meteo

Cucumber in nearby cities

Around Bydgoszcz, Toruń is 3 days earlier and Gdańsk 9 days later.

City	Distance	Date	Difference
Toruń	41 km	3 June – 28 August	3 days earlier
Poznań	107 km	6 June – 1 September	same day
Gdańsk	143 km	15 June – 4 September	9 days later
Gdynia	159 km	7 June – 4 September	1 day later
Olsztyn	179 km	9 June – 1 September	3 days later
Łódź	180 km	6 June – 20 August	same day

Where to buy cucumber plants and seeds near Bydgoszcz

Buy plants ready to set out from 6 June to 28 August (from 16 May to 28 August for an unheated greenhouse); seed for raising your own is sown from 18 April to 31 July. Within 15 km of Bydgoszcz OpenStreetMap lists 7 garden centres, 1 farm-supply shop, 2 plant nurseries and 9 markets (collected 28 October 2026).

Avocado — garden centre
Wiejska 1, 86-050 Solec Kujawski · 15 km
GRENE — farm supply
Towarowa 36, 85-746 Bydgoszcz · 4 km · grene.pl
Centrum Ogrodnicze Rolpest — garden centre
10 km · rolpest.pl
Ogrodnictwo Juszczak — garden centre
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.

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