When to plant tomatoes in Bydgoszcz: 12 May – 23 July

In Bydgoszcz, tomato: sow for seedlings from 28 February to 1 June; plant into a greenhouse from 21 April to 23 July; plant out into open ground from 12 May to 23 July. For plants and seeds, the places nearby include Szkółka Krzewów Ozdobnych (garden centre, 3 km) and Kwiaciarnia i Ogrodnictwo Zalewscy (garden centre, 5 km); addresses and opening hours are below.

Tomato 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 15 °C — the minimum on the tomato card — only around 12 May, 22 days later.

Last spring frost	20 April
Top 7 cm of soil at 15 °C	12 May, 22 days after the last frost
Into an unheated greenhouse	21 April – 23 July; April outside: 3.9 °C at night, 14.1 °C by day; card 16–27 °C
First autumn frost	12 November, 184 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	21 July – 1 October
Days left for picking	114
Daylight	12:13 on 21 March, 15:39 on 12 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, November, has 9 rainy days

Tomato in Bydgoszcz: care after planting

Planted on 12 May: in the first weeks water every 4 days.

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

12 May — feed: balanced (NPK)
9 June — feed: nitrogen

Pests and diseases of tomato 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 tomato season

No month of the season averages above the tomato card's 16–27 °C by day; the warmest, August, averages 24.4 °C. Months that stay below 16 °C even by day on average: October (13.9 °C) and November (7.3 °C). Nights average below 16 °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
May	18.9	8.3	58	11	15:49
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

Tomato in nearby cities

Around Bydgoszcz, Toruń is 1 day earlier and Gdańsk 12 days later.

City	Distance	Date	Difference
Toruń	41 km	11 May – 23 July	1 day earlier
Poznań	107 km	11 May – 27 July	1 day earlier
Gdańsk	143 km	24 May – 30 July	12 days later
Gdynia	159 km	15 May – 30 July	3 days later
Olsztyn	179 km	22 May – 27 July	10 days later
Łódź	180 km	15 May – 15 July	3 days later

Where to buy tomato plants and seeds near Bydgoszcz

Buy plants ready to set out from 12 May to 23 July (from 21 April to 23 July for an unheated greenhouse); seed for raising your own is sown from 28 February to 1 June. Within 15 km of Bydgoszcz OpenStreetMap lists 7 garden centres, 1 farm-supply shop, 2 plant nurseries and 9 markets (collected 28 October 2026).

Kwiaciarnia i Ogrodnictwo Zalewscy — garden centre
Nakielska 197, 85-360 Bydgoszcz · Mon–Fri 09:00–17:00; Sat 08:00–16:00 · 5 km · facebook.com
Szkółka Krzewów Ozdobnych — garden centre
Łęczycka, Bydgoszcz · 3 km · wojtekogrodnik.pl
Szkółka Krzewów Ozdobnych A.W.Uzdowscy — garden centre
Apr 01 -Oct 31 Mon–Fri 10:00–17:00; Sat 10:00–14:00 · 6 km · uzdowscy.pl
Zara — garden centre
Rekinowa 12/13, 85-435 Bydgoszcz · 8 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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