Greenly Garden
Get the app
EN

Last and first frost dates in Bydgoszcz

Poland

In Bydgoszcz the last spring frost usually comes around 20 April and the first autumn frost around 12 November, which leaves about 206 frost-free days (median of 2016–2025). Tomato seedlings can go into open ground from 12 May to 23 July.

Last spring frostaround 20 April
First autumn frostaround 12 November
Frost-free days206 days

Median of 2016–2025 for the 25 km grid cell of the city: the last day at or below 0 °C in spring and the first in autumn (ERA5 reanalysis via Open-Meteo). In a cold year a frost can come a week or two later — Greenly warns 48 hours ahead.

When is the last frost in Bydgoszcz?

The last frost in Bydgoszcz usually comes around 20 April: that is the median of 2016–2025, so in about half of those years the last night at or below 0 °C came later. Hardy crops start before it and frost-tender ones only after it: in the table below arugula can go into open ground from 30 March, while corn waits until 2 May. The first autumn frost follows around 12 November, about 206 days later: harvest or cover frost-tender crops before then.

When to sow and plant

CropSow for seedlingsPlant out in a greenhouseOpen ground
Achocha25 February – 4 August6 April – 13 September27 April – 13 September
Ageratumfrom 24 February—from 12 May
Arugula——sow 30 March – 8 October
Basil8 April – 10 September16 May – 18 October6 June – 18 October
Beet——sow 30 March – 13 September
Bell Pepper17 March – 24 May16 May – 23 July6 June – 23 July
Black-eyed Susanfrom 3 February—from 27 April
Bok Choy2 March – 21 September6 April – 26 October27 April – 26 October
Borage——sow 27 April – 18 September
Broad bean——sow 30 March – 4 August
Broccoli——sow 30 March – 28 July
Brussels Sprouts23 January – 25 June9 March – 9 August30 March – 9 August
Busy Lizziefrom 2 February—from 27 April
Cabbage——sow 30 March – 5 July
Calendula——sow from 30 March
Carrot——sow 30 March – 20 August
Cauliflower26 January – 28 July9 March – 8 September30 March – 8 September
Celeriac19 January – 25 May6 April – 10 August27 April – 10 August
Celery19 January – 4 June6 April – 20 August27 April – 20 August
Celosiafrom 15 Marchfrom 29 Aprilfrom 20 May
Chamomile——sow 30 March – 8 September
Chayote13 January – 18 May11 April – 14 August2 May – 14 August
Chickpea——sow 30 March – 25 July
Chicory12 February – 19 August—30 March – 13 September
Chili Pepper17 March – 30 June16 May – 29 August6 June – 29 August
China asterfrom 25 Marchfrom 16 Mayfrom 6 June
Chives——sow 30 March – 30 August
Cilantro——sow 30 March – 9 September
Corn——sow 2 May – 25 July
Corn poppy——sow from 30 March
Cosmosfrom 15 Marchfrom 29 Aprilfrom 20 May
Cucumber18 April – 31 July16 May – 28 August6 June – 28 August
Daikon——sow 30 March – 6 September
Delphiniumfrom 9 January—from 30 March
Dill——sow 30 March – 19 September
Edging lobeliafrom 2 February—from 27 April
Eggplant17 March – 24 May16 May – 23 July6 June – 23 July
Florence fennel20 February – 4 August6 April – 18 September27 April – 18 September
Foxglovefrom 22 December—from 30 March
Garden sorrel——sow 30 March – 7 September
Green Beans——sow 20 May – 2 August
Hollyhock——sow from 30 March
Hyssop——sow 30 March – 31 July
Kale——sow 30 March – 1 September
Kiwano20 March – 7 August21 April – 8 September12 May – 8 September
Kohlrabi——sow 30 March – 11 September
Leek29 December – 16 May9 March – 25 July30 March – 25 July
Lemon balm——sow 30 March – 3 September
Lettuce——sow 30 March – 16 September
Lisianthusfrom 12 Decemberfrom 9 Marchfrom 30 March
Lovage——sow from 30 March
Luffa4 April – 1 June16 May – 13 July6 June – 13 July
Marigoldfrom 23 Februaryfrom 6 Aprilfrom 27 April
Marjoram17 March – 19 August—6 June – 18 October
Melon18 April – 18 July16 May – 15 August6 June – 15 August
Microgreens——sow 20 May – 29 October
Moringa26 March – 24 August20 May – 18 October10 June – 18 October
Moss rosefrom 9 February—from 27 April
Mustard greens——sow 30 March – 28 September
Napa cabbage4 March – 29 August6 April – 1 October27 April – 1 October
Nasturtiumfrom 27 Februaryfrom 6 Aprilfrom 27 April
Okra4 April – 12 August16 May – 23 September6 June – 23 September
Oregano8 January – 9 August9 March – 8 October30 March – 8 October
Pansyfrom 12 Januaryfrom 9 Marchfrom 30 March
Parsley——sow 30 March – 28 August
Parsnip——sow 30 March – 17 July
Peanut9 April – 8 July16 May – 14 August6 June – 14 August
Peas——sow 30 March – 30 August
Petuniafrom 14 Marchfrom 16 Mayfrom 6 June
Physalis7 March – 5 July21 April – 19 August12 May – 19 August
Pumpkin4 April – 6 June16 May – 18 July6 June – 18 July
Purple coneflowerfrom 6 January—from 30 March
Radish——sow 30 March – 13 October
Sage19 January – 5 August9 March – 23 September30 March – 23 September
Scarlet sagefrom 28 February—from 12 May
Snapdragonfrom 3 Januaryfrom 9 Marchfrom 30 March
Soybean——sow 6 June – 24 August
Spinach——sow 30 March – 18 September
Stevia3 March – 26 June21 April – 14 August12 May – 14 August
Stock——sow from 30 March
Sunflower——sow from 20 May
Sweet alyssum——sow from 30 March
Sweet Corn26 March – 19 August17 April – 10 September8 May – 10 September
Sweet peafrom 26 Januaryfrom 9 Marchfrom 30 March
Sweet William——sow from 30 March
Swiss Chard——sow 30 March – 13 September
Thyme——sow 30 March – 25 July
Tomato28 February – 1 June21 April – 23 July12 May – 23 July
Turnip——sow 30 March – 15 September
Watercress——sow 30 March – 26 September
Watermelon18 April – 6 July16 May – 3 August6 June – 3 August
Zinniafrom 15 Aprilfrom 20 Mayfrom 10 June
Zucchini25 April – 5 August16 May – 26 August6 June – 26 August

Planting out: a week after the last frost once the soil is warm enough for the crop; frost-hardy crops three weeks before it; an unheated greenhouse three weeks earlier. Seedlings are sown so they are ready on that day. 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.

When the soil warms up in Bydgoszcz

The day the top 7 cm of soil first averages each temperature over a week, median of 2016–2025 (ERA5 via Open-Meteo). The soil reaches 10 °C 8 days before the last spring frost and 15 °C 22 days after it.

SoilDateAgainst the last spring frost
5 °C6 March45 days earlier
10 °C12 April8 days earlier
15 °C12 May22 days later
18 °C6 June47 days later

Frost dates near Bydgoszcz

Of the nearest cities on our list, the last spring frost ends earliest in Konin (15 April) and latest in Grudziądz (27 April).

CityDistanceLast spring frostFirst autumn frost
Toruń41 km26 April12 November
Grudziądz63 km27 April16 November
Włocławek88 km26 April13 November
Konin101 km15 April17 November
Poznań107 km21 April16 November

Seeds, seedlings and markets in Bydgoszcz

Within 15 km of Bydgoszcz OpenStreetMap lists 7 garden centres, 1 farm-supply shop, 2 plant nurseries and 9 markets (collected 28 October 2026). The nearest garden centre to the city centre is Szkółka Krzewów Ozdobnych, 3 km away.

Places: © OpenStreetMap contributors, ODbL.

What to grow at home in winter in Bydgoszcz

Frosts in Bydgoszcz usually come from about 12 November to about 20 April. These plants have indoor care in their Greenly cards and are harvested quickly, so they can be sown on a windowsill in winter.

Weather in Bydgoszcz by month

Average weather in Bydgoszcz over 2016–2025: the warmest month is August. Months that average 20 °C or more by day: June–September (20.1–24.4 °C). Nights average below 0 °C in January (-1.9 °C), February (-1.4 °C) and December (-0.1 °C). About 643 mm of rain falls in a year, on 124 days; July is the wettest month (94 mm) and March the driest (35 mm).

MonthDay, °CNight, °CRain, mmRainy days
January2.8-1.94813
February4.9-1.44510
March8.90.4359
April14.13.93610
May18.98.35811
June2413.47010
July2414.59413
August24.414.6649
September20.111.4518
October13.975811
November7.32.4409
December4-0.14411

Average of the daily highs and lows, rain per month and days with at least 1 mm (ERA5 via Open-Meteo, the same grid cell as the frost dates).

Planted in autumn

CropWhen to plant
Bearded Irisby 13 October
Crocus13 October – end of December
Daffodil13 October – end of December
Garlic13 October – end of December
Grape hyacinthby 13 October
Helleboreby 13 October
Hyacinth13 October – end of December
Lilyby 13 October
Ornamental onionby 13 October
Peonyby 13 October
Saffronby 13 October
Snowdropby 13 October
Tulip13 October – end of December
Wild garlicby 13 October

From a month before the first autumn frost, so the roots grow before winter, to the late-planting limit on each crop’s page (about two weeks before the ground freezes, by ten years of weather).