When to plant watermelons in Łódź: 6 June – 26 July

In Łódź, watermelon: sow for seedlings from 18 April to 28 June; plant into a greenhouse from 16 May to 26 July; plant out into open ground from 6 June to 26 July.

Watermelon in Łódź: soil, season and weather

In Łódź the soil, not frost, sets the date: the last frost is over around 16 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 6 June, 51 days later.

Last spring frost	16 April
Top 7 cm of soil at 18 °C	6 June, 51 days after the last frost
Into an unheated greenhouse	16 May – 26 July; May outside: 8.1 °C at night, 18.3 °C by day; card 18–35 °C
First autumn frost	4 November, 151 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	4 August – 23 September
Days left for picking	92
Daylight	15:18 on 9 May, 16:29 on 6 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, November, has 9 rainy days

The same dates in Łódź hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Pumpkin.

Watermelon in Łódź: care after planting

Planted on 6 June: in the first weeks water every 5 days.

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

6 June — feed: balanced (NPK)

Pests and diseases of watermelon 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 Łódź during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, August, averages 24.5 °C. Months that stay below 18 °C even by day on average: October (13.7 °C) and November (7.1 °C). Nights average below 18 °C in every month of the season, from 1.9 °C to 14.6 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	23.6	13.2	68	10	16:39
July	24.3	14.6	89	13	16:15
August	24.5	14.6	86	11	14:41
September	19.8	10.9	64	10	12:43
October	13.7	6.5	64	12	10:45
November	7.1	1.9	40	9	8:52

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Łódź, Opole is 4 days earlier and Radom 1 day later.

City	Distance	Date	Difference
Częstochowa	108 km	5 June – 1 August	1 day earlier
Warsaw	118 km	6 June – 8 August	same day
Radom	123 km	7 June – 6 August	1 day later
Kielce	128 km	7 June – 26 July	1 day later
Toruń	151 km	3 June – 3 August	3 days earlier
Opole	161 km	2 June – 9 August	4 days earlier

Where to buy watermelon plants and seeds near Łódź

Buy plants ready to set out from 6 June to 26 July (from 16 May to 26 July for an unheated greenhouse); seed for raising your own is sown from 18 April to 28 June. Within 15 km of Łódź OpenStreetMap lists 18 garden centres, 2 farm-supply shops, 8 plant nurseries and 27 markets (collected 28 October 2026).

Kwiat Dekor — garden centre
9 km
Ogrodnik — garden centre
9 km
Ogrody Szydłowscy — garden centre
12 km
Sklep ogrodniczy "Ekoraj" — 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.

Questions