When to plant watermelons in Katowice: 6 June – 7 August

In Katowice, watermelon: sow for seedlings from 18 April to 10 July; plant into a greenhouse from 16 May to 7 August; plant out into open ground from 6 June to 7 August.

Watermelon in Katowice: soil, season and weather

In Katowice the soil, not frost, sets the date: the last frost is over around 15 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 6 June, 52 days later.

Last spring frost	15 April
Top 7 cm of soil at 18 °C	6 June, 52 days after the last frost
Into an unheated greenhouse	16 May – 7 August; May outside: 8.5 °C at night, 18.3 °C by day; card 18–35 °C
First autumn frost	16 November, 163 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	4 August – 5 October
Days left for picking	104
Daylight	15:08 on 9 May, 16:14 on 6 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, November, has 10 rainy days

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

Watermelon in Katowice: 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 Katowice during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, August, averages 24.6 °C. Months that stay below 18 °C even by day on average: October (14.4 °C) and November (7.8 °C). Nights average below 18 °C in every month of the season, from 2 °C to 15 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	23.7	13.6	73	12	16:23
July	24.4	14.8	98	14	16:00
August	24.6	15	89	11	14:32
September	20	11.1	85	12	12:41
October	14.4	6.5	63	12	10:49
November	7.8	2	54	10	9:03

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Katowice, Opole is 4 days earlier and Ostrava 2 days later.

City	Distance	Date	Difference
Częstochowa	62 km	5 June – 1 August	1 day earlier
Kraków	69 km	6 June – 23 July	same day
Ostrava	73 km	8 June – 31 July	2 days later
Opole	90 km	2 June – 9 August	4 days earlier
Kielce	132 km	7 June – 26 July	1 day later
Olomouc	147 km	3 June – 28 July	3 days earlier

Where to buy watermelon plants and seeds near Katowice

Buy plants ready to set out from 6 June to 7 August (from 16 May to 7 August for an unheated greenhouse); seed for raising your own is sown from 18 April to 10 July. Within 15 km of Katowice OpenStreetMap lists 25 garden centres, 1 farm-supply shop, 7 plant nurseries, 33 markets and 3 farm shops (collected 28 October 2026).

Targowisko — market
Modrzejowska 50, 42-500 Będzin · 11 km
Targowisko Halemba II — market
Solidarności 20, 41-706 Ruda Śląska · 14 km
Targowisko w Murckach — market
24/7 · 7 km
Targowisko Handlowe — market
Mon–Sat 06:00–15:00 · 10 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