When to plant watermelons in Kielce: 7 June – 26 July

In Kielce, watermelon: sow for seedlings from 19 April to 28 June; plant into a greenhouse from 17 May to 26 July; plant out into open ground from 7 June to 26 July. For plants and seeds, the places nearby include Pan Pomidor (farm shop, 1 km); addresses and opening hours are below.

Watermelon in Kielce: soil, season and weather

In Kielce the soil, not frost, sets the date: the last frost is over around 18 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 7 June, 50 days later.

Last spring frost	18 April
Top 7 cm of soil at 18 °C	7 June, 50 days after the last frost
Into an unheated greenhouse	17 May – 26 July; May outside: 8.3 °C at night, 18.2 °C by day; card 18–35 °C
First autumn frost	4 November, 150 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	5 August – 23 September
Days left for picking	91
Daylight	15:15 on 10 May, 16:21 on 7 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, November, has 10 rainy days

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

Watermelon in Kielce: care after planting

Planted on 7 June: in the first weeks water every 5 days.

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

7 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 Kielce during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, August, averages 24.7 °C. Months that stay below 18 °C even by day on average: October (13.8 °C) and November (7.1 °C). Nights average below 18 °C in every month of the season, from 1.4 °C to 14.8 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	23.7	13.5	65	11	16:30
July	24.5	14.8	79	14	16:06
August	24.7	14.7	74	10	14:36
September	19.7	10.9	69	11	12:42
October	13.8	5.9	63	11	10:47
November	7.1	1.4	46	10	8:59

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

2 of the nearest cities share Kielce's date.

City	Distance	Date	Difference
Radom	69 km	7 June – 6 August	same day
Kraków	102 km	6 June – 23 July	1 day earlier
Częstochowa	106 km	5 June – 1 August	2 days earlier
Łódź	128 km	6 June – 26 July	1 day earlier
Katowice	132 km	6 June – 7 August	1 day earlier
Rzeszów	134 km	7 June – 6 August	same day

Where to buy watermelon plants and seeds near Kielce

Buy plants ready to set out from 7 June to 26 July (from 17 May to 26 July for an unheated greenhouse); seed for raising your own is sown from 19 April to 28 June. Within 15 km of Kielce OpenStreetMap lists 6 garden centres, 1 farm-supply shop, 6 markets and 3 farm shops (collected 28 October 2026).

Pan Pomidor — farm shop
Tue–Fri 08:00–15:00; Sat 07:30–14:00 · 1 km
Ogród Serwis — garden centre
2 km · zielonestudiokielce.pl
ACM Agrocentrum — garden centre
3 km
Agrocentrum — garden centre
1 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