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

In Radom, watermelon: sow for seedlings from 19 April to 9 July; plant into a greenhouse from 17 May to 6 August; plant out into open ground from 7 June to 6 August.

Watermelon in Radom: soil, season and weather

In Radom the soil, not frost, sets the date: the last frost is over around 20 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 7 June, 48 days later.

Last spring frost	20 April
Top 7 cm of soil at 18 °C	7 June, 48 days after the last frost
Into an unheated greenhouse	17 May – 6 August; May outside: 8.4 °C at night, 19 °C by day; card 18–35 °C
First autumn frost	15 November, 161 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	5 August – 4 October
Days left for picking	102
Daylight	15:19 on 10 May, 16:27 on 7 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, November, has 9 rainy days

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

Watermelon in Radom: 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 Radom during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, August, averages 25 °C. Months that stay below 18 °C even by day on average: October (13.9 °C) and November (7.2 °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	24.3	13.6	69	10	16:35
July	24.8	15	87	14	16:11
August	25	14.8	68	11	14:39
September	20.2	11	66	10	12:42
October	13.9	6.5	64	12	10:46
November	7.2	2	40	9	8:55

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

3 of the nearest cities share Radom's date.

City	Distance	Date	Difference
Kielce	69 km	7 June – 26 July	same day
Warsaw	93 km	6 June – 8 August	1 day earlier
Lublin	100 km	7 June – 1 August	same day
Łódź	123 km	6 June – 26 July	1 day earlier
Częstochowa	156 km	5 June – 1 August	2 days earlier
Rzeszów	163 km	7 June – 6 August	same day

Where to buy watermelon plants and seeds near Radom

Buy plants ready to set out from 7 June to 6 August (from 17 May to 6 August for an unheated greenhouse); seed for raising your own is sown from 19 April to 9 July. Within 15 km of Radom OpenStreetMap lists 11 garden centres, 13 plant nurseries and 6 markets (collected 28 October 2026).

Szkółka Orońsko — plant nursery
15 km
Targ Nad Rzeczką — market
1 km
Targowisko "Na Śląskiej" — market
1 km
Targowisko Osiedlowe Michałów — market
3 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