When to plant watermelons in Ústí nad Labem: 22 June – 3 August

In Ústí nad Labem, watermelon: sow for seedlings from 4 May to 6 July; plant into a greenhouse from 1 June to 3 August; plant out into open ground from 22 June to 3 August. For plants and seeds, the places nearby include Zahradnické centrum Teplice (garden centre, 14 km); addresses and opening hours are below.

Watermelon in Ústí nad Labem: soil, season and weather

In Ústí nad Labem the soil, not frost, sets the date: the last frost is over around 27 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 22 June, 56 days later.

Last spring frost	27 April
Top 7 cm of soil at 18 °C	22 June, 56 days after the last frost
Into an unheated greenhouse	1 June – 3 August; June outside: 12.4 °C at night, 21.4 °C by day; card 18–35 °C
First autumn frost	12 November, 143 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	20 August – 1 October
Days left for picking	84
Daylight	15:55 on 25 May, 16:29 on 22 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, November, has 11 rainy days

The same dates in Ústí nad Labem hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Pumpkin.

Watermelon in Ústí nad Labem: care after planting

Planted on 22 June: in the first weeks water every 5 days.

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

22 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 Ústí nad Labem during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 22.2 °C. Months that stay below 18 °C even by day on average: October (12.2 °C) and November (5.4 °C). Nights average below 18 °C in every month of the season, from 0.9 °C to 13.5 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	21.4	12.4	79	12	16:27
July	22.2	13.3	87	13	16:04
August	22.2	13.5	88	13	14:35
September	18	10.1	70	11	12:41
October	12.2	6.2	68	13	10:48
November	5.4	0.9	48	11	9:00

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

1 of the nearest cities share Ústí nad Labem's date.

City	Distance	Date	Difference
Dresden	48 km	5 June – 9 August	17 days earlier
Prague	71 km	3 June – 30 July	19 days earlier
Liberec	74 km	22 June – 23 July	same day
Plzeň	111 km	18 June – 27 July	4 days earlier
Hradec Králové	137 km	7 June – 2 August	15 days earlier
Leipzig	139 km	5 June – 8 August	17 days earlier

Where to buy watermelon plants and seeds near Ústí nad Labem

Buy plants ready to set out from 22 June to 3 August (from 1 June to 3 August for an unheated greenhouse); seed for raising your own is sown from 4 May to 6 July. Within 15 km of Ústí nad Labem OpenStreetMap lists 1 garden centre, 1 market and 1 farm shop (collected 28 October 2026).

Zahradnické centrum Teplice — garden centre
Stanová 1998, 41501 · Mon–Sun 08:00–19:00 · 14 km · dvorakasyn.cz
Ústecká burza — market
4 km
Vacheria - farma Kletečná — farm shop
11 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.

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