When to plant watermelons in České Budějovice: 18 June – 28 July

In České Budějovice, watermelon: sow for seedlings from 30 April to 30 June; plant into a greenhouse from 28 May to 28 July; plant out into open ground from 18 June to 28 July.

Watermelon in České Budějovice: soil, season and weather

In České Budějovice 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 18 June, 61 days later.

Last spring frost	18 April
Top 7 cm of soil at 18 °C	18 June, 61 days after the last frost
Into an unheated greenhouse	28 May – 28 July; May outside: 7.6 °C at night, 17.9 °C by day; card 18–35 °C
First autumn frost	6 November, 141 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	16 August – 25 September
Days left for picking	82
Daylight	15:31 on 21 May, 16:12 on 18 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, November, has 10 rainy days

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

Watermelon in České Budějovice: care after planting

Planted on 18 June: in the first weeks water every 5 days.

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

18 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 České Budějovice during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, August, averages 24.4 °C. Months that stay below 18 °C even by day on average: October (14.8 °C) and November (7.7 °C). Nights average below 18 °C in every month of the season, from 1.1 °C to 13.9 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	23.4	12.7	87	13	16:10
July	24.3	13.9	76	12	15:49
August	24.4	13.9	87	11	14:26
September	19.9	10.2	70	10	12:39
October	14.8	6.1	50	10	10:52
November	7.7	1.1	49	10	9:11

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

1 of the nearest cities share České Budějovice's date.

City	Distance	Date	Difference
Linz	75 km	4 June – 3 August	14 days earlier
Plzeň	117 km	18 June – 27 July	same day
Prague	123 km	3 June – 30 July	15 days earlier
Pardubice	152 km	5 June – 1 August	13 days earlier
Brno	158 km	6 June – 28 July	12 days earlier
Vienna	163 km	8 June – 3 August	10 days earlier

Where to buy watermelon plants and seeds near České Budějovice

Buy plants ready to set out from 18 June to 28 July (from 28 May to 28 July for an unheated greenhouse); seed for raising your own is sown from 30 April to 30 June. Within 15 km of České Budějovice OpenStreetMap lists 4 garden centres, 2 farm-supply shops and 1 market (collected 28 October 2026).

Zahradnictví SAFRO — garden centre
12 km · havlis.cz
Zámecké zahradnictví — garden centre
9 km
Stromovous — garden centre
1 km
Zahradní centrun — garden centre
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