When to plant watermelons in Zlín: 6 June – 28 July

In Zlín, watermelon: sow for seedlings from 18 April to 30 June; plant into a greenhouse from 16 May to 28 July; plant out into open ground from 6 June to 28 July. For plants and seeds, the places nearby include zahradnictví ARBO (garden centre, 11 km) and Kozí farma Vizovice (farm supply, 13 km); addresses and opening hours are below.

Watermelon in Zlín: soil, season and weather

In Zlín the soil, not frost, sets the date: the last frost is over around 19 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 6 June, 48 days later.

Last spring frost	19 April
Top 7 cm of soil at 18 °C	6 June, 48 days after the last frost
Into an unheated greenhouse	16 May – 28 July; May outside: 8.5 °C at night, 18 °C by day; card 18–35 °C
First autumn frost	6 November, 153 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	4 August – 25 September
Days left for picking	94
Daylight	15:01 on 9 May, 16:04 on 6 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, November, has 10 rainy days

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

Watermelon in Zlín: 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 Zlín 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 (14 °C) and November (7.4 °C). Nights average below 18 °C in every month of the season, from 1.9 °C to 15.1 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	23.7	13.6	84	12	16:13
July	24.9	14.7	90	13	15:51
August	25	15.1	95	11	14:27
September	20	11.2	93	10	12:40
October	14	6.6	66	11	10:52
November	7.4	1.9	52	10	9:10

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Zlín, Bratislava is 6 days earlier and Ostrava 2 days later.

City	Distance	Date	Difference
Olomouc	51 km	3 June – 28 July	3 days earlier
Brno	77 km	6 June – 28 July	same day
Ostrava	79 km	8 June – 31 July	2 days later
Bratislava	126 km	31 May – 7 August	6 days earlier
Vienna	147 km	8 June – 3 August	2 days later
Katowice	151 km	6 June – 7 August	same day

Where to buy watermelon plants and seeds near Zlín

Buy plants ready to set out from 6 June to 28 July (from 16 May to 28 July for an unheated greenhouse); seed for raising your own is sown from 18 April to 30 June. Within 15 km of Zlín OpenStreetMap lists 4 garden centres, 1 farm-supply shop and 1 market (collected 28 October 2026).

zahradnictví ARBO — garden centre
Martinice 300, 76901 · Mon–Sat 08:30–17:00; Sun 08:30–12:00 · 11 km
TS Luhačovice - zahradnictví — garden centre
Mon–Fri 06:30–11:00 · 15 km · tsluhacovice.cz
Kozí farma Vizovice — farm supply
Lázeňská 756, 76312 Vizovice · Tue–Wed "po tel. domluvě"; Thu–Fri 14:00–18:00; Sat 09:00–18:00; Sun 14:00–18:00 · 13 km · kozifarmavizovice.cz
Kam-on.cz, prodej kameniva a betonových prefabrikátů — garden centre
5 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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