When to plant watermelons in Münster: 1 June – 12 August

In Münster, watermelon: sow for seedlings from 13 April to 15 July; plant into a greenhouse from 11 May to 12 August; plant out into open ground from 1 June to 12 August.

Watermelon in Münster: soil, season and weather

In Münster the soil, not frost, sets the date: the last frost is over around 15 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 1 June, 47 days later.

Last spring frost	15 April
Top 7 cm of soil at 18 °C	1 June, 47 days after the last frost
Into an unheated greenhouse	11 May – 12 August; May outside: 8.8 °C at night, 19.2 °C by day; card 18–35 °C
First autumn frost	21 November, 173 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	30 July – 10 October
Days left for picking	114
Daylight	15:03 on 4 May, 16:23 on 1 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, August, has 13 rainy days

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

Watermelon in Münster: care after planting

Planted on 1 June: in the first weeks water every 5 days.

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

1 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 Münster during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, August, averages 24.1 °C. Months that stay below 18 °C even by day on average: October (15.4 °C) and November (9.5 °C). Nights average below 18 °C in every month of the season, from 3.9 °C to 14.5 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	23.3	13.3	74	12	16:42
July	23.6	14.2	70	13	16:17
August	24.1	14.5	60	13	14:42
September	20.4	11.5	60	11	12:43
October	15.4	8.7	74	14	10:44
November	9.5	3.9	63	13	8:51

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

All the nearest cities on our list plant watermelon later than Münster; the closest date is in Bochum, 2 days later.

City	Distance	Date	Difference
Dortmund	51 km	5 June – 7 August	4 days later
Bochum	60 km	3 June – 11 August	2 days later
Bielefeld	62 km	5 June – 9 August	4 days later
Essen	70 km	3 June – 12 August	2 days later
Duisburg	84 km	3 June – 13 August	2 days later
Düsseldorf	100 km	3 June – 12 August	2 days later

Where to buy watermelon plants and seeds near Münster

Buy plants ready to set out from 1 June to 12 August (from 11 May to 12 August for an unheated greenhouse); seed for raising your own is sown from 13 April to 15 July. Within 15 km of Münster OpenStreetMap lists 18 garden centres, 6 farm-supply shops, 1 plant nursery, 16 markets and 42 farm shops (collected 28 October 2026).

Gemüse und Oliven — market
Gremmendorfer Weg, 48167 · Fri 13:30–18:00 · 4 km
Gemüse — market
Pängelantonweg, 48167 Münster · Fri 13:30–18:00 · 4 km
Käse — market
Gremmendorfer Weg, 48167 Münster · Fri 13:30–18:00 · 4 km
Reckermann — market
Gremmendorfer Weg, 48167 Münster · Fri 13:30–18:00 · 4 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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