When to plant watermelons in Hanover: 7 June – 12 August

In Hanover, watermelon: sow for seedlings from 19 April to 15 July; plant into a greenhouse from 17 May to 12 August; plant out into open ground from 7 June to 12 August.

Watermelon in Hanover: soil, season and weather

In Hanover the soil, not frost, sets the date: the last frost is over around 9 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 7 June, 59 days later.

Last spring frost	9 April
Top 7 cm of soil at 18 °C	7 June, 59 days after the last frost
Into an unheated greenhouse	17 May – 12 August; May outside: 8.6 °C at night, 18.6 °C by day; card 18–35 °C
First autumn frost	21 November, 167 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	5 August – 10 October
Days left for picking	108
Daylight	15:26 on 10 May, 16:38 on 7 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, September, has 9 rainy days

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

Watermelon in Hanover: 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 Hanover 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 (15.1 °C) and November (8.9 °C). Nights average below 18 °C in every month of the season, from 3.7 °C to 14.4 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	23.1	13.1	67	11	16:46
July	23.5	14.2	69	12	16:21
August	24.1	14.4	54	11	14:45
September	20.4	11.4	48	9	12:44
October	15.1	8.5	65	13	10:43
November	8.9	3.7	55	13	8:48

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Hanover, Münster is 6 days earlier and Bremen 4 days later.

City	Distance	Date	Difference
Bielefeld	91 km	5 June – 9 August	2 days earlier
Bremen	101 km	11 June – 10 August	4 days later
Magdeburg	132 km	3 June – 9 August	4 days earlier
Hamburg	132 km	6 June – 10 August	1 day earlier
Münster	150 km	1 June – 12 August	6 days earlier
Erfurt	179 km	9 June – 29 July	2 days later

Where to buy watermelon plants and seeds near Hanover

Buy plants ready to set out from 7 June to 12 August (from 17 May to 12 August for an unheated greenhouse); seed for raising your own is sown from 19 April to 15 July. Within 15 km of Hanover OpenStreetMap lists 20 garden centres, 3 farm-supply shops, 7 plant nurseries, 20 markets and 30 farm shops (collected 28 October 2026).

Bauernmarkt an der Marktkirche — market
Thu 14:00–18:00 · 0 km · hannover.de
Wochenmarkt Oststadt (Lister Meile) — market
Thu 14:00–18:00 · 3 km · hannover.de
Bauernmarkt Bult — market
Sat 08:00–12:30; Mon–Fri closed; Sun closed · 3 km · bauernmarkt-hannover.de
Wochenmarkt Jahnplatz/Auf dem Dorn — market
Mon–Thu 07:30–16:00; Fri 07:30–13:00 · 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.

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