When to plant watermelons in Bremen: 11 June – 10 August

In Bremen, watermelon: sow for seedlings from 23 April to 13 July; plant into a greenhouse from 21 May to 10 August; plant out into open ground from 11 June to 10 August.

Watermelon in Bremen: soil, season and weather

In Bremen the soil, not frost, sets the date: the last frost is over around 7 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 11 June, 65 days later.

Last spring frost	7 April
Top 7 cm of soil at 18 °C	11 June, 65 days after the last frost
Into an unheated greenhouse	21 May – 10 August; May outside: 8.5 °C at night, 18.2 °C by day; card 18–35 °C
First autumn frost	19 November, 161 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	9 August – 8 October
Days left for picking	102
Daylight	15:45 on 14 May, 16:51 on 11 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, September, has 10 rainy days

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

Watermelon in Bremen: care after planting

Planted on 11 June: in the first weeks water every 5 days.

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

11 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 Bremen during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, August, averages 23.4 °C. Months that stay below 18 °C even by day on average: October (14.9 °C) and November (8.9 °C). Nights average below 18 °C in every month of the season, from 3.9 °C to 14.1 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	22.3	12.6	80	12	16:55
July	22.8	13.9	78	14	16:28
August	23.4	14.1	58	11	14:49
September	19.9	11.5	54	10	12:45
October	14.9	8.6	76	14	10:41
November	8.9	3.9	60	14	8:42

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Bremen, Münster is 10 days earlier and Kiel 8 days later.

City	Distance	Date	Difference
Hamburg	95 km	6 June – 10 August	5 days earlier
Hanover	101 km	7 June – 12 August	4 days earlier
Bielefeld	119 km	5 June – 9 August	6 days earlier
Münster	148 km	1 June – 12 August	10 days earlier
Kiel	164 km	19 June – 11 August	8 days later
Dortmund	197 km	5 June – 7 August	6 days earlier

Where to buy watermelon plants and seeds near Bremen

Buy plants ready to set out from 11 June to 10 August (from 21 May to 10 August for an unheated greenhouse); seed for raising your own is sown from 23 April to 13 July. Within 15 km of Bremen OpenStreetMap lists 37 garden centres, 2 farm-supply shops, 1 plant nursery, 28 markets and 21 farm shops (collected 28 October 2026).

Kurfürsten Markt — market
Fri 08:00–13:00 · 5 km
Robert-Bunsen-Straße — market
Thu, Sat 08:00–13:00 · 6 km
Bauernmarkt Fangturm — market
Fri 10:00–16:00 · 0 km
Wochenmarkt Delmestraße — market
Mon–Fri 08:00–13:30, Sat 08:00–14:00 · 2 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