When to plant watermelons in Kiel: 19 June – 11 August

In Kiel, watermelon: sow for seedlings from 1 May to 14 July; plant into a greenhouse from 29 May to 11 August; plant out into open ground from 19 June to 11 August. For plants and seeds, the places nearby include Hof Villa Wittschap (farm shop, 6 km) and Ziegenhof Rehder (farm shop, 8 km); addresses and opening hours are below.

Watermelon in Kiel: soil, season and weather

In Kiel 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 19 June, 71 days later.

Last spring frost	9 April
Top 7 cm of soil at 18 °C	19 June, 71 days after the last frost
Into an unheated greenhouse	29 May – 11 August; May outside: 8 °C at night, 16.7 °C by day; card 18–35 °C
First autumn frost	20 November, 154 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	17 August – 9 October
Days left for picking	95
Daylight	16:23 on 22 May, 17:13 on 19 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, November, has 13 rainy days

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

Watermelon in Kiel: care after planting

Planted on 19 June: in the first weeks water every 5 days.

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

19 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 Kiel during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, August, averages 21.9 °C. Months that stay below 18 °C even by day on average: October (13.8 °C) and November (8.1 °C). Nights average below 18 °C in every month of the season, from 3.7 °C to 13.6 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	20.9	11.9	72	12	17:11
July	21.4	13.3	93	14	16:42
August	21.9	13.6	65	12	14:57
September	18.9	11.5	61	10	12:47
October	13.8	8.2	81	14	10:37
November	8.1	3.7	56	13	8:32

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

All the nearest cities on our list plant watermelon earlier than Kiel; the closest date is in Rostock, 8 days earlier.

City	Distance	Date	Difference
Hamburg	86 km	6 June – 10 August	13 days earlier
Rostock	130 km	11 June – 8 August	8 days earlier
Bremen	164 km	11 June – 10 August	8 days earlier
Copenhagen	217 km	9 June – 10 August	10 days earlier
Hanover	219 km	7 June – 12 August	12 days earlier
Magdeburg	263 km	3 June – 9 August	16 days earlier

Where to buy watermelon plants and seeds near Kiel

Buy plants ready to set out from 19 June to 11 August (from 29 May to 11 August for an unheated greenhouse); seed for raising your own is sown from 1 May to 14 July. Within 15 km of Kiel OpenStreetMap lists 11 garden centres, 1 farm-supply shop, 1 plant nursery, 9 markets and 19 farm shops (collected 28 October 2026).

Hof Villa Wittschap — farm shop
Rendsburger Landstraße 510, 24111 Kiel · Fri 15:00–18:00; Sat 10:00–13:00 · 6 km
Ziegenhof Rehder — farm shop
Kastanienallee 19, 24220 Boksee · 8 km · ziegenhof-rehder.de
Hof Steffen — farm shop
Am Dorfteich 2, 24253 Probsteierhagen · Thu 08:00–13:00; Fri 08:00–18:00 · 8 km
Hofladen Hof Fock — farm shop
Lang't Dörp 1, 24247 Rodenbek · 24/7 · 9 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