When to plant watermelons in Erfurt: 9 June – 29 July

In Erfurt, watermelon: sow for seedlings from 21 April to 1 July; plant into a greenhouse from 19 May to 29 July; plant out into open ground from 9 June to 29 July. For plants and seeds, the places nearby include Hofladen Kleinrettbach (farm shop, 11 km) and Klostergut (farm shop, 13 km); addresses and opening hours are below.

Watermelon in Erfurt: soil, season and weather

In Erfurt the soil, not frost, sets the date: the last frost is over around 23 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 9 June, 47 days later.

Last spring frost	23 April
Top 7 cm of soil at 18 °C	9 June, 47 days after the last frost
Into an unheated greenhouse	19 May – 29 July; May outside: 8 °C at night, 18.2 °C by day; card 18–35 °C
First autumn frost	7 November, 151 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	7 August – 26 September
Days left for picking	92
Daylight	15:22 on 12 May, 16:25 on 9 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, November, has 10 rainy days

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

Watermelon in Erfurt: care after planting

Planted on 9 June: in the first weeks water every 5 days.

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

9 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 Erfurt during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, August, averages 24.7 °C. Months that stay below 18 °C even by day on average: October (15 °C) and November (8.3 °C). Nights average below 18 °C in every month of the season, from 2.5 °C to 14.1 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	23.5	12.9	61	11	16:31
July	24.4	14.1	61	11	16:07
August	24.7	14.1	63	11	14:36
September	20.5	10.7	53	8	12:42
October	15	7.5	58	13	10:47
November	8.3	2.5	41	10	8:58

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

All the nearest cities on our list plant watermelon earlier than Erfurt; the closest date is in Hanover, 2 days earlier.

City	Distance	Date	Difference
Leipzig	102 km	5 June – 8 August	4 days earlier
Magdeburg	134 km	3 June – 9 August	6 days earlier
Nuremberg	170 km	3 June – 25 July	6 days earlier
Hanover	179 km	7 June – 12 August	2 days earlier
Dresden	190 km	5 June – 9 August	4 days earlier
Frankfurt	192 km	4 June – 8 August	5 days earlier

Where to buy watermelon plants and seeds near Erfurt

Buy plants ready to set out from 9 June to 29 July (from 19 May to 29 July for an unheated greenhouse); seed for raising your own is sown from 21 April to 1 July. Within 15 km of Erfurt OpenStreetMap lists 9 garden centres, 2 farm-supply shops, 6 plant nurseries, 3 markets and 15 farm shops (collected 28 October 2026).

Hofladen Kleinrettbach — farm shop
Mon–Fri 09:00–18:00; Sat 08:00–12:00 · 11 km
Klostergut — farm shop
Mon–Sun 09:00–11:00 · 13 km
Bonsai-Do — garden centre
2 km · bonsai-do.de
Garten-Center „Blühendes Borntal“ — garden centre
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.

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