When to plant watermelons in Nancy: 3 June – 8 August

In Nancy, watermelon: sow for seedlings from 15 April to 11 July; plant into a greenhouse from 13 May to 8 August; plant out into open ground from 3 June to 8 August. For plants and seeds, the places nearby include AMAP La Rainette (farm shop, 2 km) and BioAmap (farm shop, 2 km); addresses and opening hours are below.

Watermelon in Nancy: soil, season and weather

In Nancy the soil, not frost, sets the date: the last frost is over around 13 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 3 June, 51 days later.

Last spring frost	13 April
Top 7 cm of soil at 18 °C	3 June, 51 days after the last frost
Into an unheated greenhouse	13 May – 8 August; May outside: 8.8 °C at night, 18.6 °C by day; card 18–35 °C
First autumn frost	17 November, 167 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	1 August – 6 October
Days left for picking	108
Daylight	14:48 on 6 May, 15:55 on 3 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, August, has 10 rainy days

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

Watermelon in Nancy: care after planting

Planted on 3 June: in the first weeks water every 5 days.

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

3 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 Nancy during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, August, averages 25.4 °C. Months that stay below 18 °C even by day on average: October (15.8 °C) and November (9.2 °C). Nights average below 18 °C in every month of the season, from 3.4 °C to 15 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	23.8	13.6	81	12	16:07
July	25	14.7	66	11	15:46
August	25.4	15	56	10	14:24
September	21.1	11.4	70	10	12:39
October	15.8	8.1	81	12	10:53
November	9.2	3.4	73	14	9:13

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Nancy, Strasbourg is 2 days earlier and Colmar 13 days later.

City	Distance	Date	Difference
Metz	49 km	4 June – 8 August	1 day later
Saarbrücken	86 km	3 June – 9 August	same day
Esch-sur-Alzette	92 km	15 June – 9 August	12 days later
Luxembourg	103 km	7 June – 9 August	4 days later
Colmar	110 km	16 June – 8 August	13 days later
Strasbourg	116 km	1 June – 11 August	2 days earlier

Where to buy watermelon plants and seeds near Nancy

Buy plants ready to set out from 3 June to 8 August (from 13 May to 8 August for an unheated greenhouse); seed for raising your own is sown from 15 April to 11 July. Within 15 km of Nancy OpenStreetMap lists 10 garden centres, 14 markets and 28 farm shops (collected 27 October 2026).

AMAP La Rainette — farm shop
Fri 18:00–20:00 · 2 km · amaplarainette.fr
BioAmap — farm shop
Tue 18:00–20:00 · 2 km · bioamap.fr
Cours des Halles — farm shop
Tue–Thu 08:00–12:30, 15:00–19:00; Fri 08:00–12:30, 14:30–19:00; Sat 08:00–12:30, 14:30–18:30 · 6 km · cours-des-halles-fruits-et-legumes.business.site
Les Terroirs de Stanislas — farm shop
Wed 14:00–19:00; Thu–Fri 10:00–13:00, 14:00–19:00; Sat 09:00–12:00 · 6 km · lesterroirsdestanislas.jimdofree.com

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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