When to plant zucchini in Nantes: 28 May – 12 September

In Nantes, zucchini: sow for seedlings from 16 April to 22 August; plant into a greenhouse from 7 May to 12 September; plant out into open ground from 28 May to 12 September.

Zucchini in Nantes: soil, season and weather

In Nantes the soil, not frost, sets the date: the last frost is over around 7 March, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 28 May, 82 days later.

Last spring frost	7 March
Top 7 cm of soil at 18 °C	28 May, 82 days after the last frost
First autumn frost	29 November, 185 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	3 July – 18 October
Days left for picking	149
Daylight	14:42 on 7 May, 15:32 on 28 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, July, has 8 rainy days

The same dates in Nantes hold for Cucumber, Bell Pepper, Eggplant, Pumpkin and Watermelon.

Zucchini in Nantes: care after planting

Planted on 28 May: in the first weeks water every 4 days.

Pests and diseases of zucchini to watch for:

Weather in Nantes during the zucchini season

About 453 mm of rain falls in the season; July is the driest month (37 mm) and October the wettest (102 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	19.6	10.4	59	12	15:04
June	23.4	14.1	69	11	15:54
July	25.2	15.4	37	8	15:34
August	25.5	15.5	40	7	14:17
September	22.3	13.1	56	10	12:37
October	18	10.4	102	12	10:57
November	12.8	6.4	90	13	9:22

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

2 of the nearest cities share Nantes's date.

City	Distance	Date	Difference
Angers	80 km	28 May – 10 September	same day
Rennes	99 km	1 June – 11 September	4 days later
La Rochelle	122 km	28 May – 25 September	same day
Le Mans	157 km	31 May – 7 September	3 days later
Poitiers	160 km	30 May – 2 September	2 days later
Tours	170 km	31 May – 10 September	3 days later

Where to buy zucchini plants and seeds near Nantes

Buy plants ready to set out from 28 May to 12 September (from 7 May to 12 September for an unheated greenhouse); seed for raising your own is sown from 16 April to 22 August. Within 15 km of Nantes OpenStreetMap lists 18 garden centres, 1 plant nursery, 51 markets and 22 farm shops (collected 20 October 2026).

Marché d'intérêt national de Nantes Métropole — market
Boulevard Alfred Nobel 71, 44400 Rezé · 7 km · minnantes.com
Marché de la cale de Beautour — market
Thu 08:00–13:00 · 5 km · metropole.nantes.fr
AMAP de la Manu — market
Thu 18:15–19:30 · 1 km · amapdelamanu.fr
Marché de la Caserne — market
Thu 17:00–20:00 · 1 km · linktr.ee

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