When to plant tomatoes in Nantes: 1 May – 9 August

In Nantes, tomato: sow for seedlings from 17 February to 18 June; plant into a greenhouse from 10 April to 9 August; plant out into open ground from 1 May to 9 August. For plants and seeds, the places nearby include Truffaut (garden centre, 5 km) and La jardinerie orvaltaise (garden centre, 6 km); addresses and opening hours are below.

Tomato 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 15 °C — the minimum on the tomato card — only around 1 May, 55 days later.

Last spring frost	7 March
Top 7 cm of soil at 15 °C	1 May, 55 days after the last frost
Into an unheated greenhouse	10 April – 9 August; April outside: 7 °C at night, 16.2 °C by day; card 16–27 °C
First autumn frost	29 November, 212 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	10 July – 18 October
Days left for picking	142
Daylight	11:33 on 10 March, 14:25 on 1 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, July, has 8 rainy days

Tomato in Nantes: care after planting

Planted on 1 May: in the first weeks water every 4 days.

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

1 May — feed: balanced (NPK)
29 May — feed: nitrogen

Pests and diseases of tomato 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 Nantes during the tomato season

No month of the season averages above the tomato card's 16–27 °C by day; the warmest, August, averages 25.5 °C. Months that stay below 16 °C even by day on average: November (12.8 °C). Nights average below 16 °C in every month of the season, from 6.4 °C to 15.5 °C.

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

Tomato in nearby cities

Around Nantes, La Rochelle is 3 days earlier and Rennes 12 days later.

City	Distance	Date	Difference
Angers	80 km	5 May – 7 August	4 days later
Rennes	99 km	13 May – 8 August	12 days later
La Rochelle	122 km	28 April – 22 August	3 days earlier
Le Mans	157 km	8 May – 4 August	7 days later
Poitiers	160 km	7 May – 30 July	6 days later
Tours	170 km	8 May – 7 August	7 days later

Where to buy tomato plants and seeds near Nantes

Buy plants ready to set out from 1 May to 9 August (from 10 April to 9 August for an unheated greenhouse); seed for raising your own is sown from 17 February to 18 June. Within 15 km of Nantes OpenStreetMap lists 18 garden centres, 1 plant nursery, 51 markets and 22 farm shops (collected 20 October 2026).

Atlantic Vert — garden centre
Route des Sorinières 166 · Mon–Fri 09:00–12:30, 14:00–19:00 · 8 km · atlantic-vert.fr
Truffaut — garden centre
Mon–Sat 09:30–19:00; Sun 09:30–13:00, 14:30–18:30 · 5 km · truffaut.com
La jardinerie orvaltaise — garden centre
Mon–Sat 09:00–12:30, 14:00–19:00 · 6 km · jardinerie-orvaltaise.com
Jardiland — garden centre
Mon–Fri 09:30–12:30, 14:00–19:00; Sat 09:30–19:00; Sun 09:30–12:30, 14:00–19:00 · 7 km · jardiland.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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