When to plant tomatoes in Quimper: 19 May – 19 August

In Quimper, tomato: sow for seedlings from 7 March to 28 June; plant into a greenhouse from 28 April to 19 August; plant out into open ground from 19 May to 19 August. For plants and seeds, the places nearby include Cultivert (garden centre, 2 km) and Les Jardins de Kervilier (garden centre, 3 km); addresses and opening hours are below.

Tomato in Quimper: soil, season and weather

In Quimper the soil, not frost, sets the date: the last frost is over around 8 March, but the top 7 cm of soil reaches 15 °C — the minimum on the tomato card — only around 19 May, 72 days later.

Last spring frost	8 March
Top 7 cm of soil at 15 °C	19 May, 72 days after the last frost
Into an unheated greenhouse	28 April – 19 August; April outside: 6.7 °C at night, 14.7 °C by day; card 16–27 °C
First autumn frost	9 December, 204 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	28 July – 28 October
Days left for picking	134
Daylight	12:36 on 28 March, 15:19 on 19 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, August, has 11 rainy days

Tomato in Quimper: care after planting

Planted on 19 May: in the first weeks water every 4 days.

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

19 May — feed: balanced (NPK)
16 June — 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 Quimper during the tomato season

No month of the season averages above the tomato card's 16–27 °C by day; the warmest, July, averages 22.1 °C. Months that stay below 16 °C even by day on average: November (12.6 °C) and December (10.6 °C). Nights average below 16 °C in every month of the season, from 5.9 °C to 14.1 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	17.8	9.6	72	12	15:09
June	20.6	12.6	80	13	16:01
July	22.1	14.1	71	11	15:41
August	22.1	14.1	65	11	14:21
September	19.7	12.5	79	13	12:38
October	16.4	10.4	129	15	10:55
November	12.6	7.6	132	16	9:17
December	10.6	5.9	144	17	8:24

ERA5 2016–2025, Open-Meteo

Tomato in nearby cities

Around Quimper, La Rochelle is 21 days earlier and Plymouth 33 days later.

City	Distance	Date	Difference
Brest (France)	52 km	26 May – 23 August	7 days later
Rennes	180 km	13 May – 8 August	6 days earlier
Nantes	210 km	1 May – 9 August	18 days earlier
Plymouth	264 km	21 June – 11 August	33 days later
Angers	272 km	5 May – 7 August	14 days earlier
La Rochelle	303 km	28 April – 22 August	21 days earlier

Where to buy tomato plants and seeds near Quimper

Buy plants ready to set out from 19 May to 19 August (from 28 April to 19 August for an unheated greenhouse); seed for raising your own is sown from 7 March to 28 June. Within 15 km of Quimper OpenStreetMap lists 7 garden centres, 4 farm-supply shops, 1 plant nursery, 7 markets and 12 farm shops (collected 27 October 2026).

Magasin Vert — garden centre
Route Quimper 16, 29170 Pleuven · Mon–Fri 09:30–12:00, 14:00–19:00; Sat 09:30–12:30, 14:00–19:00 · 12 km · monmagasinvert.fr
Point Vert — garden centre
Za de Peronic, 29180 Plogonnec · Mon–Sat 09:00–12:00, 14:00–18:00 · 11 km · monmagasinvert.fr
Cultivert — garden centre
Avenue Saint-Denis, 29000 Quimper · Mon–Sat 09:00–12:00, 14:00–18:00 · 2 km
Les Jardins de Kervilier — garden centre
Mon–Sat 09:30–19:00; public holidays, Sun 10:00–12:30, 14:00–18:30 · 3 km · monmagasinvert.fr

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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