When to plant tomatoes in Neuchâtel: 14 May – 8 August

In Neuchâtel, tomato: sow for seedlings from 2 March to 17 June; plant into a greenhouse from 23 April to 8 August; plant out into open ground from 14 May to 8 August. For plants and seeds, the places nearby include Jardin de la main (garden centre, 1 km) and Garden Center Meier (garden centre, 6 km); addresses and opening hours are below.

Tomato in Neuchâtel: soil, season and weather

In Neuchâtel the soil, not frost, sets the date: the last frost is over around 29 March, but the top 7 cm of soil reaches 15 °C — the minimum on the tomato card — only around 14 May, 46 days later.

Last spring frost	29 March
Top 7 cm of soil at 15 °C	14 May, 46 days after the last frost
Into an unheated greenhouse	23 April – 8 August; April outside: 5.5 °C at night, 14.8 °C by day; card 16–27 °C
First autumn frost	28 November, 198 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	23 July – 17 October
Days left for picking	128
Daylight	12:18 on 23 March, 15:00 on 14 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, September, has 12 rainy days

Tomato in Neuchâtel: care after planting

Planted on 14 May: in the first weeks water every 4 days.

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

14 May — feed: balanced (NPK)
11 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 Neuchâtel during the tomato season

No month of the season averages above the tomato card's 16–27 °C by day; the warmest, July, averages 25.1 °C. Months that stay below 16 °C even by day on average: October (15.6 °C) and November (9.2 °C). Nights average below 16 °C in May, June and September–November (4.3–14.7 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	18	9.5	126	15	15:02
June	23.7	14.7	115	15	15:52
July	25.1	16.5	112	13	15:32
August	25.1	16.6	101	13	14:16
September	20.5	13.2	96	12	12:37
October	15.6	9.2	113	13	10:57
November	9.2	4.3	114	14	9:24

ERA5 2016–2025, Open-Meteo

Tomato in nearby cities

Around Neuchâtel, Mulhouse is 1 day earlier and Fribourg 22 days later.

City	Distance	Date	Difference
Fribourg	27 km	5 June – 17 July	22 days later
Bern	40 km	3 June – 14 July	20 days later
Lausanne	57 km	2 June – 31 July	19 days later
Besançon	75 km	16 May – 29 July	2 days later
Basel	81 km	14 May – 31 July	same day
Mulhouse	90 km	13 May – 28 July	1 day earlier

Where to buy tomato plants and seeds near Neuchâtel

Buy plants ready to set out from 14 May to 8 August (from 23 April to 8 August for an unheated greenhouse); seed for raising your own is sown from 2 March to 17 June. Within 15 km of Neuchâtel OpenStreetMap lists 4 garden centres, 3 farm-supply shops, 2 plant nurseries, 2 markets and 20 farm shops (collected 27 October 2026).

Garden-Outlet XXL — garden centre
Gewerbestrasse 14, 3236 Gampelen · Mon–Fri 09:00–18:30; Sat 09:00–17:00 · 10 km · blumenmarkt.ch
Jardin de la main — garden centre
Rue de la Main 6A, 2000 · 1 km
Garden Center Meier — garden centre
Avenue de Longueville 10a, 2013 Colombier · 6 km
Landi — farm supply
Passage des Cèpes, 2053 Cernier · Mon–Fri 08:00–18:30; Sat 08:00–17:00 · 8 km · landi.ch

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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