When to plant tomatoes in Liège: 16 May – 30 July

In Liège, tomato: sow for seedlings from 4 March to 8 June; plant into a greenhouse from 25 April to 30 July; plant out into open ground from 16 May to 30 July. For plants and seeds, the places nearby include Aveve (garden centre, 5 km) and Greenplant (garden centre, 7 km); addresses and opening hours are below.

Tomato in Liège: soil, season and weather

In Liège the soil, not frost, sets the date: the last frost is over around 16 April, but the top 7 cm of soil reaches 15 °C — the minimum on the tomato card — only around 16 May, 30 days later.

Last spring frost	16 April
Top 7 cm of soil at 15 °C	16 May, 30 days after the last frost
Into an unheated greenhouse	25 April – 30 July; April outside: 4.8 °C at night, 14.5 °C by day; card 16–27 °C
First autumn frost	19 November, 187 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	25 July – 8 October
Days left for picking	117
Daylight	12:27 on 25 March, 15:31 on 16 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, August, has 12 rainy days

Tomato in Liège: care after planting

Planted on 16 May: in the first weeks water every 4 days.

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

16 May — feed: balanced (NPK)
13 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 Liège during the tomato season

No month of the season averages above the tomato card's 16–27 °C by day; the warmest, August, averages 23.5 °C. Months that stay below 16 °C even by day on average: October (15.6 °C) and November (10 °C). Nights average below 16 °C in every month of the season, from 4.5 °C to 14.4 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	18.6	8.7	67	11	15:28
June	22.5	13.1	84	12	16:27
July	23.3	14	72	13	16:04
August	23.5	14.4	66	12	14:35
September	20.3	11.7	74	12	12:41
October	15.6	9.2	74	13	10:48
November	10	4.5	68	14	9:00

ERA5 2016–2025, Open-Meteo

Tomato in nearby cities

3 of the nearest cities share Liège's date.

City	Distance	Date	Difference
Hasselt	37 km	10 May – 29 July	6 days earlier
Namur	53 km	16 May – 26 July	same day
Leuven	67 km	10 May – 2 August	6 days earlier
Charleroi	84 km	16 May – 26 July	same day
Brussels	89 km	16 May – 2 August	same day
Ettelbruck	95 km	15 May – 26 July	1 day earlier

Where to buy tomato plants and seeds near Liège

Buy plants ready to set out from 16 May to 30 July (from 25 April to 30 July for an unheated greenhouse); seed for raising your own is sown from 4 March to 8 June. Within 15 km of Liège OpenStreetMap lists 11 garden centres, 3 plant nurseries, 7 markets and 12 farm shops (collected 27 October 2026).

Greenplant — garden centre
Voie de l'Air Pur 21, 4052 Chaudfontaine · Tue–Sat 10:00–18:30; Sun 10:00–13:00 · 7 km · jardineriegreenplant.be
Ets Foguenne - Honda — garden centre
Rue de Ninane 37, 4052 Beaufays (Chaudfontaine) · 9 km · jfoguenne.be
Garden La Pâquerette — garden centre
Chemin des Halles 19, 4651 Herve · Mon–Sat 09:00–18:00; Sun 09:30–17:00 · 14 km
Aveve — garden centre
Rue du Charbonnage 26 · Mon–Sat 09:00–18:00 · 5 km

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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