When to plant tomatoes in Graz: 21 May – 21 July

In Graz, tomato: sow for seedlings from 9 March to 30 May; plant into a greenhouse from 30 April to 21 July; plant out into open ground from 21 May to 21 July. For plants and seeds, the places nearby include Gartenbau Friedl (garden centre, 3 km) and Städtische Gärtnerei (garden centre, 6 km); addresses and opening hours are below.

Tomato in Graz: soil, season and weather

In Graz 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 21 May, 35 days later.

Last spring frost	16 April
Top 7 cm of soil at 15 °C	21 May, 35 days after the last frost
Into an unheated greenhouse	30 April – 21 July; April outside: 4.5 °C at night, 15.8 °C by day; card 16–27 °C
First autumn frost	10 November, 173 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	30 July – 29 September
Days left for picking	103
Daylight	12:41 on 30 March, 15:17 on 21 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, October, has 8 rainy days

Tomato in Graz: care after planting

Planted on 21 May: in the first weeks water every 4 days.

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

21 May — feed: balanced (NPK)
18 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 Graz during the tomato season

No month of the season averages above the tomato card's 16–27 °C by day; the warmest, July, averages 26.1 °C. Months that stay below 16 °C even by day on average: November (8.9 °C). Nights average below 16 °C in every month of the season, from 1.2 °C to 15.5 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	19	9	119	15	15:03
June	24.9	14.3	99	13	15:53
July	26.1	15.5	94	13	15:33
August	25.8	15.4	108	12	14:16
September	20.9	11.2	110	11	12:37
October	16.2	6.4	56	8	10:57
November	8.9	1.2	61	9	9:23

ERA5 2016–2025, Open-Meteo

Tomato in nearby cities

Around Graz, Zagreb is 19 days earlier and Klagenfurt 46 days later.

City	Distance	Date	Difference
Klagenfurt	99 km	6 July – 16 July	46 days later
Vienna	145 km	23 May – 23 July	2 days later
Zagreb	146 km	2 May – 2 August	19 days earlier
Linz	163 km	14 May – 23 July	7 days earlier
Bratislava	173 km	14 May – 27 July	7 days earlier
Salzburg	198 km	25 May – 11 July	4 days later

Where to buy tomato plants and seeds near Graz

Buy plants ready to set out from 21 May to 21 July (from 30 April to 21 July for an unheated greenhouse); seed for raising your own is sown from 9 March to 30 May. Within 15 km of Graz OpenStreetMap lists 24 garden centres, 5 plant nurseries, 30 markets and 47 farm shops (collected 28 October 2026).

Gartenbau Friedl — garden centre
Kalvarienbergstraße 81, 8020 Graz · Mon–Fri 07:30–18:30; Sat 08:00–17:00; Sun, public holidays 08:00–12:00 · 3 km · blumen-friedl.at
Städtische Gärtnerei — garden centre
Martinhofstraße 15, 8054 Graz · Mon–Fri 08:00–13:00 · 6 km · holding-graz.at
Painer Gartenparadies — garden centre
Badstraße 48, 8063 Eggersdorf bei Graz · Mon–Sat 09:00–12:00; Mon–Fri 14:00–17:00 · 12 km · painer.com
Micko Pflanzenparadies — garden centre
Rosengasse 21, 8501 · Mon–Fri 09:00–18:00; Sat 09:00–17:00 · 15 km · micko.at

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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