When to plant tomatoes in Klagenfurt: 6 July – 16 July

In Klagenfurt, tomato: sow for seedlings from 24 April to 25 May; plant into a greenhouse from 15 June to 16 July; plant out into open ground from 6 July to 16 July. For plants and seeds, the places nearby include Gärtnerei Hübner (garden centre, 2 km) and Gartenwelt Kropfitsch (garden centre, 2 km); addresses and opening hours are below.

Tomato in Klagenfurt: soil, season and weather

In Klagenfurt the soil, not frost, sets the date: the last frost is over around 21 May, but the top 7 cm of soil reaches 15 °C — the minimum on the tomato card — only around 6 July, 46 days later. Planting out on 6 July leaves 80 days to the first autumn frost on 24 September, only 10 more than the card's 70 days to the first harvest; an unheated greenhouse, three weeks earlier, would add 21.

Last spring frost	21 May
Top 7 cm of soil at 15 °C	6 July, 46 days after the last frost
Into an unheated greenhouse	15 June – 16 July; June outside: 7.7 °C at night, 17.2 °C by day; card 16–27 °C
First autumn frost	24 September, 80 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	14 September – 24 September
Days left for picking	10
Daylight	15:00 on 15 May, 15:42 on 6 July
Watering outdoors when fruiting (card)	every 3 days; the driest month, August, has 15 rainy days

Tomato in Klagenfurt: care after planting

Planted on 6 July: in the first weeks water every 4 days.

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

6 July — feed: balanced (NPK)
3 August — 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 Klagenfurt during the tomato season

No month of the season averages above the tomato card's 16–27 °C by day; the warmest, July, averages 18.6 °C. Months that stay below 16 °C even by day on average: September (13.6 °C). Nights average below 16 °C in every month of the season, from 4.9 °C to 9.1 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
July	18.6	9.1	135	18	15:30
August	18.3	9	130	15	14:14
September	13.6	4.9	153	15	12:36

ERA5 2016–2025, Open-Meteo

Tomato in nearby cities

All the nearest cities on our list plant tomato earlier than Klagenfurt; the closest date is in Salzburg, 42 days earlier.

City	Distance	Date	Difference
Graz	99 km	21 May – 21 July	46 days earlier
Udine	102 km	29 April – 2 August	68 days earlier
Trieste	115 km	18 May – 8 August	49 days earlier
Zagreb	157 km	2 May – 2 August	65 days earlier
Salzburg	163 km	25 May – 11 July	42 days earlier
Linz	188 km	14 May – 23 July	53 days earlier

Where to buy tomato plants and seeds near Klagenfurt

Buy plants ready to set out from 6 July to 16 July (from 15 June to 16 July for an unheated greenhouse); seed for raising your own is sown from 24 April to 25 May. Within 15 km of Klagenfurt OpenStreetMap lists 11 garden centres, 1 plant nursery, 2 markets and 7 farm shops (collected 28 October 2026).

Baumschule Mattuschka Gartengestaltung — garden centre
Tessendorfer Straße 358, 9061 Klagenfurt am Wörthersee · 6 km · mattuschka.com
Gartenwelt Kropfitsch — garden centre
St. Veiter Straße 84, 9020 Klagenfurt am Wörthersee · 2 km · gartenwelt-kropfitsch.at
LustGARTEN Lustig Garten und HandelsgmbH — garden centre
Rosentaler Straße 145, 9020 Klagenfurt am Wörthersee · 2 km · lustgarten.at
Gärtnerei Hübner — garden centre
Pischeldorfer Straße 62, Klagenfurt am Wörthersee · 2 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.

Questions