When to plant tomatoes in Ostrava: 25 May – 20 July

In Ostrava, tomato: sow for seedlings from 13 March to 29 May; plant into a greenhouse from 4 May to 20 July; plant out into open ground from 25 May to 20 July. For plants and seeds, the places nearby include Zahradnictví Havlina (garden centre, 7 km) and Zahradní centrum Vykrut (garden centre, 10 km); addresses and opening hours are below.

Tomato in Ostrava: soil, season and weather

In Ostrava the soil, not frost, sets the date: the last frost is over around 19 April, but the top 7 cm of soil reaches 15 °C — the minimum on the tomato card — only around 25 May, 36 days later.

Last spring frost	19 April
Top 7 cm of soil at 15 °C	25 May, 36 days after the last frost
Into an unheated greenhouse	4 May – 20 July; May outside: 8.3 °C at night, 18.3 °C by day; card 16–27 °C
First autumn frost	9 November, 168 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	3 August – 28 September
Days left for picking	98
Daylight	13:00 on 3 April, 15:48 on 25 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, November, has 10 rainy days

Tomato in Ostrava: care after planting

Planted on 25 May: in the first weeks water every 4 days.

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

25 May — feed: balanced (NPK)
22 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 Ostrava during the tomato season

No month of the season averages above the tomato card's 16–27 °C by day; the warmest, August, averages 25 °C. Months that stay below 16 °C even by day on average: October (14.7 °C) and November (8.1 °C). Nights average below 16 °C in every month of the season, from 2.2 °C to 15 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	18.3	8.3	86	15	15:22
June	23.6	13.5	83	14	16:19
July	24.8	14.8	97	14	15:56
August	25	15	103	11	14:30
September	20.1	11.2	102	11	12:40
October	14.7	6.9	74	12	10:50
November	8.1	2.2	54	10	9:06

ERA5 2016–2025, Open-Meteo

Tomato in nearby cities

All the nearest cities on our list plant tomato earlier than Ostrava; the closest date is in Zlín, 3 days earlier.

City	Distance	Date	Difference
Katowice	73 km	18 May – 27 July	7 days earlier
Olomouc	77 km	17 May – 17 July	8 days earlier
Zlín	79 km	22 May – 17 July	3 days earlier
Opole	97 km	11 May – 29 July	14 days earlier
Kraków	123 km	18 May – 12 July	7 days earlier
Częstochowa	126 km	17 May – 21 July	8 days earlier

Where to buy tomato plants and seeds near Ostrava

Buy plants ready to set out from 25 May to 20 July (from 4 May to 20 July for an unheated greenhouse); seed for raising your own is sown from 13 March to 29 May. Within 15 km of Ostrava OpenStreetMap lists 10 garden centres, 1 farm-supply shop, 3 markets and 1 farm shop (collected 28 October 2026).

Zahradnictví Havlina — garden centre
Mon–Fri 08:00–12:00, 14:30–17:00; Sat 08:00–12:00 · 7 km · havlina.cz
Zahradní centrum Vykrut — garden centre
Mon–Fri 08:00–16:30; Sat 08:00–13:00 · 10 km · vysadime.cz
MOVA Zahradní centrum — garden centre
Kuncovka 7, 73535 Horní Suchá · 15 km
U moudré kozy — farm shop
Národní třída 578/6, 73601 Havířov · Mon–Fri 09:00–17:00; Sat 09:00–12:00 · 13 km · facebook.com

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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