When to plant zucchini in Ostrava: 8 June – 23 August

In Ostrava, zucchini: sow for seedlings from 27 April to 2 August; plant into a greenhouse from 18 May to 23 August; plant out into open ground from 8 June to 23 August. For plants and seeds, the places nearby include Zahradní centrum Vykrut (garden centre, 10 km) and U moudré kozy (farm shop, 13 km); addresses and opening hours are below.

Zucchini 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 18 °C — the minimum on the zucchini card — only around 8 June, 50 days later.

Last spring frost	19 April
Top 7 cm of soil at 18 °C	8 June, 50 days after the last frost
First autumn frost	9 November, 154 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	14 July – 28 September
Days left for picking	118
Daylight	15:30 on 18 May, 16:12 on 8 June
Watering outdoors when fruiting (card)	every 3 days; the driest month, November, has 10 rainy days

The same dates in Ostrava hold for Cucumber, Bell Pepper, Eggplant, Pumpkin and Watermelon.

Zucchini in Ostrava: care after planting

Planted on 8 June: in the first weeks water every 4 days.

Pests and diseases of zucchini to watch for:

Weather in Ostrava during the zucchini season

About 513 mm of rain falls in the season; November is the driest month (54 mm) and August the wettest (103 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
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

Zucchini in nearby cities

All the nearest cities on our list plant zucchini earlier than Ostrava; the closest date is in Katowice, 2 days earlier.

City	Distance	Date	Difference
Katowice	73 km	6 June – 30 August	2 days earlier
Olomouc	77 km	3 June – 20 August	5 days earlier
Zlín	79 km	6 June – 20 August	2 days earlier
Opole	97 km	2 June – 1 September	6 days earlier
Kraków	123 km	6 June – 15 August	2 days earlier
Częstochowa	126 km	5 June – 24 August	3 days earlier

Where to buy zucchini plants and seeds near Ostrava

Buy plants ready to set out from 8 June to 23 August (from 18 May to 23 August for an unheated greenhouse); seed for raising your own is sown from 27 April to 2 August. Within 15 km of Ostrava OpenStreetMap lists 10 garden centres, 1 farm-supply shop, 3 markets and 1 farm shop (collected 28 October 2026).

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
Park servis — garden centre
5 km · parkservis.cz

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