When to plant zucchini in Brno: 6 June – 20 August

In Brno, zucchini: sow for seedlings from 25 April to 30 July; plant into a greenhouse from 16 May to 20 August; plant out into open ground from 6 June to 20 August. For plants and seeds, the places nearby include Farmářská prodejna na Ráječku (farm shop, 4 km); addresses and opening hours are below.

Zucchini in Brno: soil, season and weather

In Brno the soil, not frost, sets the date: the last frost is over around 24 April, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 6 June, 43 days later.

Last spring frost	24 April
Top 7 cm of soil at 18 °C	6 June, 43 days after the last frost
First autumn frost	6 November, 153 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	12 July – 25 September
Days left for picking	117
Daylight	15:20 on 16 May, 16:04 on 6 June
Watering outdoors when fruiting (card)	every 3 days; the driest month, October, has 9 rainy days

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

Zucchini in Brno: care after planting

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

Pests and diseases of zucchini to watch for:

Weather in Brno during the zucchini season

About 382 mm of rain falls in the season; October is the driest month (44 mm) and September the wettest (83 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	24.2	13.6	71	11	16:12
July	25.5	14.9	69	11	15:51
August	25.5	15	70	9	14:27
September	20.4	11	83	10	12:39
October	14.3	6.4	44	9	10:52
November	7.4	1.7	45	9	9:10

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

Around Brno, Bratislava is 6 days earlier and Vienna 2 days later.

City	Distance	Date	Difference
Olomouc	63 km	3 June – 20 August	3 days earlier
Zlín	77 km	6 June – 20 August	same day
Pardubice	111 km	5 June – 24 August	1 day earlier
Vienna	111 km	8 June – 26 August	2 days later
Bratislava	122 km	31 May – 30 August	6 days earlier
Hradec Králové	126 km	7 June – 25 August	1 day later

Where to buy zucchini plants and seeds near Brno

Buy plants ready to set out from 6 June to 20 August (from 16 May to 20 August for an unheated greenhouse); seed for raising your own is sown from 25 April to 30 July. Within 15 km of Brno OpenStreetMap lists 15 garden centres, 3 farm-supply shops, 1 plant nursery, 6 markets and 7 farm shops (collected 28 October 2026).

Vinamo — market
Tue–Sun 09:00–19:00 · 3 km
Vinamo — market
Tue–Sun 09:00–19:00 · 4 km
náměstí Republiky — market
"Když jsou zrovna trhy" · 2 km
Farmářská prodejna na Ráječku — farm shop
Ráječek 2, 62000 Brno · Mon–Sat 08:00–18:00 · 4 km · farmarajecek.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