Last and first frost dates in Brno

When is the last frost in Brno?

The last frost in Brno usually comes around 24 April: that is the median of 2016–2025, so in about half of those years the last night at or below 0 °C came later. Hardy crops start before it and frost-tender ones only after it: in the table below arugula can go into open ground from 3 April, while corn waits until 1 May. The first autumn frost follows around 6 November, about 196 days later: harvest or cover frost-tender crops before then.

When to sow and plant

Planting out: a week after the last frost once the soil is warm enough for the crop; frost-hardy crops three weeks before it; an unheated greenhouse three weeks earlier. Seedlings are sown so they are ready on that day. 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.

When the soil warms up in Brno

The day the top 7 cm of soil first averages each temperature over a week, median of 2016–2025 (ERA5 via Open-Meteo). The soil reaches 10 °C 10 days before the last spring frost and 15 °C 32 days after it.

Frost dates near Brno

Of the nearest cities on our list, the last spring frost ends earliest in Vienna (7 April) and latest in Jihlava (27 April).

Seeds, seedlings and markets in Brno

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). The nearest garden centre to the city centre is Zahradnictví u Mašků, 3 km away.

• Zahradnictví u Mašků — garden centre
  Mar–Oct Mon–Fri 08:00–18:00; Nov, Dec, Jan, Feb Mon–Fri 08:00–17:00; Sat 08:00–12:00; Sun, public holidays closed · 3 km · zahradnictvi-u-masku.cz
• od-farmare.cz — farm supply
  Merhautova 63, 61300 Brno · Mon–Fri 10:00–18:00 · 1 km · od-farmare.cz
• Tržnice Brno — market
  Mon–Fri 07:00–19:00; Sat 07:00–13:00 · 1 km
• Ovoce zelenina potraviny — farm shop
  Mon–Fri 06:00–17:00; Sat, Sun 11:00–16:00 · 1 km
• Zahradnictví Julíánov — garden centre
  Mon–Fri 08:00–18:00; Sat 08:00–12:00 · 4 km · facebook.com
• ELITA semenářská, a.s. — farm supply
  Ořechov ev.124, 66444 Ořechov · 13 km

• Where to buy seeds and seedlings in Brno
• Selling your own harvest in Czechia

Places: © OpenStreetMap contributors, ODbL.

Weather in Brno by month

Average weather in Brno over 2016–2025: the warmest month is July. Months that average 20 °C or more by day: June–September (20.4–25.5 °C). Nights average below 0 °C in January (-3.4 °C), February (-1.7 °C) and December (-1.4 °C). About 641 mm of rain falls in a year, on 117 days; September is the wettest month (83 mm) and February the driest (32 mm).

Average of the daily highs and lows, rain per month and days with at least 1 mm (ERA5 via Open-Meteo, the same grid cell as the frost dates).

Planted in autumn

From a month before the first autumn frost, so the roots grow before winter, to the late-planting limit on each crop’s page (about two weeks before the ground freezes, by ten years of weather).