Gardening in Czechia: climate, frost dates and crops by region

Climate zones of Czechia

By the days between the last spring frost and the first autumn frost.

How the regions of Czechia differ

The gap between the warmest month’s days and the coldest month’s nights is widest in Olomouc (29.2 °C) and smallest in Ústí nad Labem (25.7 °C): the smaller it is, the milder both winter and summer. Liberec is the wettest of these cities with 899 mm a year, Most the driest with 574 mm. The hottest summer days are in Olomouc (26.3 °C on average in the warmest month), the coolest in Ústí nad Labem (22.2 °C). In all 20 cities at least one month averages below 0 °C at night; the longest such winter is in Děčín (December–March).

Which crops suit which part of Czechia

Season long enough: the days from planting to the first autumn frost cover the days to the first harvest on the plant card. 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.

Cities of Czechia: weather in numbers

ERA5 2016–2025 via Open-Meteo, 25 km grid cell of each city; dates by the Greenly calendar and the plant cards.

More about Czechia

• Czechia: frost dates by city
• Selling your harvest in Czechia
• Where to buy seeds and plants
• When to plant tomatoes in Czechia
• When to plant cucumbers in Czechia
• When to plant peas in Czechia
• When to plant garlic in Czechia
• Gardening by country