GreenlyPrague: frost dates
Czechia
In Prague the last spring frost usually comes around 20 April and the first autumn frost around 8 November, which leaves about 202 frost-free days (median of 2016–2025). Tomato seedlings can go into open ground around 12 May.
| Last spring frost | around 20 April |
|---|---|
| First autumn frost | around 8 November |
| Frost-free days | 202 days |
Median of 2016–2025 for the 25 km grid cell of the city: the last day at or below 0 °C in spring and the first in autumn (ERA5 reanalysis via Open-Meteo). In a cold year a frost can come a week or two later — Greenly warns 48 hours ahead.
When to sow and plant
| Crop | Sow for seedlings | Plant out in a greenhouse | Open ground |
|---|---|---|---|
| Achocha | 25 February | 6 April | 27 April |
| Arugula | — | 9 March | sow 30 March |
| Basil | 5 April | 13 May | 3 June |
| Beet | — | 9 March | sow 30 March |
| Bell Pepper | 28 February | 13 May | 3 June |
| Black-eyed Susan | 24 February | — | 27 April |
| Bok Choy | 2 March | 6 April | 27 April |
| Broad bean | — | 9 March | sow 30 March |
| Broccoli | — | 9 March | sow 30 March |
| Brussels Sprouts | 23 January | 9 March | 30 March |
| Cabbage | — | 9 March | sow 30 March |
| Calendula | — | 9 March | sow 30 March |
| Carrot | — | — | sow 30 March |
| Cauliflower | 26 January | 9 March | 30 March |
| Celeriac | 19 January | 6 April | 27 April |
| Celery | 19 January | 6 April | 27 April |
| Celosia | 17 March | 1 May | 22 May |
| Chamomile | — | 9 March | sow 30 March |
| Chayote | 8 January | 6 April | 27 April |
| Chickpea | — | — | sow 30 March |
| Chili Pepper | 4 March | 17 May | 7 June |
| China aster | 22 March | 13 May | 3 June |
| Chives | — | — | sow 30 March |
| Cilantro | — | 9 March | sow 30 March |
| Corn | — | 6 April | sow 27 April |
| Cosmos | 17 March | 1 May | 22 May |
| Cucumber | 1 April | 13 May | 3 June |
| Daikon | — | 9 March | sow 30 March |
| Delphinium | 30 January | — | 30 March |
| Dill | — | 9 March | sow 30 March |
| Eggplant | 4 March | 13 May | 3 June |
| Florence fennel | 20 February | 6 April | 27 April |
| Garden sorrel | — | 9 March | sow 30 March |
| Green Beans | 28 February | 6 April | 27 April |
| Hyssop | — | — | sow 30 March |
| Kale | — | 9 March | sow 30 March |
| Kiwano | 20 March | 21 April | 12 May |
| Kohlrabi | — | 9 March | sow 30 March |
| Leek | 29 December | 9 March | 30 March |
| Lemon balm | — | 9 March | sow 30 March |
| Lettuce | — | 9 March | sow 30 March |
| Lisianthus | 12 December | 9 March | 30 March |
| Lovage | — | — | sow 30 March |
| Luffa | 1 April | 13 May | 3 June |
| Marigold | 23 February | 6 April | 27 April |
| Melon | 22 March | 13 May | 3 June |
| Microgreens | — | 1 May | sow 22 May |
| Moringa | 23 March | 17 May | 7 June |
| Mustard greens | — | 9 March | sow 30 March |
| Napa cabbage | 4 March | 6 April | 27 April |
| Nasturtium | 27 February | 6 April | 27 April |
| Okra | 1 April | 13 May | 3 June |
| Oregano | 8 January | 9 March | 30 March |
| Pansy | 12 January | 9 March | 30 March |
| Parsley | — | 9 March | sow 30 March |
| Parsnip | — | — | sow 30 March |
| Peanut | 6 April | 13 May | 3 June |
| Peas | — | 9 March | sow 30 March |
| Petunia | 11 March | 13 May | 3 June |
| Physalis | 7 March | 21 April | 12 May |
| Pumpkin | 15 March | 21 April | 12 May |
| Purple coneflower | 27 January | — | 30 March |
| Radish | — | — | sow 30 March |
| Sage | 19 January | 9 March | 30 March |
| Snapdragon | 3 January | 9 March | 30 March |
| Spinach | — | 9 March | sow 30 March |
| Stevia | 3 March | 21 April | 12 May |
| Stock | — | 9 March | sow 30 March |
| Sunflower | — | 1 May | sow 22 May |
| Sweet Corn | — | 6 April | sow 27 April |
| Sweet pea | 26 January | 9 March | 30 March |
| Sweet William | — | — | sow 30 March |
| Swiss Chard | — | 9 March | sow 30 March |
| Thyme | — | 9 March | sow 30 March |
| Tomato | 23 February | 21 April | 12 May |
| Turnip | — | 9 March | sow 30 March |
| Watercress | — | 9 March | sow 30 March |
| Watermelon | 11 April | 13 May | 3 June |
| Zinnia | 12 April | 17 May | 7 June |
| Zucchini | 20 March | 21 April | 12 May |
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.
Prague: weather for the next 7 days
Forecast by Open-Meteo. Nights at or below 0 °C are marked as frost.
Weather in Prague by month
Average weather in Prague over 2016–2025: the warmest month is July, the wettest August.
| Month | Day, °C | Night, °C | Rain, mm | Rainy days |
|---|---|---|---|---|
| January | 3.6 | -2.3 | 41 | 12 |
| February | 6.2 | -1.2 | 42 | 10 |
| March | 10 | 0.8 | 37 | 9 |
| April | 14.7 | 4.3 | 43 | 10 |
| May | 19.1 | 8.8 | 67 | 12 |
| June | 24.6 | 14 | 75 | 12 |
| July | 25.6 | 15.2 | 72 | 12 |
| August | 25.4 | 15 | 78 | 11 |
| September | 20.7 | 11.2 | 65 | 10 |
| October | 15 | 7 | 54 | 11 |
| November | 7.8 | 1.8 | 43 | 10 |
| December | 4.6 | -0.4 | 48 | 11 |
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
| Crop | Plant around |
|---|---|
| Bearded Iris | 9 October |
| Crocus | 9 October |
| Daffodil | 9 October |
| Garlic | 9 October |
| Hyacinth | 9 October |
| Lily | 9 October |
| Peony | 9 October |
| Saffron | 9 October |
| Tulip | 9 October |
| Wild garlic | 9 October |
A month before the first autumn frost, so the roots grow before winter.