GreenlyLyon: frost dates
France
In Lyon the last spring frost usually comes around 26 March and the first autumn frost around 25 November, which leaves about 244 frost-free days (median of 2016–2025). Tomato seedlings can go into open ground around 2 May.
| Last spring frost | around 26 March |
|---|---|
| First autumn frost | around 25 November |
| Frost-free days | 244 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 | 31 January | 12 March | 2 April |
| Arugula | — | 12 February | sow 5 March |
| Basil | 29 March | 6 May | 27 May |
| Beet | — | 12 February | sow 5 March |
| Bell Pepper | 21 February | 6 May | 27 May |
| Black-eyed Susan | 30 January | — | 2 April |
| Bok Choy | 5 February | 12 March | 2 April |
| Broad bean | — | 12 February | sow 5 March |
| Broccoli | — | 12 February | sow 5 March |
| Brussels Sprouts | 29 December | 12 February | 5 March |
| Cabbage | — | 12 February | sow 5 March |
| Calendula | — | 12 February | sow 5 March |
| Carrot | — | — | sow 5 March |
| Cauliflower | 1 January | 12 February | 5 March |
| Celeriac | 25 December | 12 March | 2 April |
| Celery | 25 December | 12 March | 2 April |
| Celosia | 8 March | 22 April | 13 May |
| Chamomile | — | 12 February | sow 5 March |
| Chayote | 24 December | 22 March | 12 April |
| Chickpea | — | — | sow 5 March |
| Chili Pepper | 28 February | 13 May | 3 June |
| China aster | 15 March | 6 May | 27 May |
| Chives | — | — | sow 5 March |
| Cilantro | — | 12 February | sow 5 March |
| Corn | — | 22 March | sow 12 April |
| Cosmos | 8 March | 22 April | 13 May |
| Cucumber | 25 March | 6 May | 27 May |
| Daikon | — | 12 February | sow 5 March |
| Delphinium | 5 January | — | 5 March |
| Dill | — | 12 February | sow 5 March |
| Eggplant | 25 February | 6 May | 27 May |
| Florence fennel | 26 January | 12 March | 2 April |
| Garden sorrel | — | 12 February | sow 5 March |
| Green Beans | 13 February | 22 March | 12 April |
| Hyssop | — | — | sow 5 March |
| Kale | — | 12 February | sow 5 March |
| Kiwano | 10 March | 11 April | 2 May |
| Kohlrabi | — | 12 February | sow 5 March |
| Leek | 4 December | 12 February | 5 March |
| Lemon balm | — | 12 February | sow 5 March |
| Lettuce | — | 12 February | sow 5 March |
| Lisianthus | 17 November | 12 February | 5 March |
| Lovage | — | — | sow 5 March |
| Luffa | 25 March | 6 May | 27 May |
| Marigold | 29 January | 12 March | 2 April |
| Melon | 15 March | 6 May | 27 May |
| Microgreens | — | 22 April | sow 13 May |
| Moringa | 19 March | 13 May | 3 June |
| Mustard greens | — | 12 February | sow 5 March |
| Napa cabbage | 7 February | 12 March | 2 April |
| Nasturtium | 2 February | 12 March | 2 April |
| Okra | 25 March | 6 May | 27 May |
| Oregano | 14 December | 12 February | 5 March |
| Pansy | 18 December | 12 February | 5 March |
| Parsley | — | 12 February | sow 5 March |
| Parsnip | — | — | sow 5 March |
| Peanut | 30 March | 6 May | 27 May |
| Peas | — | 12 February | sow 5 March |
| Petunia | 4 March | 6 May | 27 May |
| Physalis | 25 February | 11 April | 2 May |
| Pumpkin | 5 March | 11 April | 2 May |
| Purple coneflower | 2 January | — | 5 March |
| Radish | — | — | sow 5 March |
| Sage | 25 December | 12 February | 5 March |
| Snapdragon | 9 December | 12 February | 5 March |
| Spinach | — | 12 February | sow 5 March |
| Stevia | 21 February | 11 April | 2 May |
| Stock | — | 12 February | sow 5 March |
| Sunflower | — | 22 April | sow 13 May |
| Sweet Corn | — | 22 March | sow 12 April |
| Sweet pea | 1 January | 12 February | 5 March |
| Sweet William | — | — | sow 5 March |
| Swiss Chard | — | 12 February | sow 5 March |
| Thyme | — | 12 February | sow 5 March |
| Tomato | 13 February | 11 April | 2 May |
| Turnip | — | 12 February | sow 5 March |
| Watercress | — | 12 February | sow 5 March |
| Watermelon | 4 April | 6 May | 27 May |
| Zinnia | 8 April | 13 May | 3 June |
| Zucchini | 10 March | 11 April | 2 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.
Lyon: weather for the next 7 days
Forecast by Open-Meteo. Nights at or below 0 °C are marked as frost.
Planted in autumn
| Crop | Plant around |
|---|---|
| Bearded Iris | 26 October |
| Crocus | 26 October |
| Daffodil | 26 October |
| Garlic | 26 October |
| Hyacinth | 26 October |
| Lily | 26 October |
| Peony | 26 October |
| Saffron | 26 October |
| Tulip | 26 October |
| Wild garlic | 26 October |
A month before the first autumn frost, so the roots grow before winter.