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 |
|---|---|---|---|
| Bell Pepper | 21 February | 6 May | 27 May |
| Chili Pepper | 28 February | 13 May | 3 June |
| Corn | — | 22 March | sow 12 April |
| Cucumber | 25 March | 6 May | 27 May |
| Eggplant | 25 February | 6 May | 27 May |
| Green Beans | 13 February | 22 March | 12 April |
| Melon | 15 March | 6 May | 27 May |
| Peas | — | 12 February | sow 5 March |
| Physalis | 25 February | 11 April | 2 May |
| Pumpkin | 5 March | 11 April | 2 May |
| Sweet Corn | — | 22 March | sow 12 April |
| Tomato | 13 February | 11 April | 2 May |
| Watermelon | 4 April | 6 May | 27 May |
| 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 |
|---|---|
| Crocus | 26 October |
| Daffodil | 26 October |
| Garlic | 26 October |
| Hyacinth | 26 October |
| Lily | 26 October |
| Tulip | 26 October |
A month before the first autumn frost, so the roots grow before winter.