GreenlyEdinburgh: frost dates
United Kingdom
| Last spring frost | around 28 April |
|---|---|
| First autumn frost | around 9 November |
| Frost-free days | 195 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 | 2 April | 15 June | 6 July |
| Chili Pepper | 15 April | 28 June | 19 July |
| Corn | — | 20 April | sow 11 May |
| Cucumber | 4 May | 15 June | 6 July |
| Eggplant | 6 April | 15 June | 6 July |
| Green Beans | 14 March | 20 April | 11 May |
| Melon | 24 April | 15 June | 6 July |
| Peas | — | 17 March | sow 7 April |
| Physalis | 29 March | 13 May | 3 June |
| Pumpkin | 6 April | 13 May | 3 June |
| Sweet Corn | — | 20 April | sow 11 May |
| Tomato | 17 March | 13 May | 3 June |
| Watermelon | 14 May | 15 June | 6 July |
| Zucchini | 11 April | 13 May | 3 June |
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.
Planted in autumn
| Crop | Plant around |
|---|---|
| Crocus | 10 October |
| Daffodil | 10 October |
| Garlic | 10 October |
| Hyacinth | 10 October |
| Lily | 10 October |
| Tulip | 10 October |
A month before the first autumn frost, so the roots grow before winter.