Greenly

Stockholm: frost dates

Sweden

In Stockholm the last spring frost usually comes around 5 May and the first autumn frost around 28 October, which leaves about 176 frost-free days (median of 2016–2025). Tomato seedlings can go into open ground around 7 June.

Last spring frostaround 5 May
First autumn frostaround 28 October
Frost-free days176 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

CropSow for seedlingsPlant out in a greenhouseOpen ground
Bell Pepper17 March30 May20 June
Chili Pepper4 April17 June8 July
Corn—29 Aprilsow 20 May
Cucumber18 April30 May20 June
Eggplant21 March30 May20 June
Green Beans23 March29 April20 May
Melon8 April30 May20 June
Peas—24 Marchsow 14 April
Physalis2 April17 May7 June
Pumpkin10 April17 May7 June
Sweet Corn—29 Aprilsow 20 May
Tomato21 March17 May7 June
Watermelon28 April30 May20 June
Zucchini15 April17 May7 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

CropPlant around
Crocus28 September
Daffodil28 September
Garlic28 September
Hyacinth28 September
Lily28 September
Tulip28 September

A month before the first autumn frost, so the roots grow before winter.