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Gunnared
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Growing Season: Gunnared

Göteborg, Västra Götaland, Sweden
-0.8°
Last 24h: Slight frost recorded this morning at 06:00. Inspect for frost damage
No frost in sight Last frost normally in 12 days (3 May), but frost-free in the forecast.

Growing season

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 21 Apr
Daylight
10+ h
14+ h
10+ h
26 Feb
14 Apr
29 Aug
15 Oct
231 days
Frost-free
10% frost-free
3 May
13 Oct
90% frost risk
163 days
Effective
3 May
13 Oct
163 days

The growing season in Gunnared is approximately 163 days and is limited by frost.

Last spring frost

The last spring frost normally occurs on 3 May in Gunnared. At the earliest, the last frost is over around 15 Apr and at the latest around 14 May.

Frost-free probabilityFrost-free prob. Date Grower's risk level Explanation
10% 15 Apr High risk Frost 9 out of 10 years after this date
25% 23 Apr Frost 3 out of 4 years after this date
50% 3 May Normal risk Frost every other year after this date
75% 6 May Frost 1 out of 4 years after this date
90% 14 May Low risk Frost 1 out of 10 years after this date
Growing is often planned around the date when there is a 50% probability that the last spring frost has occurred. In Gunnared that is 3 May. If you want lower frost risk, choose 75% or 90%, i.e. a later date.

First autumn frost

The first autumn frost normally occurs on 13 Oct in Gunnared. At the earliest, frost can arrive around 3 Oct and at the latest around 19 Nov.

Frost probabilityFrost prob. Date Grower's risk level Explanation
10% 3 Oct Low risk Frost 1 out of 10 years on or before this date
25% 9 Oct Frost 1 out of 4 years on or before this date
50% 13 Oct Normal risk Frost every other year on or before this date
75% 30 Oct Frost 3 out of 4 years on or before this date
90% 19 Nov High risk Frost 9 out of 10 years on or before this date
Growing is often planned around the date when there is a 50% probability that the first autumn frost has occurred. In Gunnared that is 13 Oct. If you want lower frost risk, choose 10% or 25%, i.e. an earlier date.

Daylight & Persephone Period

Plants need at least 10 hours of daylight to grow actively. The period with under 10 h is called the Persephone period.

From To Number of days
Daylight over 10 h 26 Feb 15 Oct 231
Persephone period 16 Oct 25 Feb 134
Plan the year's last sowing of cold-hardy plants in Gunnared so they are approximately 75% mature by 16 Oct when daylight drops below 10 h and growth starts to slow.

Daylight periods

Long-day plants like lettuce, spinach and coriander bolt when daylight gets too long. Plan sowing and harvest during periods when daylight is shorter (10-14 h). Early spring or late summer sowing gives the best results.

Season Light Period Days Advice
Shorter daylight 10-14 h 26 Feb – 13 Apr 47 Grow long-day plants like spinach, lettuce and coriander.
Longer daylight 14+ h 14 Apr – 28 Aug 137 High risk of bolting
Shorter daylight 10-14 h 29 Aug – 15 Oct 48 Grow long-day plants