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Gullspång
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Growing Season: Gullspång

Gullspång, Västra Götaland, Sweden

Growing season

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 9 May
Daylight
10+ h
14+ h
10+ h
27 Feb
13 Apr
30 Aug
14 Oct
229 days
Frost-free
10% frost-free
3 May
12 Oct
90% frost risk
162 days
Effective
3 May
12 Oct
162 days

The growing season in Gullspång is approximately 162 days and is limited by frost.

Last spring frost

The last spring frost normally occurs on 3 May in Gullspång. At the earliest, the last frost is over around 22 Apr and at the latest around 10 May.

Frost-free probabilityFrost-free prob. Date Grower's risk level Explanation
10% 22 Apr High risk Frost 9 out of 10 years after this date
25% 27 Apr Frost 3 out of 4 years after this date
50% 3 May Normal risk Frost every other year after this date
75% 7 May Frost 1 out of 4 years after this date
90% 10 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 Gullspång 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 12 Oct in Gullspång. At the earliest, frost can arrive around 30 Sep and at the latest around 4 Nov.

Frost probabilityFrost prob. Date Grower's risk level Explanation
10% 30 Sep Low risk Frost 1 out of 10 years on or before this date
25% 7 Oct Frost 1 out of 4 years on or before this date
50% 12 Oct Normal risk Frost every other year on or before this date
75% 16 Oct Frost 3 out of 4 years on or before this date
90% 4 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 Gullspång that is 12 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 27 Feb 14 Oct 229
Persephone period 15 Oct 26 Feb 136
Plan the year's last sowing of cold-hardy plants in Gullspång so they are approximately 75% mature by 15 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 27 Feb – 12 Apr 45 Grow long-day plants like spinach, lettuce and coriander.
Longer daylight 14+ h 13 Apr – 29 Aug 139 High risk of bolting
Shorter daylight 10-14 h 30 Aug – 14 Oct 46 Grow long-day plants