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Skarp-Salling
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Growing Season: Skarp-Salling

North Jutland, Denmark

Growing season

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 10 Jun
Daylight
10+ h
14+ h
10+ h
25 Feb
15 Apr
28 Aug
16 Oct
233 days
Frost-free
10% frost-free
10 Apr
4 Nov
90% frost risk
208 days
Effective
10 Apr
16 Oct
189 days

The growing season in Skarp-Salling is approximately 189 days and is limited by both frost and daylight.

Last spring frost

The last spring frost normally occurs on 10 Apr in Skarp-Salling. At the earliest, the last frost is over around 23 Mar and at the latest around 25 Apr.

Frost-free probabilityFrost-free prob. Date Grower's risk level Explanation
10% 23 Mar High risk Frost 9 out of 10 years after this date
25% 3 Apr Frost 3 out of 4 years after this date
50% 10 Apr Normal risk Frost every other year after this date
75% 20 Apr Frost 1 out of 4 years after this date
90% 25 Apr 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 Skarp-Salling that is 10 Apr. 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 4 Nov in Skarp-Salling. At the earliest, frost can arrive around 17 Oct and at the latest around 21 Nov.

Frost probabilityFrost prob. Date Grower's risk level Explanation
10% 17 Oct Low risk Frost 1 out of 10 years on or before this date
25% 28 Oct Frost 1 out of 4 years on or before this date
50% 4 Nov Normal risk Frost every other year on or before this date
75% 20 Nov Frost 3 out of 4 years on or before this date
90% 21 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 Skarp-Salling that is 4 Nov. 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 25 Feb 16 Oct 233
Persephone period 17 Oct 24 Feb 132
Plan the year's last sowing of cold-hardy plants in Skarp-Salling so they are approximately 75% mature by 17 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 25 Feb – 14 Apr 49 Grow long-day plants like spinach, lettuce and coriander.
Longer daylight 14+ h 15 Apr – 27 Aug 135 High risk of bolting
Shorter daylight 10-14 h 28 Aug – 16 Oct 50 Grow long-day plants