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Å-Højrup
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Growing Season: Å-Højrup

South Denmark, Denmark

Growing season

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 9 Jun
Daylight
10+ h
14+ h
10+ h
24 Feb
17 Apr
27 Aug
17 Oct
235 days
Frost-free
10% frost-free
4 Apr
19 Nov
90% frost risk
229 days
Effective
4 Apr
17 Oct
196 days

The growing season in Å-Højrup is approximately 196 days and is limited by both frost and daylight.

Last spring frost

The last spring frost normally occurs on 4 Apr in Å-Højrup. At the earliest, the last frost is over around 29 Mar and at the latest around 26 Apr.

Frost-free probabilityFrost-free prob. Date Grower's risk level Explanation
10% 29 Mar High risk Frost 9 out of 10 years after this date
25% 1 Apr Frost 3 out of 4 years after this date
50% 4 Apr Normal risk Frost every other year after this date
75% 16 Apr Frost 1 out of 4 years after this date
90% 26 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 Å-Højrup that is 4 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 19 Nov in Å-Højrup. At the earliest, frost can arrive around 21 Oct and at the latest around 30 Nov.

Frost probabilityFrost prob. Date Grower's risk level Explanation
10% 21 Oct Low risk Frost 1 out of 10 years on or before this date
25% 31 Oct Frost 1 out of 4 years on or before this date
50% 19 Nov Normal risk Frost every other year on or before this date
75% 26 Nov Frost 3 out of 4 years on or before this date
90% 30 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 Å-Højrup that is 19 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 24 Feb 17 Oct 235
Persephone period 18 Oct 23 Feb 130
Plan the year's last sowing of cold-hardy plants in Å-Højrup so they are approximately 75% mature by 18 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 24 Feb – 16 Apr 52 Grow long-day plants like spinach, lettuce and coriander.
Longer daylight 14+ h 17 Apr – 26 Aug 132 High risk of bolting
Shorter daylight 10-14 h 27 Aug – 17 Oct 52 Grow long-day plants