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Gamvik
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Growing Season: Gamvik

Gamvik, Finnmark, Norway

Growing season

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2 Jul
Daylight
10+ h
14+ h
10+ h
10 Mar
4 Apr
9 Sep
4 Oct
208 days
Frost-free
10% frost-free
7 May
14 Oct
90% frost risk
160 days
Effective
7 May
4 Oct
150 days

The growing season in Gamvik is approximately 150 days and is limited by both frost and daylight.

Last spring frost

The last spring frost normally occurs on 7 May in Gamvik. At the earliest, the last frost is over around 2 May and at the latest around 22 May.

Frost-free probabilityFrost-free prob. Date Grower's risk level Explanation
10% 2 May High risk Frost 9 out of 10 years after this date
25% 5 May Frost 3 out of 4 years after this date
50% 7 May Normal risk Frost every other year after this date
75% 17 May Frost 1 out of 4 years after this date
90% 22 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 Gamvik that is 7 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 14 Oct in Gamvik. At the earliest, frost can arrive around 5 Oct and at the latest around 22 Oct.

Frost probabilityFrost prob. Date Grower's risk level Explanation
10% 5 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% 14 Oct Normal risk Frost every other year on or before this date
75% 20 Oct Frost 3 out of 4 years on or before this date
90% 22 Oct 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 Gamvik that is 14 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 10 Mar 4 Oct 208
Persephone period 5 Oct 9 Mar 157
Plan the year's last sowing of cold-hardy plants in Gamvik so they are approximately 75% mature by 5 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 10 Mar – 3 Apr 25 Grow long-day plants like spinach, lettuce and coriander.
Longer daylight 14+ h 4 Apr – 8 Sep 158 High risk of bolting
Shorter daylight 10-14 h 9 Sep – 4 Oct 26 Grow long-day plants