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Daunafjället
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Growing Season: Daunafjället

Vilhelmina, Västerbotten, Sweden
-2.9°
Slight frost tomorrow at 23:00. Frost temperatures between 05:00 – tomorrow 23:00. Bring in or cover sensitive plants
-1.5°
Last 24h: Slight frost recorded tonight at 01:00. Inspect for frost damage

Growing season

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 10 May
Daylight
10+ h
14+ h
10+ h
5 Mar
8 Apr
4 Sep
9 Oct
218 days
Frost-free
10% frost-free
15 Jun
15 Aug
90% frost risk
61 days
Effective
15 Jun
15 Aug
61 days

The growing season in Daunafjället is approximately 61 days and is limited by frost.

Last spring frost

The last spring frost normally occurs on 15 Jun in Daunafjället. At the earliest, the last frost is over around 30 May and at the latest around 29 Jun.

Frost-free probabilityFrost-free prob. Date Grower's risk level Explanation
10% 30 May High risk Frost 9 out of 10 years after this date
25% 9 Jun Frost 3 out of 4 years after this date
50% 15 Jun Normal risk Frost every other year after this date
75% 23 Jun Frost 1 out of 4 years after this date
90% 29 Jun 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 Daunafjället that is 15 Jun. 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 15 Aug in Daunafjället. At the earliest, frost can arrive around 6 Jul and at the latest around 12 Sep.

Frost probabilityFrost prob. Date Grower's risk level Explanation
10% 6 Jul Low risk Frost 1 out of 10 years on or before this date
25% 27 Jul Frost 1 out of 4 years on or before this date
50% 15 Aug Normal risk Frost every other year on or before this date
75% 29 Aug Frost 3 out of 4 years on or before this date
90% 12 Sep 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 Daunafjället that is 15 Aug. 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 5 Mar 9 Oct 218
Persephone period 10 Oct 4 Mar 147
Plan the year's last sowing of cold-hardy plants in Daunafjället so they are approximately 75% mature by 10 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 5 Mar – 7 Apr 34 Grow long-day plants like spinach, lettuce and coriander.
Longer daylight 14+ h 8 Apr – 3 Sep 149 High risk of bolting
Shorter daylight 10-14 h 4 Sep – 9 Oct 36 Grow long-day plants