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Klövsjö
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Growing Season: Klövsjö

Berg, Jämtland, Sweden
-1.4°
Slight frost tonight at 05:00. Frost temperatures between 22:00 – tomorrow 06:00. Bring in or cover sensitive plants

Growing season

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 10 May
Daylight
10+ h
14+ h
10+ h
3 Mar
10 Apr
2 Sep
11 Oct
222 days
Frost-free
10% frost-free
3 Jun
9 Sep
90% frost risk
98 days
Effective
3 Jun
9 Sep
98 days

The growing season in Klövsjö is approximately 98 days and is limited by frost.

Last spring frost

The last spring frost normally occurs on 3 Jun in Klövsjö. At the earliest, the last frost is over around 19 May and at the latest around 15 Jun.

Frost-free probabilityFrost-free prob. Date Grower's risk level Explanation
10% 19 May High risk Frost 9 out of 10 years after this date
25% 28 May Frost 3 out of 4 years after this date
50% 3 Jun Normal risk Frost every other year after this date
75% 6 Jun Frost 1 out of 4 years after this date
90% 15 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 Klövsjö that is 3 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 9 Sep in Klövsjö. At the earliest, frost can arrive around 13 Jul and at the latest around 22 Sep.

Frost probabilityFrost prob. Date Grower's risk level Explanation
10% 13 Jul Low risk Frost 1 out of 10 years on or before this date
25% 25 Aug Frost 1 out of 4 years on or before this date
50% 9 Sep Normal risk Frost every other year on or before this date
75% 18 Sep Frost 3 out of 4 years on or before this date
90% 22 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 Klövsjö that is 9 Sep. 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 3 Mar 11 Oct 222
Persephone period 12 Oct 2 Mar 143
Plan the year's last sowing of cold-hardy plants in Klövsjö so they are approximately 75% mature by 12 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 3 Mar – 9 Apr 38 Grow long-day plants like spinach, lettuce and coriander.
Longer daylight 14+ h 10 Apr – 1 Sep 145 High risk of bolting
Shorter daylight 10-14 h 2 Sep – 11 Oct 40 Grow long-day plants