Hortuli

Search for your location to see a personalised planting calendar, frost dates and more.

Log in
Svenska
English
Dansk
Krabbgrundet
Create your calendar
Create your calendar

Growing Season: Krabbgrundet

Västerbotten, Sweden

Growing season

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

The growing season in Krabbgrundet is approximately 156 days and is limited by both frost and daylight.

Last spring frost

The last spring frost normally occurs on 6 May in Krabbgrundet. At the earliest, the last frost is over around 30 Apr and at the latest around 17 May.

Frost-free probabilityFrost-free prob. Date Grower's risk level Explanation
10% 30 Apr High risk Frost 9 out of 10 years after this date
25% 3 May Frost 3 out of 4 years after this date
50% 6 May Normal risk Frost every other year after this date
75% 9 May Frost 1 out of 4 years after this date
90% 17 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 Krabbgrundet that is 6 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 13 Oct in Krabbgrundet. At the earliest, frost can arrive around 4 Oct and at the latest around 20 Oct.

Frost probabilityFrost prob. Date Grower's risk level Explanation
10% 4 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% 13 Oct Normal risk Frost every other year on or before this date
75% 18 Oct Frost 3 out of 4 years on or before this date
90% 20 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 Krabbgrundet that is 13 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 5 Mar 9 Oct 218
Persephone period 10 Oct 4 Mar 147
Plan the year's last sowing of cold-hardy plants in Krabbgrundet 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