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Tidö-Lindö
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Growing Season: Tidö-Lindö

Västerås, Västmanland, Sweden
0.3°
Last 24h: Near frost recorded tonight at 05:00. Inspect for frost damage

Growing season

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 9 May
Daylight
10+ h
14+ h
10+ h
28 Feb
13 Apr
31 Aug
14 Oct
228 days
Frost-free
10% frost-free
5 May
12 Oct
90% frost risk
160 days
Effective
5 May
12 Oct
160 days

The growing season in Tidö-Lindö is approximately 160 days and is limited by frost.

Last spring frost

The last spring frost normally occurs on 5 May in Tidö-Lindö. At the earliest, the last frost is over around 26 Apr and at the latest around 13 May.

Frost-free probabilityFrost-free prob. Date Grower's risk level Explanation
10% 26 Apr High risk Frost 9 out of 10 years after this date
25% 30 Apr Frost 3 out of 4 years after this date
50% 5 May Normal risk Frost every other year after this date
75% 8 May Frost 1 out of 4 years after this date
90% 13 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 Tidö-Lindö that is 5 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 12 Oct in Tidö-Lindö. At the earliest, frost can arrive around 1 Oct and at the latest around 21 Oct.

Frost probabilityFrost prob. Date Grower's risk level Explanation
10% 1 Oct Low risk Frost 1 out of 10 years on or before this date
25% 3 Oct Frost 1 out of 4 years on or before this date
50% 12 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% 21 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 Tidö-Lindö that is 12 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 28 Feb 14 Oct 228
Persephone period 15 Oct 27 Feb 137
Plan the year's last sowing of cold-hardy plants in Tidö-Lindö so they are approximately 75% mature by 15 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 28 Feb – 12 Apr 44 Grow long-day plants like spinach, lettuce and coriander.
Longer daylight 14+ h 13 Apr – 30 Aug 140 High risk of bolting
Shorter daylight 10-14 h 31 Aug – 14 Oct 45 Grow long-day plants