Growing Season
The time when plants are most active is called the growing season and is usually defined as the part of the year when the average temperature exceeds a certain level. The relevant critical temperature level varies for different types of plants, but one value often used in both agriculture and forestry is +5 C. Following this definition, the length of the growing season varies from just over 200 days on the west and south coasts and on �land, to only about 100 days in northernmost Lapland.