Finland is one of the best areas in the world for tree growth. It belongs to the cold climatic belt in which sub-zero winters alternate with warm summers. The summer season lasts only 100 days, during which the trees grow. The short growing season means slow growth.
The slow growth provides the best possible straight-grained timber: branches are few, and those that exist are small. Growth is symmetrical and trunks are straight and round. Growth rings are thin and tightly-packed. The amount of juvenile wood is small and heartwood great. The result is a hard, tough and straight-grained timber with low internal tension and a few cracks. The low-resinous, evenly patterned Finnish wood is first-class material for many purposes.