Stratification means layering and with the stratification of seeds, we try to imitate the processes a seed would go through if it were lying on a forest floor and to secure more even germination.

Today, the majority of seeds are stratified either in boxes or in barrels, as this makes it easier to control the water content, handling, quantity, etc.

Nordmann fir seeds must lie moist and cold and cannot germinate until the water content is at least 33-34%. The lifting (Stratification) period for these seeds is between 6 – 12 weeks, at 2-4 degrees Celsius depending on the nature of the seeds – after this, the seeds are ready to go into the seedbeds. For other tree species, this process can take 1-2 years.

However, by using another method where the seed is fully moistened to 40-45%, it will, on the other hand, germinate significantly faster. Therefore, there are several factors to consider when choosing your stratification method. 

At Majland we use both methods, and we are constantly working to improve the results even more to improve seedling quality.