What is the ideal humidity condition for the germination phase?

The germination phase of grains, such as barley, is critical in the brewing process as it initiates the conversion of starches into sugars, which are essential for fermentation. During germination, seeds require a high humidity level to activate enzymatic processes, take up water, and facilitate the growth of the seedling.

A humidity level of 95% is ideal during this stage because it creates an optimum environment for the seeds to absorb moisture without being submerged in water. This high humidity level ensures that the grains remain moist enough to promote enzyme activity and encourage sprouting while also preventing the grains from drying out.

At this humidity level, the respiration rate in the grains increases, supporting the metabolic processes necessary for germination. This environment contributes to the generation of sugars and proteins that are crucial for the development of malt, which is vital for brewing. Lower humidity levels may not provide sufficient moisture for effective germination, while excessively high humidity could lead to issues like fungal growth or inadequate air circulation, potentially harming the seed's development.