Phenology studies the occurrence of seasonal events in nature, e.g. the blooming of flowering plants, the ripening of fruit, bird migrations, and similar events. The timing of these occurrences varies with year and location. By selecting certain events as reference points it is possible to create a phenological calendar.
This calendar has ten seasons, with dates specified according to the multi-year average in Germany.
The seasons can be browsed by clicking on the buttons below.