A continuous forest data set of 579 forest and peatland plots around the Hyytiälä Forest Station in southern Finland (61° 50′ N, 24° 17′ E). The majority of the plots were established for educational purposes to demonstrate the functioning of forests and peatlands as an ecosystem, their structure, growth, development, and different management practices. Some plots have been used for forest and peatland research works. The dataset includes information such as species, volume, number of stems, basal area and site fertility class per plot. The dataset also includes templates for future data collection, which can later be incorporated into the dataset.