During the term of seminary's gardeners K.M. Ståhlberg (1891-1908) and Kalle Kalervo (1909-10), practical teaching became permanent and regular. The general boom in horticulture in Finland at the turn of the century also played a role.
The main focus of horticultural education was largely on practical work, but the theoretical subjects taught included, for example, in 1906-07 the importance of gardening, the establishment of a garden, fertilizing and cultivating the land, fertilizer making and their chemistry, and the emergence of cultural crops. In the 1920s, natural history teaching topics are mentioned to have been such as plant structure, plant systems (tribes) and vital functions of plants.
Practical horticultural education gradually ceased in Jyväskylä in the 1960s when the university began its operations. The inventories of the plant collections of the University of Jyväskylä began in the 1970s and the collections were formed into a botanical garden in 1990. The collection includes approximately 18,000 plant specimens, the oldest of which have survived from the teachers' seminary in the 1880s.
In the picture from the 1930s, one of the most important memorial trees in Seminary Park that has survived to the present day: the Seminary Spruce (forest spruce), planted in memory of the teacher-seminary in 1937. At that time, the seminary was transformed into a matriculation-based educational college. The plaque reads: "Seminary fir, planted by the Seminary Fellowship and received by the Student Union of the School of Education". JYU Science Museum Collections K1759:31.