 When Alströmer experienced financial losses in 1785 and moved to his estate at Gåsevadsholm, outside Kungsbacka, Dahl followed.In 1786, an honorary Doctorate of Medicine was conferred on Dahl in Kiel, Germany, and the following year he became associate professor at the Academy of Åbo in Turku (today's University of Helsinki), teaching medicine and botany.He brought his personal herbarium to Turku, which later was destroyed in the historic fire of 1827.