Education
He graduated from the University of Tartu in 1926.
He graduated from the University of Tartu in 1926.
From 1927 to 1929 Portuguese complemented his gardening knowledge in Germany. Between 1930 and 1937 he worked as the prime gardener in the Botanical Garden of the University of Tartu. In 1932 he received the Doctor of Philosophy in botany.
Later 1937–1940 Portuguese served as the director of Tartu Teachers Seminar.
Notable publications include Iluaiad ja kodu ümbruse kaunistus (1933), Aianduse õpperaamat (1940) and Ehisaiandus (1949)
Jaan port is buried at the Tartu Maarja cemetery (part of Raadi cemetery).