He graduated from the University of Ljubljana in 1925 and taught in secondary schools in Otočac, Kranj and Ljubljana.
During the Second World War he was interred in the Gonars concentration camp. After the war he continued to teach and also worked at the Natural History Museum of Slovenia. He retired in 1962. He died in Ljubljana in 1992.
In 2001 a bronze bust to Planina was unveiled in Škofja Loka.