Upon his arrival in Mandatory Palestine, and as a dedicated Zionist, Blum started paintings scenes of everyday life and landscapes in Israel. He did many paintings of Jerusalem (including the Western Wall and the Mount of Olives), Tel Aviv, the Sea of Galilee and the Judaean Mountains. Additionally, he painted some kibbutzes: Kiryat Anavim and Degania Alef, and the lives of Israeli soldiers, including the Palmach. He also painted copper mines in the Timna Valley. He also painted the Arch of Constantine in Rome, Italy, and a vase of roses.