Career
He holds both a Ghanaian passport and a German passport. Lartey began his career with Garather SV, before signing to VfL Leverkusen. In summer 2001, he was scouted from Bayer 04 Leverkusen.
After four years on youth side for Bayer 04, he was promoted to the second team that played in the Regionalliga Nord.
He left after three semi-professional years as reserve of Bayer 04 and signed a contract with Holstein Kiel in summer 2008. The team climbed to the 3.
Liga in the 2008-2009 season. After this successful season, he left Holstein Kiel on 12 June 2009 and signed with Rot Weiss Ahlen.
After one year and the relegation of Rot-Weiss Ahlen, he signed on 10 June 2010 to Football Club Hansa Rostock on a one-year contract.
2009: in Schleswig-Holstein.