In addition to the two Kärra teams, 57 other teams from 9 different countries played in Girls 12. They were divided into 9 different groups, whereof Kärra HF 2 could be found in Group 4 together with OV Helsingborg 1, Rødekro-Aabenraa Håndbold, Fjellhammer IL 2, Hammarby IF and HK Aranäs 3. Kärra HF 2 continued to A-Play-off after reaching 3:rd place in Group 4. In the playoff they made it to 1/16 Final, but lost it against Vorup FB with 11-12. In the Final, Rødekro-Aabenraa Håndbold won over Skanderborg HB 1 and became the winner of A-Play-off in Girls 12. Kärra HF also participated in Girls 11 during Partille Cup 2018. They reached the 1/4 Final in G11 A-Play-off, but lost it against Skuru IK 1 with 8-20.