Pirates made good use of its wind advantage in the first spell to score two tries when it beat 12-5 Zingari-Richmond in slippery conditions at Hancock Park.
Harbour retained the Scoles Memorial Trophy with a win over Zingari-Richmond at Forsyth Barr Stadium.
Midfield back Kori Rupene sparked Taieri's nine-try scoring spree at Peter Johnstone Park when he broke through the centre and scored the first try midway through the first spell.
Lively hooker Masiu Akavola scored two second-half tries and played a key role in Zingari-Richmond's last-gasp 20-19 win over Alhambra-Union at Montecillo.
The aggressive play of No 8 Mark Atkins helped Dunedin to a convincing seven-try win at Kettle Park.
Southern started slowly but played superb rugby in the remaining 60 minutes to beat Zingari-Richmond in cold conditions at Montecillo.
First five-eighth Matt Te Tana masterminded Kaikorai's win over Zingari-Richmond in the Tom Richmond Memorial match at Bishopscourt.
Green Island blasted to a 17-0 lead in the first five minutes but then took its foot off the accelerator and allowed Zingari-Richmond back into the game at Miller Park.
Pirates proved more committed in the forwards and to the breakdown, when it overcame Zingari-Richmond in the Centennial Trophy match at Montecillo.
Zingari-Richmond players and supporters punched the air in celebration after replacement Shaun Driver kicked a late penalty to clinch a dramatic win over Harbour at Watson Park.
Zingari-Richmond won a few battles but lost the war as Southern held on to a home-ground advantage to clinch a hard-fought 34-27 victory.
Green Island had Zingari-Richmond captain Chris Bell to thank for its victory in a thriller at Miller Park.
First five-eighth Andrew Reid played a dominant role when Taieri scored seven tries to beat Zingari-Richmond at Peter Johnstone Park.
Zingari-Richmond was beaten but not disgraced when it lost to Kaikorai in the Tom Watkins Memorial match at Montecillo.
Harbour retained the Scoles Memorial trophy when it beat Zingari-Richmond in a messy game at Watson Park.
The experienced heads in the Pirates forward pack laid the foundation for a hard-fought 15-3 victory over Zingari-Richmond at Montecillo.
Southern went on the rampage to score 10 tries to beat Zingari-Richmond 64-0 at Bathgate Park.
Peter Breen played a leading role when Alhambra-Union scored seven tries to beat Zingari-Richmond 43-3 at Montecillo.
Dunedin came to life in the second spell to win an error-ridden game 42-12 at Kettle Park.
University A came back to its best form when it scored 11 tries to thump Zingari-Richmond at the University Oval.