The 2.01m centre dominated the exchanges on the inside and top-scored for the Saints with 24 points.
It was an impressive performance from the 19-year-old, particularly in the first half when he was able to push his way into the paint and get to the hoop largely unchecked.
The win came as a welcome relief for the Nuggets forward. The Nuggets found their comeback season in the National Basketball League tough going, losing all 18 games.
Saturday's win had helped put a smile back on the face.
The defending champion Magic had asserted all the early pressure with forward Tom Allan opening the scoring with two points after he battled his way to the basket.
Lively guard Jordan Small was quick to find his range, drilling two three-pointers and using his pace to lift the tempo of the game.
The Magic led 11-3 but struggled to close down Rowe, who gradually imposed his presence on the game.
Midway through the opening quarter he scored back-to-back lay-ups and also grabbed a three-pointer.
Trailing 21-19 at the first break, the Saints seized control of the match, outscoring the Magic 21-8 in a devastating 10-minute period.
Veteran Saints forward Matt Gillan missed seven three-pointers before he landed one. But once he found his range he quickly advanced his tally with a flurry of scoring in a 13 point haul. He also grabbed nine rebounds. Brother Tim finished the match with 14 points.
Small posted 17 points for the Magic and also led the rebounding with eight boards. Andrew Wheeler and Allan were the next best with 12 points apiece.
In the women's final, Ajax beat Ajax Black 57-53 in an evenly contested game. Janet Main top-scored led Ajax with 13 points, six rebounds, six assists and five steals.
The St Kilda Bullets completed the double for the South Dunedin club, winning the men's B grade final 75-68 against the Varsity Comets. The Andy Bay Falcons beat Otago Boys' High School 70-60 in the men's C grade final, and Coasters beat Andy Bay Falcons 77-55 in the women's B grade final.
