Garrison, who won the title in Wairarapa last year, registered one defeat to another player from the capital city, Michael Wright, who pipped him 26-24 in games that could last about two hours.
Intermittent rain didn't bother players but the wind yesterday did a little.
Garrison started playing the game when he was 14 after his mother Sally met his stepfather, Kevin Fellows, who was croquet savvy.
"Kevin's the best coach in the world and he's a really good player in his own right," Garrison said of the 65-year-old, who was also among the competitors here at the weekend.
Does it bother the coach that his protege is stealing the limelight?
Garrison laughed before replying: "Kevin still takes great pleasure in beating but I'm sure he enjoys watching me win, too."
The 2002 World Championship runner-up in Wellington, Garrison said age wasn't a disadvantage unless players were "quite elderly".