Firefighters were called to Waitikiri Golf Club on Waitikiri Drive, Burwood at 9.11pm on Tuesday night where they found about 50m of hedge engulfed in flames.
Fire and Emergency New Zealand spokesman Simon Lyford said the fire took more than two hours to extinguish.
Video: Carl Taylor
There was no damage to the golf course or nearby properties, he said.
Nearby resident Carl Taylor said it was "snowing burning flakes" around the houses.
"Flames were certainly higher than the roofs and it's very lucky it never got the houses but I'm sure there [were] some very nervous people."
Mr Lyford said fire crews across the South Island received nine calls related to fireworks on Guy Fawkes night on Tuesday, which was "slightly above average" compared to previous years.
The Mt Wellington blaze was significant, with multiple crews working to extinguish the mammoth 200m by 100m inferno on the north side of the mountain.
Enormous plumes of smoke could be seen across the clear sky late last night and smoke could be smelt across the city before the fire was fully extinguished about 2am.
There was no road access, so firefighters were forced to roll out "hundreds of metres" of hose, while a helicopter could be seen circling above the hill.
Across the country, there were more than 50 fireworks-related blazes throughout the country.
- Matt Slaughter
Additional reporting NZHerald
