About 60 people marked the 10th anniversary of the formation of Friends of A'Deane's Bush by attending a planting day and celebratory lunch within the CHB reserve.
On a "cracking" spring day, the crowd planted another 400 trees inside the 40ha reserve, described as one of nature's treasure troves and containing a 34m-high totara tree, one of the largest in the country, and home to long-tailed bats, flocks of kereru and tui.
John and Jay Benton, who initiated the restoration project in 2007, said they were delighted to celebrate the milestone surrounded by many of the people who had helped form Friends of A'Deane's Bush a decade ago.
"It was a bit lonely 10 years ago, but look at us now!" said John.