St John's Hill School pupils have been mucking in at Gordon Park Scenic Reserve as part of the Department of Conservation's Conservation Week.
About 15 Year 4 pupils from the school joined in a planting session at the reserve on Thursday morning.
Public tours of the park were held from 10am before pupils and volunteers spent time planting ti kouka, cabbage trees.
The plants had been grown by volunteers using seeds taken from the reserve.
St John's Hill School deputy principal Kevin Booth said the school has been working with Friends of Gordon Park on projects to do with the reserve for several years.
"Last year they left gave us plants that they'd recovered from the tracks.
"We grew them on for a year and we came out and planted them."
The school has also been involved in pest control around the boundary and will help with trapping in the future.
The work out at the reserve ties in with classroom work.
"We try to get the whole school involved at some point on an ongoing basis throughout the year."
Wanganui Toyota was also onsite cooking up a post-work sausage sizzle.
"We come out and support them and the school, and cook them some lunch," Wanganui Toyota's Richard Nessling said.