Parramatta has reached a significant tree planting milestone at Rydalmere's Upjohn Park for this year's National Tree Day, planting the 60,000th seedling at the park since 2020.

An extra 10,000 new native seedlings have been added to the park with help from 500 volunteers including families and community groups who joined Council's Bushcare team at Australia's largest tree planting event.

City of Parramatta Lord Mayor Cr Martin Zaiter thanked the residents who continued to volunteer their time to help the local environment.

"Our residents are passionate about protecting and improving our local area and the work that has been done at Upjohn Park is extraordinary," Cr Zaiter said.

"The 60,000 seedlings we have planted at Upjohn Park has increased native vegetation cover of the critically endangered Sydney Turpentine Ironbark Forest and provide an essential habitat for native wildlife

"Since 2001, Council has taken part in National Tree Day, planting an incredible more than 143,000 native trees and plants across the area.

"If you visit Ermington's George Kendall Riverside Park or Carlingford's Fred Spurway Park, you will see evidence of past plantings from 2006 and 2010- all helping to achieve a bigger tree canopy creating shade in our green spaces."

Planet Ark's co-CEO Rebecca Gilling congratulated all the volunteers for contributing to the biggest National Tree Day event registered this year.

"It's incredibly heartening to see so many Australians wanting to plant native species, which is a powerful act of hope that not only helps fight climate change but also supports our precious native wildlife," Ms Gilling said.

Council's Bushcare Program relies on a team of dedicated volunteers, who meet once a month at local bushlands to assist with habitat monitoring, weed removal, tree planting and restoration projects.

To volunteer or learn more about the Bushcare program, visit Council's website.