The city of Renton will celebrate both Earth Day and Arbor Day Saturday, April 28, at Tiffany Park.

Volunteers at the park will care for existing trees, plant new trees, shrubs and flowers, weed and spread mulch. Registration for the event is full.

For 10 years in a row, the city has been honored by the Tree City USA Arbor Day Foundation.

Since the first celebration in 2005, more than 600 trees and thousands of shrubs have been planted thanks to the help of more than 2,000 volunteers.