The "Survivor Tree" was plucked from the wreckage of the World Trade Center and nursed back to health at the Van Cortlandt Nursery in the Bronx.
Mayor Michael Bloomberg along with other city officials and Sept. 11 survivors replanted the Callery Pear tree Wednesday at the Sept. 11 Memorial Plaza.
The tree was originally planted at the trade center complex in the 1970s. It was discovered in the rubble in October 2001 with snapped roots and a blackened trunk.
It was only 8 feet high in 2001, as most of the tree was crushed when the towers fell.
The tree now stands 35 feet tall.
Bloomberg said the tree symbolizes the city and country's resilience.
It joins hundreds of others being planted at the Memorial Plaza, which is set to open next year.