The Survivor Tree blossoms, Tuesday, March 20, 2012 at the World Trade Center. One World Trade Center, left, now up to the 93rd floor, is scheduled for completion in 2013. The callery pear, salvaged from the rubble following the attacks of September 11, 2001, was nursed back to health and replanted at the National September 11 Memorial.
A pear tree that miraculously survived the Sept. 11 terror attack blossomed at ground zero on the first day of spring.
The "Survivor Tree" — as it's been dubbed — was discovered amid the smoldering rubble, limbs lifeless, roots snapped, trunk blackened.
Workers freed it and it was nursed back to health in a Bronx park.
Now topping 30 feet — four times its size in 2001 — it towers above newly planted trees in Memorial Plaza at the World Trade Center.
On Tuesday, the survivor sprouted white blossoms, seen for the first time by visitors to the 9/11 memorial that opened last September.
Mayor Michael Bloomberg has called the tree a testament to New York's "ability to endure and a symbol of our unshakeable belief in a brighter future."