The shipping container was filled mostly with rice, but drug-sniffing dogs found 252 marijuana bricks tucked underneath, weighing in at approximately 614 pounds.
Agents from Homeland Security and U.S. Customs and Border Protection seized the weed at a Philadelphia port on March 7, which was destined for an address in North Jersey.
Now all the leaves, with a street value of $2.5 million, will be destroyed.
CBP officials say it's one of the biggest marijuana busts they have had.