In July, Connor Eckhardt, 19, from Roseville, California, inhaled some dried herbs that had been sprayed with chemicals.
His brain swelled and he slipped into a coma. A few days later, he died.
They've now set up a Facebook page with pictures of their son as a warning.
Prior to his death, Eckhardt had decided to become an organ donor.
Connor Eckhardt died after taking ONE HIT of synthetic marijuana (SPICE, K2, POTpourri). This dangerous substance is legal. Help us save lives by sharing.