The manager of one farm, Edgar Rodriguez, a U.S. citizen, said he was handcuffed, thrown to the ground and had his arm twisted behind his back after he asked to see a warrant.

Ten of the 14 children found at the marijuana grow sites in California did not have a parent present at the facility, according to DHS.

The annual competition and showcase, called California Cannabis Experience, was sponsored by Embarc, a Sacramento dispensary. The event provides information on the history of cannabis and its usages through educational banners, booths and seminars.

Fox News' Christina Coleman reports the latest on the ICE raid on a California cannabis farm and the reaction to a federal judge issuing a restraining order regarding raids.

ICE agents raided cannabis nurseries in Camarillo, California, and Carpinteria, California, on Thursday. Both cannabis facilities are owned by Glass House Brands Inc., which bills itself as one of the largest cannabis flower brands in the world.

Federal agents conducted immigration enforcement raids on Thursday on state-licensed marijuana nurseries in an agricultural region of coastal Southern California, where they were confronted by throngs of angry protesters.

But the celebration comes amid new financial strain. California’s excise tax on legal cannabis recently increased from 15% to 19%. The excise tax is applied before standard sales taxes. "The 4-percent is huge. I think it affects the consumer, the consumers the most," Chu said.

Patricia Ortiz, directing attorney, at the California Rural Legal Assistance, gives insight on common fears among undocumented farmworkers when working in hostile environments. State officials say a Ventura County cannabis farm raided by immigration agents has open child labor complaint.