Authorities investigating an accidental shooting Tuesday night that left a 25-year-old man with a self-inflicted leg wound also discovered a large, elaborate marijuana growing operation off Calistoga and Gates roads outside Santa Rosa.

Hundreds of plants were being grown inside and outside the Gates Road property, where the man was wounded while cleaning or fumbling with a pistol, sheriff's Sgt. Carlos Basurto said.

The man, Micah David Bigelow, has been staying in a trailer on the property. He shot himself in the thigh around 10:30 p.m., Basurto said.

The bullet entered his lower leg, causing significant injury, though it did not appear to be life-threatening, Basurto said.

A man who witnessed the incident at the trailer went to the main residence to call 911, then drove Bigelow to Highway 12 and Calistoga Road to meet an ambulance and law enforcement, Basurto said.

Bigelow was not cooperative, but his companion told authorities what had happened, Basurto said.

Detectives who went to investigate found several greenhouses and the marijuana gardens, launching a separate investigation by the sheriff's narcotics team, Basurto said.

Investigators discovered 994 marijuana plants, 250 pounds of processed pot and two greenhouses each about 2,500 square feet, Sgt. Mike Raasch said.

Detectives cited four people for suspected marijuana cultivation. Their names were not available late Wednesday.

"They claimed they were growing for a collective," Raasch said. "But they didn't have documentation to prove the medical marijuana."

Bigelow was taken to Santa Rosa Memorial Hospital, where he was listed in fair condition Wednesday.

Staff Writer Julie Johnson contributed to this report.