SALEM, Ore. -- A medical marijuana cardholder who deputies said had too many plants was arrested Friday morning.

Detectives with the Marion County Sheriff's Office Street Crimes Unit served a search warrant at the home of Marc Kauffman, 56, just before 10 a.m. and found that he had 35 mature marijuana plants and eight immature marijuana plants in his house, deputies said.

People with a medical marijuana card can only have six mature plants and 18 immature plants, deputies said.

The case stemmed from a charge that Kauffman was involving a minor in a drug offense because he had employed a 15-year-old to help him tend his plants, deputies said.

The boy doesn't live with Kauffman and wasn't taken into protective custody, deputies said.

Kauffman was charged with manufacturing marijuana and involving a minor in a drug offense.