Ivy from a Polish castle was transported in a less than regal manner after biosecurity dogs sniffed out the plants allegedly hidden in a Polish gardener's underpants.
Ministry for Primary Industries staff found plant cuttings, a bulb, a tuber and seeds after the man arrived on a flight at Auckland Airport on Saturday, the ministry's northern border clearance manager Craig Hughes said.
MPI strip-searched the passenger after a biosecurity detector dog sniffed out the plants near the man's groin.
A Customs drug dog had also indicated the man was carrying something in his pants.
The man, a New Zealand resident, was wearing two pairs of underpants and the itchy concealment included ivy from a castle in Poland, Mr Hughes said.