Yve and Chris Pettersen say they regularly make the trip from Melbourne to visit their five-year-old son Sebastian’s grave at the cemetery and often find items they left the previous time disturbed.

Mrs Pettersen said lights had been pulled out of the ground and other bulky items removed.

“We’ve seen animals, but it’s not animals that are pulling things out and smashing glass lights,” she said.

“The last thing we need is this, you want to be able to say hello to your son and be OK about it.”

Mr Pettersen said it had been an issue ever since they buried their son three years ago.

“When he was first (buried) he had head to toe flowers and they all went in a week,” he said.

“It happens nearly every three months but this time has been the worst.”

Mrs Pettersen said the disturbances were too substantial to be weather related.

"His flowers sometimes move with the wind, we get that, but it wasn't trashed like that when we were here last night," she said.

Mrs Pettersen said she'd also witnessed people walking their dogs in the cemetery with some even allowing their pets to walk over and urinate on graves.

Remembrance Parks Central Victoria CEO Graham Fountain said there had been no reported increase of vandalism of graves in Bendigo, but encouraged residents to make contact with any concerns.

"The fencing is relatively secure but we'd expect people to treat the cemeteries and graves or plaques of other people's loved ones like they'd like theirs to be treated, with respect and dignity," he said.