Brisbane lord mayor Adrian Schrinner has suggested more "cynical" minds than he could see a conspiracy concocted between the Labor state government and Labor's council election campaign to stop mowing grass along roads in a bid to damage his campaign.

Cr Schrinner on Wednesday claimed the state government was not cutting the grass along main roads around Brisbane fast enough, after a recent explosion in grass growth because of heavy rain.

Grass-cutting has become an unexpected Brisbane City Council election battleground. Credit:File

The lord mayor said the long grass was an "eyesore" and that council mowed grass 15 to 18 times a year, while he believed the state managed about seven to nine times a year.

"We see [Main Roads Minister Mark] Bailey, in charge of this area ... and it is really concerning that he stopped cutting the grass in the lead-up to a council election," Cr Schrinner said.