ABC gardening personality Peter Cundall has been found guilty of disobeying the direction of a police officer during a rally at Parliament House in Hobart.

Cundall, 83, and 56 other protesters were arrested after refusing to move from the Parliament's steps during an anti-pulp mill protest in November 2009.

He and fellow protester, wheelchair-bound nurse Molly Taylor were today found guilty without conviction and were ordered to pay about $47 in court costs.

Cundall says it is disappointing.

"We've been found guilty of standing up for the truth and standing up for justice. It's as simple as that," he said.

But he says he will continue to peacefully protest against Gunns' proposed Tasmanian pulp mill.

"The protest and the battle against the pulp mill will never stop and we'll never give in," he said.

"As far as I and the others are concerned, we'll do everything we can, as we've always done, not to break the law."