The Tasmanian Government is considering opening up reserved forests to logging earlier than planned.

After it was elected in 2014, the State Government repealed the Tasmanian Forest Agreement and at that time 400,000 hectares of forests were set aside from harvesting for six years.

The moratorium on logging was designed to appease environmentalists.

Forestry Minister Guy Barnett told Parliament he had advice from Forestry Tasmania suggesting the resource might be needed earlier to meet contractual obligations.

That would mean legislating to lift the six-year moratorium earlier than promised.

"I will be considering whether or not the currently legislated date for access ... April 2020 is appropriate, or whether it might be brought forward," he said.

Return to forest wars: environmentalists

The Wilderness Society said the Government had reignited a conflict around forestry in Tasmania.

Spokesman Vica Bayley said even a six-year moratorium was not enough.

"This is iconic forest areas like the Tarkine, like Wielangta, Blue Tier and the north-east highlands," he said.

"These are places that people have campaigned to protect for years."

The move, he said, was also a signal the bid for Forest Stewardship Council (FSC) had been abandoned.

"Forestry Tasmania has failed to get FSC certification in the forests it's managing at the moment, let alone accessing forests that are earmarked for reserves," he said.

But Mr Barnett disputed the claim.

"This option would not impede Forestry Tasmania in terms of its application going forward for forest stewardship certification," he said.

'Liberals want to take us back to the dark ages': Greens

Greens leader Cassy O'Connor said the move was declaring war on Tasmania's "globally-significant, carbon-rich forests".

Ms O'Connor said the forests in question were in places such as Bruny Island, Wielangta, the Blue Tier and the Tarkine.

"The Liberals want to take us back to the dark ages and revive an unsustainable native forest industry in Tasmania and take this state backwards," she said.

"We will fight this every step of the way."

Mr Barnett said Forestry Tasmania had advised that "while there is theoretically sufficient resource available ... to maintain legislated wood supply, there is an entirely separate question about what can be delivered commercially".

"For this Government, it is a given that we will meet our contractual wood supply obligations," he said.

The Tasmanian Forest Agreement had protected half a million hectares of forest from logging in return for millions of dollars in assistance to the struggling timber industry.

Logging move 'political diversion'

Labor MP Michelle O'Byrne bas brushed aside the move, describing it as a political distraction from bullying allegations made against Government Minister, Rene Hidding.

"It is clearly just a diversion," she said.

"They have got significant problems at the moment with a Premier who is not dealing with the actions of a Minister of the Crown, a member of Cabinet and they are looking for anything to detract attention.

"The Minister announced nothing today and I'm not speculating on nothing."