Firewood Biosecurity: Why You Can't Just Move Wood Between Areas or States

Short version: untreated firewood is one of the easiest ways to move tree pests and diseases across the country, because bark and unseasoned timber can carry live insects, larvae, fungal spores and pathogens that a visual check will not catch. Several Australian states and territories restrict or require permits for moving certain firewood and timber across biosecurity zone or state lines, and the specific rules genuinely differ by jurisdiction and change over time as new pest incursions are managed. This is not a guide to any one state's current rule text, those change and you should check them directly, it is a guide to why the rules exist and what questions to ask before a load of wood crosses a line on a map.

Why firewood specifically

A live tree has natural defences, and a healthy, standing tree is relatively hard for many pests to establish in unnoticed. Cut, stacked firewood is a different story. Bark left on split logs is an ideal hiding spot for wood-boring beetles, and unseasoned or partially seasoned wood can still be harbouring larvae, eggs or fungal material well after it has been cut and stacked, sometimes for a long time. Because firewood moves by vehicle, in bulk, often over long distances, and often between a rural source and an urban buyer or a totally different region, it is one of the highest-risk pathways for accidentally relocating something that took decades to establish where it was found and would take decades to eradicate somewhere new.

This is not a hypothetical concern. Australia's biosecurity system spends enormous effort tracking and containing tree pest and disease incursions once they arrive, from various beetle and borer species to fungal pathogens that affect specific tree families. More recently, incursions like the Polyphagous Shot-Hole Borer, which affects a very wide range of host tree species, have prompted significant management responses in the areas where it has been detected, including movement controls on host material. The exact detail of any current incursion, which species are affected, which zones are restricted, and what the movement rules actually say, is exactly the kind of thing that changes as the response evolves, so treat anything you read online, including this article, as background rather than as the current rule.

What actually gets restricted

Broadly, and this varies significantly by state, territory and even by local government area depending on what has been detected nearby, biosecurity rules around firewood and timber movement tend to focus on:

• Untreated or unprocessed material with bark still attached, since bark is where a lot of pest life cycles happen.
• Movement out of a declared or quarantine zone around a known pest or disease detection, sometimes a whole state, sometimes a much smaller local area.
• Movement of specific host species for a specific pest, rather than a blanket ban on all firewood.
• Movement between states, where a state that is currently free of a particular pest or disease restricts incoming material from states where it is present, to protect its own status.

Processed, kiln-dried, or otherwise treated timber is often treated differently from raw, bark-on firewood, because processing reduces or removes the biosecurity risk. But whether your load counts as sufficiently treated is a question for the relevant regulator, not a guess.

What to check before a load crosses a zone or state line

If you are buying or selling firewood that will travel any real distance, especially across a state border or into or out of an area with a known pest detection, work through this before the load moves:

1. Check the current rules for both the origin and destination, through the relevant state or territory agriculture or biosecurity department. Rules can apply based on where wood came from, not just where it is going.
2. Ask the seller exactly where the wood was sourced. A seller who cannot tell you which region or property the wood came from cannot tell you whether it is subject to a movement restriction either.
3. Look for current declared zones or areas around known pest or disease detections near the source, these are published and updated by state biosecurity agencies as situations change.
4. Don't assume "it's just firewood for my fireplace" is exempt. Movement restrictions are usually about the material itself, not what you intend to do with it once it arrives.
5. When in doubt, buy and sell locally. The biosecurity risk of moving wood scales with distance and how different the source and destination environments are. A load sourced and burned within the same general region carries far less risk, and far less compliance uncertainty, than one trucked across a state line.

What this means for buyers and sellers on the marketplace

If you are listing firewood for sale, note the general region it was sourced from honestly, buyers increasingly ask, and it is the single most useful piece of information for someone checking whether a purchase is compliant with rules on their end. If you are buying, particularly for a large load being freighted any distance, ask the sourcing question before you commit, not after the wood is already on a truck.

None of this is about avoiding cross-border firewood trade altogether, plenty of it happens legitimately every day. It is about not being the load that carries something nobody wanted moved. Once you know the wood is legitimately sourced and cleared to move, the next question is usually whether what you are being sold is actually what was promised: our guides to how much firewood is really in a load and telling seasoned wood from green cover the two most common ways buyers get short-changed once the biosecurity question is sorted.

Buying or selling within your region, browse local firewood listings or list your wood free, and note the source area in the description so buyers moving it further can make an informed call.