Thanks for that, that’s a much better resource than what I managed to find.

So it seems that there are is guidance aimed at keeping it out of composts and manures that people might use on their garden. It does sound like there’s still some risk that a supplier might cut corners or a farmer might lie in order to get a better price for contaminated feed/manures but having it in place does at least reduce the overall risk a fair bit.

Yes, exactly those. It sounds like there are others (chrolopyralids, picloram and others), but aminopyralids are the longest lived in the soil, so the biggest concern.

A lot of the resources on it are discussing the issue from a US or UK perspective, and while a lot of the issues are similar it doesn’t help me assess how much of a risk a bag of manure from the local Bunnings or garden centre might really represent to my vege garden.

It’d also be worth hearing if there’s been any regulatory responses to this issue locally

Thanks for your response - it’s fairly new (planted about a year and a half ago years ago as a 1m high tree from the nursery) and has really taken off over the last Summer. It’s quite a tangle at the moment and needs some neatening up.

It sounds like I’m over thinking things a bit - I know that different plants respond differently to pruning but it sounds like trees are broadly similar even if they do have some variations.

From your response, it sounds like I should probably wait a little until I’m confident that there won’t be any more strings of 30°+ days to avoid stressing it out - it should recover better once conditions are a bit more mild.