G'day Tony,

So we're talking some big tough hard lumps of bark by the sounds of it! I suppose the other question is how much you intend to mulch and how big the bark sheets are?

I'm also wondering about allelopathic effects. I don't know a huge amount about it but I did once put a truckload of chip mulch on the gardens which was mainly from small eucalypts and acacias and it took years before anything was very successful in those gardens. I blamed the mulch for robbing the nitrogen and natural growth suppressing effects from the Australian timbers in the mulch.

Cheers,