Posted: 03/11/2015 at 22:01
I borrow an old atco silent shredder which I think has been superseded by Bosch. It works by way of a slow turning cog like cutter which draws in the stems and chops/crushes them into 3/4 inch chunks which make a really good mulch. It will happily eat anything that fits into it up to around 1 1/2 inches.
The cheaper shredders tend to be those that have a fast spinning disc in the base with a pair of blades attached. My limited experience with these is that they can clog up and usually need to be opened up to clear them.
I'd recommend going to a specialist dealer and get a demonstration before parting with any significant sum.