In message , Larry Stoter
writes

The best thing with a shredder is the reduction in volume - large
cardboard boxes, heaps of prunings, etc disappear into a small heap when
shredded!

That is the basic ingredient of my compost.
It's time-consuming though, and I'm afraid I mostly put prunings into my
brown bin and let the council do the composting. They sell it to
recoup the cost of collection.
--
Gordon H