Mr. Gardening Person answers with compost counseling (see question below):

Many shrubs, particularly the tropical kinds, are resistant to decomposition — they have to be tough enough to withstand the hot sun, bugs, etc.  Even with some of mine, I shred it before putting it into the compost bin.

If you want fast action, put the shrubbery somewhere else — like out into a field.

Tom

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My mom puts a bunch of green shrubbery into the compost barrel where we put our vegetable and fruit scraps, and it doesn’t cook down so fast. In fact, I worry that it’s constipated.

What do you think?

I don’t know how to use those, we just found one in the yard one day. Friends put it there.

The one we have looks just like these:

http://m5.paperblog.com/i/23/233913/the-art-of-the-compost-bin-L-PGpN9V.jpeg