Suggestions

I personally don't believe there is such a thing as "prose poetry".  Some people use the term for freeverse that utilises a lot of sentence-like lines -- I actually think it's a bit of an insult to call anyone's poetry prose.  You can write "poetic prose" though -- using poetic devices like metaphor and alliteration in your regular sentence/paragraph kind of writing. 

The other reason people call things prose poetry is because of a lack of poetic device -- straight out statements that are just broken up into a poem-like format.   This can be effective but honestly, it rarely is.