Question: will the green giants grow in se michigan
Answer: I assume you mean Thuja 'Green Giant' which is an arborvitae tree. It is cold hardy to USDA zone 4 (minus 30 to minus 20 below), so if your winter temperatures don't drop below that, it should be fine.
Q&A Library Searching Tips
When singular and plural spellings differ, as in peony and peonies, try both.