I'm finding ta lot of different things on the internet rabbit-hole about irises in the bog. Planning out a new bog filter for my recently completed pond and I'd like to have a variety of irises in the gravel. Looking for types or iris that will grow in the bog and survive winter in Michigan. I've seen some info that Louisiana and Siberian irises are suitable for the bog but then some that says only 'true' water irises are. Would appreciate any clarity/suggestions on appropriate plants. Thank you