I just posted some photos on someone elses question so if you go there you will see them. It is the question of a bog for a large pond. If you call mine a bog, which I am not sure it is, then I can tell you it is the most successful area of my pond and you and I live in the same climate zone. Hope this helps.

Here is a link that might be useful: My pond.

Insecto,

I'm also in zone 9. I'm able to grow pretty much any bog plant that I choose despite the summer heat. Pitcher Plants, Venus Fly Traps, Spiranthes orchids, Cranberries and many other bog plants from temperate zones. I'm sure that everyone has their own "secrets". Mine was to use a non-perforated pond liner filled with the most acidic soil I could find, (1:1 ratio of Azalea/Camellia mix w/peat moss). I keep the water level just below the surface of the soil and besides a bit of weeding, I just let the bog take care of itself...

Mike

Most places in the U.S. can grow all the standard bog plants (those recommended for peat bogs.) There are a few species here and there that won't be appropriate too far south or north. For example, crowberry might not work so well in the south, but cranberry can be grown just about everywhere from the panhandle of florida to the edge of the arctic circle. Flytraps have been grown successfully from Florida to New York (and could possibly be grown further).

Some plants like Cobra Lily are exceptions and can't tolerate the extremes of hot and cold in the east, so can probably only be grown in the North West, but I that's unusual. Butterworts are also an exception. They are a bit more picky about zones.