Well, if I had the space I would make the bog 3-4 times larger to include all the plants I have in pots, but that would be in the next house where I imagin to have much more space
Here are a few others that grows well in the bog:
Calla palustris, growing tooo well.
I have 3 species that seems to do well of Dactylorhizas in there. Will sow some seeds and hopefully have more to plant out soon.