I actually picked up a 5 inch pot full of these on Saturday. My plan is to grow outdoors year round in the pot, but that probably won't work in your area due to winter temps.
I've always seen them grown on the wet side in cultivation -- outdoor bog gardens, near garden ponds, or close enough to the hose that they can be watered easily and frequently. They do well when grown that way.
To me, it's interesting that I've always seen them grown that way in the garden. Locally, there are at least 2, maybe 3 different species (or perhaps varieties of the same species, I'm not particularly privvy to spiranthes taxonomy) that I've encountered in the wild. I've never seen them in particularly close proximity to bodies of water, and certainly not in areas that are boggy or prone to flooding. They've always been in fairly dry woodlands, sometimes in deep shade or hidden deep down in the grass of open woodland clearings.
