Thanks, I am not sure if it qualifies as cultivated as nothing is being done to it except experimenting on locations. I purchased a group of 4-5 mature sized plants together & planted it into 3 locations in my back yard. This is the only location that it grew & bloomed. This is in the woods, deep shade under pine tree moist soil area.
The other two are not under pine, including a location that I grew the yellow slipper well. I even tried to water with diluted vinegar based on a read, but it's not working. One disappeared, the rest are shrinking in size. But at least I found the location this will grow, hope it'll expand & multiply over time.