In addition to (or because of) being very cool, they're also expensive. I can't justify the price. I suspect it's OK with the company if I show their product (note - no connection between me and the company. I haven't even bought their product - yet) -
White Flower Farm orchids
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evenly moist, humus-rich soil with a slightly acid to neutral pH and dappled shade."
Then there are Bletilla, which are East Asian ground orchids but not lady slippers.
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They also carry a burgundy Paphiopedilium hybrid. However, I already have one. The instructions note "Lady's Slipper Orchids thrive in bright but indirect light. An east-facing window is ideal, but plants can also grow well in a south- or west-facing window if shaded somewhat by neighboring plants or a sheer curtain. If the leaves begin to bleach to a pale green or yellow green color, then your plant is receiving too much light. Lady's Slippers need warm temperatures (70-80°F) during the day and cool temperatures (60-65°F) at night to set their flower buds. They also prefer a high relative humidity -- upwards of 50%." Since my little plant has pale leaves, it may have had too much light, but now it's in a shaded W. window, and during the winter in Pacific NW I don't think that excessive light is an issue.
The Cypripedium really is out of my range. Maybe if I won the lotto. I keep thinking about the lower priced Bletilla.... It's the only way I'll ever see one in person. I'll think about it for a while. There is one spot that might work, with shade from large old Cherry tree, privacy fence on west, and chicken house on south. Exposure is East, and this is the spot were I moved most of the hostas. If it is kept from drying out too much in the midsummer, it might work.
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Here's another site I ran across. The prices are getting more tempting. I can't vouch for the source.