33.333333%

Not, exactly what you'd call a "Pass-rate".

Not so long ago I took a fancy for some
Cyprideium reginae

Two, different, suppliers said things like...
Hardy Perennial
Hardy and easy to grow, this Lady's Slipper Orchid will soon create an impressive focal point in your garden. Lush clumps will form in borders and more than 50 truly stunning orchid blooms will be produced over the season.
and
Hardy Slipper Orchids - The Cypripedium family are undoubtedly the most sumptuous of all the orchids that will thrive in our British climate.

Can't remember whence they came, but the two suppliers above are now selling them potted for Sep-Oct dispatch.

My 3 came bare rooted with instructions that, if they weren't to be planted immediately, keep @ 5C until planting.

So I did, for all of 24hrs.

What have I got to show for it?

33.333333333333333333% success.
:¬((

Yet another "Watch this space".