john_ny

I don't pretend to be an expert but, over the years, I have had several thousand orchids. From the picture I cannot determine the species. (maybe someone else can)
Orchid seeds are sown on an agar type medium, similar to that used in TC. From what I can see, this could be either a seedling, or a tissue culture plant. You have to look at the roots and, when it looks like they are developed enough, you can transplant. I would use a mixture of peat moss, perlite, some coir chips (if available) and long fibred sphagnum. Of course, the acclimatization must be done gradually, because the humidity is much higher in the vial.
A couple of years ago, at a trade show in Florida, there was a grower from Hawaii and Taiwan, who had some plants, and a few flasks of seedlings, that he didn't want to have to carry back with him, after the show closing. When I spoke to him, he said that most of the plants were sold, but he wished that someone would buy the flasks. He said there were at least 50 plantlets in each of the 4 flasks. ( they were lalea-catleyas) I got them for $10.00 each and, when I transplanted, I got a total of 470 plants!

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John