good post ES, it really depends on the nursery. In my experience all of them try to give you the bare minimum when it comes to media.
The one I can highly praise here in the UK is orchid alchemy.
Top notch seedlings and substrate even if I did just manage to kill one of them.
Wasn't an important one. Not like a schilleriana coerulea. Now losing that would be a disaster (not that I have one yet, still on the list)
I heard the schilleriana takes 10 years to mature from seed.
EDIT: thefish, I found an interesting article on some coerulea forms:
Fundamentals in Breeding Blue Cattleya and Laelia Hybrids
I found it interesting to discover a new hybrid I hadn't noticed before:
https://www.orchids.org/grexes/laeli...a-schilleriana
Not to be confused with
https://www.orchids.org/grexes/cattl...illeriana-1857