In response to Roth, so it is not always genetics of the varieties of plants. (rather that of the sellers)
Glad to hear that some are vigorous.
I like both the album and the regular on henryanum.
JC
Actually yes, when doing flasks, everyone knows that there is a percentage of very fast growers, a percentage of good growers, and a percentage of very bad growers. For Maudiae type crosses, there are very bad good growers. For many species, and some Complex paphs crosses, there can be a very large percentage of runts. I would say that, if the lab is good at germination, the runt percentage is never less than 20%. So it is discarded if it is a Pinnochio cross from your Auntie, but for albinos, or FCC parents, the sellers will ask the lab for every single seedlings, including runts. In my experience too, the fastest will bloom in 1-3 years, the slowest over a decade.
There is another misconception too that selfings are less vigorous. It could be the case, if you try to grow the runts. But the good growers from a selfings are growing quite well. Some Siblings are more vigorous, because they involve two different colonies/populations, with different ancestry. As a result, those species seedlings are quite close technically to an F1 hybrid. That's why some roth crosses are very vigorous, some are much less to be honest.
Remember rothschildianum Charles E. x Borneo. The first ones to bloom, the Fccs Ams and AQ were the most vigorous. Jack and Val Tonkin sold Charles E x Borneo for over two decades, including smaller plants of 20-30 cm. Even others traders offered those plants in the 90's 2000's... They were seedlings from the original seed capsule that gave the AQ... Whilst the AQ plants had bloomed at least a dozen times, some plants from the same capsule were still 20cm leafspan.
Henryanum album, I have seen those in Germany, the first batch, and they were fast growers, about 8-10cm leafspan a few months out of flask... That was maybe 6-8 years ago.