Just checked and was editing the size:-) those are in a five inch square pot thats five inch deep, I took this pic last year when I repotted , it was growing in a length of gutter down pipe , long roots
I grew mine in the house either under lights or on a windowsill during winter as I feared death from freezing, but looks like they need cold temps to flower, when grown under lights I adjusted photoperiod to 10 hours. What was the minimum temperature? and would you say they actively grew as they're supposed to be winter growers.
These are from root cuttings taken in 2015 when I repotted the larger plants shown in this thread, the larger plants look a bit scruffy now and I might behead them next year so they can regrow from the roots they don't grow in sphagnum , pot just placed on a sphagnum tray for the pic