I agree with Ray. Went through a period of time growing them similar to that, but in a clay pot with drainage tipped sideways and leca to stabilize part of the roots. They grew very well. Glad to run across this to refresh my memory... I have one that isn't thriving mounted. No idea why. Might have to pull out a clay pot and put it in recoup mode.
__________________ Caveat: Everything suggested is based on my environment and culture. Please adjust accordingly.