epidendrum radicans -- Qs re care

[pdxmaven]

I have three of these. They have grown quite tall and floppy. My reading from other posts suggests I just chop off the long floppy stems, right?

I assume I can I root these stems? How best to do that?

Also, do they like to be crowded in the pot or they don't care?

I have some space in a friend's greenhouse. I keep my cool orchids there, as it gets down to 45 degrees sometimes. Would these be OK there over the winter, or should I keep them in the house?

On of the three (must be a different species) has lots of above ground roots. Just ignore, or replant it deeper?

thanks in advance for your help!