Ludisia to repot, need help

[Helen]

Hi everyone,
It is now time to repot my Ludisia. I've had it for 14 months, and it's in sphagnum in a small 2" pot...it is growing very tall and has no shoots coming off the base of it, probably due to the fact that it's got no where to go.

Should I be placing it in a wider shallower pot? or just go up a size? I heard that they will sprout new shoots from the root area, is this true?

Also, what potting medium should I use, as I understand it is considered a terrestrial type.

All help is greatly appreciated!
Helen