Need Cymbidium potting advice

[mjf45322]

I was able to get a few cymbidium species plants.
Tracyanum, bicolor, aloforium, lowianum.
I grow in a greenhouse for the winter and house outside in a shade house in the summer.
I live in Ohio so its kind of cold here during the winter months.
I keep the greenhouse in the winter at night at 55.
How much water do these plants like and what kind of potting medium should I make up?. Straight bark, bark/perilite/characoal/sphag.

Can anyone reccomend a good cymbidium book to buy that would cover species as well the hybirds.
Thanks,
Mike
mjf45322@aol.com