Hi Chris, I can't speak about semi-hydro but your potting mix & culture all
depends where you grow. You want a quick draining mix especially if it rains
in the
winter time.
There is a super web page about potting etc. with pictures but unfortunately
I no
longer have it. Hoping someone will read this & post.
In the mean time try this:-
http://www.cymbidium.org/cymbidium4.html
Keep us posted as to what you decide.
Cheers Wendy
"Chris Ridge" wrote in message
.net...
I just bought my first two cyms. They are standard size, blooming in 1
gal.
nursery pots. I want to divide the one which has completely filled its
pot,
but the other has room to grow for at least another year. The top of the
potting medium is small bark chips mixed with some perlite, but
underneath
it looks like peat moss-based potting soil mixed with small chunks of
bark.
I know that this would be too broken down for most orchids, but from what
I've read, cyms like a semi-terrestrial mix. So what I need to know is,
what kind of mix should I use when repotting? Is the current mix too
small
and broken down? Any thoughts on semi-hydro? I've had great success with
it so far, but I'm not sure about using it for such a big plant.

Thanks,
Chris