Quote Originally Posted by Rashbold View Post
Ah, many thanks. Also, on the potting medium: it looks to be entirely bark, or something like it. Should I mix it up with something else, or use a similar sort of medium? Further, I've read that I should keep a deal of air movement around the roots; now this pot only has holes at the very bottom. Will that impede airflow to the extent that it's problematic, or should I not worry too much about it?
Air movement is important. As for potting medium - use what your watering regime allows. If you water often - avoid sphagnum as it will stay too wet and rot your orchids roots. Here is a video I did on repotting a phal. I also link to a page here on the site that lists the materials used in the video.

How to Repot a Phalaenopsis Orchid



Cheers,
BD