Winter Phrag Care?

[CariC]

Hi everyone,
I'm still pretty new to orchids, only having them for about two years now. I have one phrag, a delassandroi, which I love.

I was told by the grower (and I've read other places) that during the summer months I should keep it in a dish of water to keep it always moist. However, I can't seem to find information on how to care for it in the winter.

Does it still need to be wet constantly? Do I fertilize it at all?

Also, since I bought it in March, it hasn't grown or shown any signs of anything. If anything, it looks like one of the leaves is very slowly turning a little yellow. I use rain water, have good air flow around it, use only organic fertilizers, and make sure it gets plenty of light (but not too much). What am I missing?

Thank you for any information you can give. I appreciate it!