"Steve Wolstenholme" wrote in message
...

They are about five years old. I use a standard indoor plant feed
about once a month. They have been repotted twice into a loose mix of
garden soil, bark chips and parcel packing polystyrene pieces. Nothing
special at all.

Thanks for the info. I'm using a medium bark orchid mix from Lowe's. So far
so good. I just picked one up by Micacle-Gro and it seems to be finer than
I have ever seen an orchid mix to be.