It's been less than a week since I posted, and amazingly I'm already seeing results! I'm keeping the sphag pretty wet now, and there's already two 1/2 inch roots growing down into it (usually they hardly get past the nubbin stage). Thanks you guys, can't believe it was such a simple fix! Fingers crossed that they keep growing.
__________________ Camille
Completely orchid obsessed and loving every minute of it....