Phal Violacea and Bellini

[RosieC]

Along the lines of what people have said above I would ask the question of 'how are you growing it'?

I have found that warm growing Phals don't like S/H in the winter if your conditions are cool. Here in the UK I don't ever let the house go cold but it does get cooler in the winter and my Phals just didn't like S/H in the winter (they loved it in the summer) and I lost a couple that way before I realised the problem (I saved others using a heat mat below them), I now don't use S/H on Phals.

I think the problem is that the clay pellets for S/H cool through evaporation which just drops the temps around the roots a couple of degrees. For warm loving plants in the winter that can be just a bit too much.