Hi guys , I've had 2 or 3 pots of cattleyas/epidendrums which just seem to have the problem of the peudobulbs going brown from the bottom up. It continues even after I have cut off the brown ones to stop the chain of events to spread to the other peudoblubs on the same plant. This means the "eyes" do not have a chance to grow. Any idea on what may have caused this? I've been thinking about re-fertilizing my home garden for ahwile now but certainly dont want to go through all that effort if it's something else.

Cheers
Sean