Two things .....

[james mickelso]

It's just a sometime thing. The redness of these leaves is just this type orchid. Or I should say this plant. Not sunlight levels or anything like that. I use CalMg from Ray when I get fertilizer. I switch to other ferts too. Just a habit. He just sent me a years supply though. I have taken plants out of the pot before to see if there is anything wrong at the root level. Nada. Zilch. Nothing. It turns black down to the rizome and then stops. The rizome then puts out a new bud or two which then grow healthily. Puzzled. Thanks for the info.