Vanda Royal Blue?

[Dorra]

Paphlurv:
This is the 3rd time it blooms since I bought it... both precursors were flowers blue. And no ... they was'nt dye. I am sure of that.

Roberta:
I have the same growing condition. Outside in the shadow house in the summer and now on windowchill under the artificial light. Temperature are more or less the same. I use R/O water and RainMix. This spring, however, I fertilized with Iguana Blom.

[Roberta]

Originally Posted by Dorra

Roberta:
I have the same growing condition. Outside in the shadow house in the summer and now on windowchill under the artificial light. Temperature are more or less the same. I use R/O water and RainMix. This spring, however, I fertilized with Iguana Blom.

Ah ha! If the fertilizer was on the acidic side (the "bloom blooster" fertilizers tend to be), and you had been using a balance fertilizer before, that could do it! When you are using RO water, it doesn't take much fertilizer to shift the pH. I think RainMix is designed for pure water and gets it right. Go back to the fertilizer you were using before, and it's very likely that your flowers will go back to blue.