Purple leaves: Cold damage, Insect stress, too much light, magnesium or phosphorous

[isurus79]

Originally Posted by Shadeflower

I just realized I never showed the vanda at it's worst to properly compare it.

You might argue "These plants are grown in very high light and are imported directly from Brazil, hence the red leaves. That's how they look naturally."

but I prefer the leaves looking more green how they are now, including on my laelia pumila which has improved nicely too. It was only on Rainmix this started happening.

I’m not arguing. I’m pointing out how plants grow naturally. You are arguing that their natural pigment is unnatural. Your leaf color preference has no bearing on the plant’s metabolic processes.