Orange spots on Brassada Orange Delight 'Hilo Sunrise'

[OrcishOrchids]

Hi guys, I need some help with this little seedling. I've had it since February 2021, and very slowly it developed this odd patterning only on the underside of it's leaves. otherwise it's growing fine, I'm just a bit concerned. Is this just pigmentation since it's an orange flower? Or should I be worried? Note: tissue was placed over the moss just so I could photograph the spots better)

[estación seca]

Bump

I don't know. I don't grow it. I don't think that's normal.

I looked up its ancestry; it is a mixture of four species growing cool to hot, of which I've grown two. My impression is Brassias get lots of spots when humidity is low, the water has too many dissolved solids or it's too hot for them. Do any of those apply to your growing conditions?

They are susceptible to spider mites, but that damage looks different from this. It is more patchy and the spots would be even smaller.

By the way, most botanists have lumped Ada into Brassia, so this would now be called a Brassia.

[OrcishOrchids]

Originally Posted by estación seca

Bump

I don't know. I don't grow it. I don't think that's normal.

I looked up its ancestry; it is a mixture of four species growing cool to hot, of which I've grown two. My impression is Brassias get lots of spots when humidity is low, the water has too many dissolved solids or it's too hot for them. Do any of those apply to your growing conditions?

They are susceptible to spider mites, but that damage looks different from this. It is more patchy and the spots would be even smaller.

By the way, most botanists have lumped Ada into Brassia, so this would now be called a Brassia.

my humidity averages around 60%, temps go from 72 at night up to 82 during the day. grown under lights near a large window. no other plants have this. I'll try diluting my fertilizer more, just recently moved to using distilled water so it might be residual from when I was using tap.
thanks for updating me on the name, I'll try to remember to re-write the tag next time I repot.

[estación seca]

Temperature and humidity should be fine. My guess would be water, but I'm not sure.

[OrcishOrchids]

my husband was kind enough to break out his big camera so I could try to take a close-up shot of the spots. again these are only on the underside of the leaves.