Masdevallia on death's door

[King_of_orchid_growing:)]

Here're another few suggestions...

Try a clear or translucent plastic pot. There are now pots that are as small as 2".

Instead of full moss, you could also try using medium grade bark and a moss top dressing.

I think your temperatures should be okay. Especially if the room you're growing in doesn't go above 80 F (26 C) - you gotta make sure though.

Fertilizers should be urea free.

N-P-K is fine.

Concentration of fertilizer is a actually a bit weak, but it's fine. You can go two pinches per L, and it'd be okay.

If the room's humidity is around 60%, I don't think it's a problem.

If you like, here's a suggestion for a more temperature tolerant Masd species to try out. Or perhaps a few hybrids too.

Masd infracta

Masdevallia Dean Haas
Masdevallia Copper Angel
Masdevallia Sunset Jaguar 'Nightbreed'

[Gin]

Adding to Philip's list which I copied is Fractured Angel and infracta 'Flutter bye' I have a big old infracta it is a diffrent color then the flutter bye ..