Masdevallia's leaf problems
 

I've been growing Masdevallia's for several years Masdevallia's.
But now almost all have the same problem the same problem.

It start with the blackening of the leaf tips at the back of the leaf. (picture 1)
Then the leaves turn leathery after that they turn yellow. (Picture 2 and 3)
Some leaves will curl up.
After that te leaves drop and the plant dies. (picture 4 and 5)
The plants keep producing new leaves.
However, these are smaller and fall off before they mature.

I grow them cool in a greenhouse.

I need some help with this before they all die.

1. Pots look too big.

2. List the names of the Masdevallias.

3. Don't grow them too bright.

4. How often do you water?

I find mine do well with quite a bit of air circulation. I have an evaporative humidifier that switches on if humidity drops below 55% - in my conditions its running at least 8 hours a day. I also have them near a slightly open window which helps with circulation.

Here is the list of Masdevallia's that I own:

Masdevallia atahualpa
Masdevallia buccinator
Masdevallia caudata
Masdevallia caudata x veitchiana
Masdevallia chaparensis x Copper Wings
Masdevallia chasei
Masdevallia coccinea
Masdevallia Confetti x triangularis
Masdevallia decumana
Masdevallia don-quijote
Masdevallia floribunda var. galeottiana
Masdevallia Flying Colours
Masdevallia garciae
Masdevallia Huayna Picchu
Masdevallia ignea
Masdevallia ignea x Copper Angel
Masdevallia infracta var. aristata
masdevallia lucernula
Masdevallia macrura
Masdevallia measuresiana
Masdevallia minuta
Masdevallia nidifica
Masdevallia pachyura
Masdevallia paivaeana
Masdevallia rigens
Masdevallia torta
Masdevallia tovarensis
Masdevallia veitchiana
Masdevallia veitchiana x glandulosa
Masdevallia ventricosa

I give them water twice a week.
Indeed it could to bright for them so i moved them.
the humidity is always above 60% and at night even higher.

Hopefully the changing of places helps.
Air circulation is good (fan).

Hi there, I know this is a very old thread. But I’m having literally the exact same problem, and I’m hoping you may have had some luck diagnosing your Masdevallia problem. Please let me know. Thank you!

Bacterial issue
 

I’m thinking that your having a fusarium issue or another type of bacteria.. apparently old post but it’s always good to share food for thought information! I hope you got it all sorted out ;)