Old cattleya collection haven't bloomed for over 40 years

[estación seca]

Healthy Catts regularly make more than one new growth per pseudobulb. In the tropics I would regard one pseudobulb per growth per year as poor growth.

I would try would be even more light, more fertilizer and more watering.

What fertilizer do you use? How do you mix it? How often do you fertilize?

Try to give enough light that the leaves are closer to yellow than green.