Are Miltassia Charles M. Fitch slow growers?

[Jim S]

Are these slow growers? Mine puts out a new pseudobulb about once a year. It has no bugs, no bacteria/fugus problems -it's just slow. Regular watering with somewhat drying out between, 2500-3000 fc of filtered direct sun for 3-4 hrs, then about 750-1500 fc indirect light. Medium-small bark with coconut husk, charcoal, those fake white rocks, and little bit of sphagnum. Fertilizer is 10-10-10 about every three weeks.