It's come a long way since I got the original division from Dennis. I'll be dividing this clone in Feb/Mar of 2022. You can PM me if anyone's interested in a piece. Not sure of the price yet -depends upon how it divides.
my Qf Maria,being a really close relative,is growing like a weed,in a slightly modified tray( a pot in a tray) I fill water in the pot at the base of the plant,until it fills 1 inch of water in the tray(which is only 1 inch bigger). When the water in the tray is only 1/4 inch deep,I refill.The funny thing is,in the south facing window,my Cattleyas and Laelias,in normal bark ,in the same window,love that watering timing.Right now,they are all in growth phase.
I think it prefers warmer temperatures than P. besseae, and it's location in our greenhouse is not as close to the cooler discharge as P.besseae. That location runs about 5 *F warmer during the summer months. If memory serves, Ecuagenera was also growing this species in a warmer location than their P. besseae's, but it's been several years since I visited their greenhouses in Ecuador.