50% shade is too much.
Up the light and you will see flowers in no time.
Good Luck!
I sure do agree with the above! I took off my 40% shade cloth because my orchids were not getting enough light to set blooms. I now have spikes on two plants... ( Emerald Isle )Three on one & one on another. They are both getting blossom booster until I can see the spikes inside of the sheaths. Hope yours gets some flowers soon...BettyE.