Thank you Cambria! Your new Bulbi is so, so nice!
Mine likes a lot of water! I use MSU weakly to keep it that way and once a week let him sit in a tray of water for a few days. He seems to really like that.
The spikes arrived right after I increased the light to Catt levels. (apparently he liked that too!)
Once or twice a month I give it Kelp....and I also squeeze in some Magnesium here and there, with plain water.
I think increasing the light levels initiated the spikes.
Good luck with yours! It's beautiful. I just love this bulbophyllum!