The culture varies on different species but most like it warm and humid. cornu-cervi I have in a pot but most of the roots are across the surface of the medium. It, as stated above, can take fairly bright light.My lobbii is just starting to spike now..very cool species!! It has an articulated labellum like many of the Bulbos. Again I have it in a pot but most of the roots are on the surface so I suspect it would prefer to be mounted as well. Many people make the mistake of keeping Phals at too low lighting. An eastern exposure with some morning sun and bright light the rest of the day is good for most of the species. They like heavy feeding while in growth but it is important to make sure the fertilizer salts are rinsed out of the pots on a regular basis, at least once a month. If not they tend to root burn. Most like to be moist on a constant basis but mounts can dry if the humidity is high enough.
A trick I do with Phals is, at the end of the growth season in early fall, I give them three feedings of magnesium by mixing Epson Salts (1 tbl per gallon) I do these feedings a week apart. I then allow the temps to fall for a few weeks to about 60 degrees at night. This works for the late winter and spring bloomers to help them to develope spikes. The summer bloomers seem to be stimulated by increased temps and light levels as.
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