Probably apropos of nothing I came across many of Dr Wang's articles online.
He notes higher nighttime temps than the conventional wisdom would allow.
http://primera.tamu.edu/orchids/orchids.htm

Whether this applies to species phals I have no idea, but its food for
thought.

K Barrett

"Dan Kelley" wrote in message
...
About two years ago I bought an N.B.S. Phal. Leuddemania “Arlington”
from Parkside, it arrived in good shape and has grown well. Last year
it threw a flower stalk which is still there and very much alive but did
not produce any flowers. This year it threw two more flower stalks that
are both doing well. All three stalks show what look like tiny buds but
do nothing more. The plant is growing on a windowsill with natural
light. Five other phals next to it are growing well and flowering in
season. Any ideas on getting it to bloom? Thanks in advance