Alicia: The most common causes of excessive leaf drop in vandas are (1)
too dry; (2) too cold. You should, however, expect most vandas to drop
1-2 bottom leaves each winter. Some more than others, and as best I can
figure, genetics plays a big role in that.

On the too cold, most really like to be warm. We heat to 55F and still have
more leaf drop than we would like, in winter. But we have to compromise,
since we don't have a whole separate vanda house (although we do have a
separate watering zone for them, that's a must).

Being indoors, you probably have to pot your vandas, which means you can't
do what we do to prevent "too dry" (make it "rain" on them for 12 minutes
every am). But the poster who mentioned getting the roots to turn green
each time you water was right on target. It might also help to feed the
vandas more, compared to your other plants. The more water, the more food,
is a good rule of thumb.

I don't think that low light would cause the leaf drop, although it will
interfere with blooming.

Good growing,

--
Kenni Judd
Juno Beach Orchids


"Alicia Moïse" wrote in message
t...
Live in central OH and keep several vandas in my conservatory on a
humidity
tray. The leaves turn yellow and fall off then it dies. What else do they
need? Dendrobiums, cattelayas, phalenopsis live in the same room and are
thriving. Varigated papheopedolums have healthy foliage but don't bloom.
Any suggestions?