Black tips could be insufficient humidity. But considering your proximity to
the water I'd doubt it was ambient humidity. It might be drying out too fast
in the large bark you have it in. Try putting a thin layer of fine bark
over the large bark you have it potted in. This will keep more moisture
inside the pot. Or if its in a clay pot slip that pot into a plastic pot and
see if that keeps more moisture at the roots. (Not sopping wet, but more
evenly moist.

Leaf tips also turn black frrom fertilizing a dry pot. The concentration on
salts transport to the leaf tips and result in them dieing back. So water
before you fertilize (like the day before). This'll also keep your bark in
better shape, it won't get crusty white salt deposits on it as fast.

Also, Sharry Baby tends to have small black spots on the leaves anyway,
depending on the light, so if you see those develop, don't freak.

Have you gotten any new growths?

I'm in the Concord area. We get hotter and are drier than most of the rest
of the Bay Area.

K Barrett


"TB" wrote in message
.com...
It's in the window but generally behind a sheer drapery during the day.
The
ends of the leaves were getting a few dark brown spots and the edges also
turn yellow to brown. I though it might be from direct sunlight
occasionally but perhaps it's insufficient humidity? I can try a pebble
tray.

You grew them outdoors without a greenhouse?

I'm in the East Bay not more than a couple of miles from the water so temp
variation is not extreme.

Thank you,
TB


"K Barrett" wrote in message
news:Vokgb.510960$cF.181712@rwcrnsc53...
Can you increase the subdued light? Move it closer to the window? Low
light
levels is the usual reason why orchids don't rebloom. I wouldn't worry
about
the temps, I used to grow this outside here in the SF Bay Area.

K Barrett