Mold in my S/H!!

[ehuber]

Hi all,

I continue to fight the battle against a super dry cold winter in Michigan; the first try with S/H did not go so well since I put sad plants in there. So I am trying again with a healthy Oncidium Ornithorhynchum and a Paph. Raisin Pie "Hsinying" x Sib.

So far they are doing alright, with one little issue: the Prime Agra regularly grows a little dusting of mold on the top after I water. So far the plants do not seem to be suffering from it (the Oncidium has even sent up a new growth shoot!) but I am a little concerned as I killed another orchid by not paying attention to the mold.

The two plants are about a foot away from a semi-shaded south facing window, and the plastic pots rest on a humidity tray. I haven't yet had my min/max thermometer in here, but I suspect it gets to somewhere around 55-60 at night, and around 70 during the day (there's a heating vent about two feet under the humidity tray).

Is a little mold a big problem? Is there something else I can do to try to prevent the mold? One idea I have is to bring in an oscillating fan and try to get more air circulation in here. Would this help out?

I would really appreciate any advice you guys have.

Emily