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Mold indoors during winter is odd - your profile lists only "USA" (put at least a state down to help the gardening board with questions - if you don't feel comfortable with this, then post it with your question. Geographical location can affect indoor conditions as well as outdoor conditions).

Thanks for replying. I'm in northern Kansas, during the summer it's hot and humid, and the winters are dry.

OK, now stupid question (you will probably say "NO, Duhh!" but I gotta ask: are you certain it isn't calcium/mineral buildup?

Nope, I'm 100% positive it's not build-up. Wish it was something that easy :)

Since you probably said "NO, Duhh!" to the above, then most likely the humidity in your house/around the plants is too high - do you mist, do you have a water-pebble-bed, are you watering too much? (if the last, then watch out for root-rot!).

I have a water-pebble-bed, and I know I water too much, but luckily the roots are still healthy. I also have a humidifier for me, and I run it at night in the bedroom (plants in the living room) so I don't know if that could be a problem. Even though now that I think about it, the mold showed up not long after the bathroom sink overflowed and soaked a big chunk of the carpet (not to meantion the big mess it created). For right now I'll just assume that's the culprit.

Since I admit I'm an overwaterer, does anyone have suggestions on the best method of watering? Right now I take all the plants into the bathtub and water them throughly and let them drain. I do this about once a week. Only one has a pebble bed, the orchid. The rest (spider plants, an ivy, mother's-in-law tongue, Amaryllis, and philedendrons) are pretty much on their own except periodic fertilizers and repotting every two years. Any other suggestions?


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