i dont speak spanish.. but you can see the wood chips its growing on ... and in the second pic.. you can see whatever you dumped there that its growing on ... did you throw saw dust in the garden bed??? ... and now fungi is attacking it as it breaks down... and if you did use bare wood.. it might also be why your plants look lacking in nitrogen ... ignore it ken

I know there's a question hidden in there somewhere .......?

Who told you the plants are the problem? From your description it sounds like either bad construction or material failure, not something that happened over the course of one winter due to indoor plants. I've never had mold issues (even growing indoor plants in extremely humid south Florida), and ~30 plant pots shouldn't be causing your house to basically rot. Does your location usually have really harsh winters with a lot of snow and ice? Are you repairing the windows or did you hire someone?

To add: The drainage had no baring on if it would show up or not. I have some pots that had admittedly horrid draining(because I was growing tomatoes in them and they suck up all the water in less than a day anyway), and a Sarracenia straight up in a constantly sopping wet moss ball of peet, perilite, and sphagnum. The fungus/mold never touches those. Other planters, one of which is made of pallet wood with wide separations between each board, and carbon mesh to hold in the dirt, dries out completely within a couple hours of being watered and I watered it whenever the vining plants in it started to wilt(every 2-3 days) still saw this stuff showing up in the dirt but not on the wood. My various pots are made of wood, terra cota, clay, plastic, carbon mesh, plastic seed starter trays, and green solo cup. I did bleach the pots before I used them, and the ones I emptied and refilled. I did not sterilize the soil, but I used different brands and even got it from different dealers. It didn't seem to matter. The original soil was MiracleGro potting mix and the cactus mix was MiracleGro grow as well. Star-Green perlite. Better Grow Orchid Mix. I think the other potting soil I tried was Jobe's but I don't remember exactly. Also Jiffy Seed Start Mix I store the soil inside my house in a tupper-ware bucket and some of it is even still damp, but nothing inside the bags seems to have this growing on or in it and smells clean. While I can't be entirely sure that it is directly the culprit, because I had frustrating pest problems as well (that I could trace to the environment outside my patio) and my watering regimen being torturous, many of my plants did struggle and die. I eventually wasn't watering until they still were wilted at night. None of my herbs except for a couple of the nearly 2 dozen basil plants I tried to grow would take, even when I wasn't starving them of water. None of the lettuce survived. The tomatoes grew like crazy but the fruit rotted, and many of my flowers either died or constantly had sickly looking leaves. When I'd give up on ones that weren't completely dead I found the stems rotting or weak root growth even when they had been extremely strong as seedlings before I potted them. I'm at the point of thinking it's environmental for my apartment complex and just hoping there's something I can do to keep it out of my garden. Also a bit worried if it could be affecting our health.