I have a red anthurium (or so I'm told) that I'm having trouble with. I found it potless by the dumpster this summer. It was pretty dried out, so I figured it wouldn't hurt to try to save it because it was going to die anyway. It still had soil around the roots, as if someone had picked it up out of the pot and left it to die. I brought it home, put it in a bowl, left it outside my back door (north facing), and watered it to see if it would come back to life. After it did well, and I was sure it didn't have bugs, I bought it a pot that was just perfect for the size the soil and roots.
It was looking great, but when it started cooling off at night I brought it inside and now it's not doing so well. The red leaves are loosing their color, and the green leaves are getting brown spots and dying. There are still some little baby leaves that look good. They are a nice green, and look waxy.
I've always watered it outside and watered until it freely flows out of the bottom. It seams to drain well. I have noticed I don't have to water it as often as I water my spider plants.
I have not fertilized it, but from what I'm reading I don't understand the instructions for fertilizer. I do have mealworm frass which is suppose to be a good fertilizer. I put some on my spider plants and they doubled in size. I don't know if that is good for an anthurium though.
When it first started looking bad I was taking it back outside because I thought it needed more sunlight.. That was before I knew what it was. Also because the sun is changing location in the sky I had it outside my front door, South facing, instead of the back door where it was before. I now see it doesn't like direct sunlight. My little apartment isn't all that bright. I have two south facing windows, and one north facing window. Other than being in the south facing window I don't have a lot of bright light, but if it is in the window it is in direct sunlight. If I get lighting for it what does it need? Should it be directly under the light?
Other than it maybe having too much sunlight I'm not sure what else might be the problem. I live in Colorado so it's not humid here, but we did have a damp (for us) summer. I read about putting it's pot on a tray of gravel and keeping that wet for humidity. I can try it, but it won't fit in the window at all if I do that.
Could the brown spots be from water? The last couple times it rained I put the plant outside to get some rainwater. I thought it would like it better so the leaves got wet. Other than that I just use tap water.
I'll try to include some pictures so you can see what I'm dealing with. I'm really not good with plants. I can keep my lucky bamboo, and spider plants alive, and so far I haven't killed my orchid (although there is still time), but I really have no idea what to do with plants. Which is a shame because I like them so much. :-(