If you are having fungus gnat issues you are either overwatering your plant or the plant is in a bad quality potting mix.

The best way to get rid of them is to either adjust your watering, or move the plant into a proper draining mix.

Imontestella: Ah, I forgot the picture, thanks for reminding me.

If you think I'm fertilizing too often, I'll stop for now - thanks for the tip.

I added the sand after reading it recommended in several places and after trying every other recommendation with no success. The fungus gnats originally came from another plant. The sand has been there for several months, and the plant was doing well until a few weeks ago, when a couple of the new leaves shriveled. The wilted ones in the photos have since fallen off, and the remaining leaves are healthy-looking. I saw last night two places where new leaves will emerge, so the plant may be recovering already, but I wanted to check anyway to see if such a thing could be linked to colder temperatures or to overwatering, not enough light, etc.

Thanks for your advice!

MrBlubs: The fungus gnats came from another plant, which I did take care of. I may still be overwatering this one, though. I'll try spacing out the waterings more and see if any more leaves start to wilt. For now only a few leaves wilted and fell off; the others are fine. Thanks!

Are we convinced this Is a Peace Lily? If by that you mean Spathiphyllum it looks a bit weird. Have you seen it in flower?

Are you sure that's a Peace Lily? Leaf shape in some shots that looks like Anthurium.

I still think you'll need to correct that soil, doesn't bode well for future.

Thx for the pix & thx too Mr. Blubs for assisting w/ the pix.

I think you're right, actually. I was given it as a gift and told it was a peace lily, but it looks more like Anthurium than Spathiphyllum. It had a flower when I got it (2 years ago), but it hasn't flowered since.

I'll look for a better soil. It's a bit difficult because I'm in Switzerland but I can't read German very well. The potting mix that I got when I repotted it was the closest I could find to the original soil consistency. If the problem is poor soil drainage, would it help to mix in some peat moss? If it needs a very specific soil I think it will take me a while to find that here.

Thanks again everyone, this is really helpful.

No pls do not add peat; that's part of the problem in that soil & peat will be attractive to fungus gnats so again, no peat pls. FYI: Peat impedes & slows drainage, the opposite of what we want here.

Do you recall if the flower was white or colored?

I know that peat moss holds water, but it also doesn't compact, which should help the rest of the soil drain. If I water less frequently to compensate for the water retention then that seems like it should help. And it's something that I know how to find here (:

If I remember correctly, the flower was slightly pink. I think it's definitely Anthurium.

ktpurr - I'd strongly reiterate the advice not to add peat. And anyway how would you 'add' it without repotting the plant? Just putting peat on the surface would not help at all. If you can't mix your own soil look for a bag of Zimmerpflanzenerde and it will be ready mixed for house plants.

Sorry, I must beg to differ, Peat DOES compact, becoming hard & brick-like then repelling water. Big problem.

Not trying to give you a hard time, but if you're going to water less, to compensate for questionable soil, pls be reminded these are Tropical plants, which suggests needing high humidity.

I asked the color to help the ID, I believe PL only bloom white, so that does say Anthurium, if light pink.

Currently I grow both myself. Good luck & enjoy!

Thanks for helping me to correctly identify the plant I have. That has helped me find information regarding it's care, which seems to be a bit different than for peace lilies.

floral_uk: Zimmerpflanzenerde is exactly what I have now and what seems not to be working very well. It's the best thing I could find in my area, though. I know I need to repot the plant, but my issue is that if this soil is not the right one for my plant, then I'm not sure what other kinds are available to me, so I'm trying to think of the best solution that I think I can manage.

In every online resource I could find, the recommendation for anthurium is a soil composed of sphagnum peat moss, orchid bark, perlite, and sometimes regular houseplant soil. Orchid bark is something I've seen around here, so I'll see what I can do about that.

Karen: Thanks for the tip about keeping the humidity high. I have been wetting the leaves of the plant (also to keep off dust), but I also saw today a recommendation for a tray of water with large pebbles in it so that the pot can sit on the pebbles, keeping the roots from becoming waterlogged, but the plant can enjoy the humidity as the water evaporates. It also looks nice, so I might try that out as well as misting the plant every day.

I'll see what I can find to add to the soil to help it drain better. Thanks to everyone for the help!

Not to be too confusing, but "sphagnum peat moss" is not correct, it's sphagnum moss or peat moss which are two different things.

Sphagnum MAY help. Peat moss is our current problem & is conducive to fg.

Pls forget wetting the leaves, that does nothing & may introduce rot.

DO use the pebble tray, which I commonly use actually under BOTH of these at my home. I give them pretty similar care which is working just fine.

Don't follow every online resource, not all are reliable. For most reliable read the blog Plants are the Strangest People by Mr. Subjunctive. His is advice to follow.

Karen/Lena

If you are already using Zimmerpflanzenerde then the problem is more likely to stem from over watering than the mix itself.