I noticed these small white "balls" spreading rapidly on top of the soil of two adjacent plants.



When I repotted the plant, I noticed that the whole soil was full of it. Here's a good picture of some remaining balls sticking to the pot:



Since I didn't see any insects, I assume it's some kind of fungus or mold? Is it harmful to plants or humans? If yes, how can I get rid of it? Thanks for any leads!

I heard that it means your soil is nutritious: It has feed for other things to grow on. And it is not harmful for the plant.
I am interested what others will say as well, as I recently got the same thing

OnionLincoln said:
. . . I heard that it means your soil is nutritious. . .

Can you cite your source beyond "I heard that"?
Some months ago there was an extended debate in these pages about whether those were eggs or fungus. I don't recall a resolution.

Well
Here is a post with "eggs" that look similar. On that forum they called it

Reddit said: Mycelium of Leucocoprinus birnbaumii

https://www.reddit.com/r/whats...

Reddit said: It looks like that plant is a succulent, so the presence of mycelium means the soil is likely too organic and staying moist for too long after watering

What grows in my soil looks a lot like Leucocoprinus birnbaumii and my Chlorophytum comosum is not enjoying this soil.
My aloes are fine with it for now

I think it's fair to conclude that the white dots are fungal mycelium, but other than a reddit post, I can't find a definitive source to show that it is Leucocoprinus birnbaumii, aka Flowerpot Parasol.

I'm not saying it can't be and would love to know for certain, but unless you know something to be 100% accurate, it is customary to back up your replies to questions with reliable data and sources.

https://en.m.wikipedia.org/wik...

https://plants.ces.ncsu.edu/pl...

it's a saprophytic fungus feeding on organic matter in the soil. Non-infectious to plants or humans. Not certain of specific genus or species. I just ignore it.

NMoasis said: I'm not saying it can't be and would love to know for certain, but unless you know something to be 100% accurate, it is customary to back up your replies to questions with reliable data and sources.

True, but OnionLincoln offered a guess and even said, " I am interested what others will say as well."

If that guess is based off Reddit, so be it.

Just saying it was a response from someone trying to offer advice and straight saying this is what I heard/read but looking forward to other ideas.

Not many people cite data and sources in offering opinions my friend.

CPPgardener said: it's a saprophytic fungus feeding on organic matter in the soil. Non-infectious to plants or humans. Not certain of specific genus or species. I just ignore it.

Everybody wins:)

Thanks a lot for all the answers