Looks like mushroom spores found their way into your mix which must have a lot of organic matter in it to feed the spawn.Remove all shrooms promply so they don't drop more spores. I don't think they will do much damage beside using soil nutrients that could be going to the plant.Dont overwater and let the mix dry out between waterings.The soil in the pic looks extremely saturated so unless you snapped it within 2 seconds after watering you may need much better drainage.No clue as for type of mushroom,but I would try to identify,in case it is edible or medicinal.

I did take it like literally right after I watered it bc that's when I noticed it the soil was pretty much all the way dryer out when I watered just then, any idea where the material would be coming from like in the potting mix itself or something I am doing ? Do u think I can compost these ones as well or would it just add more shrooms to my compost and then yard when it's used

Maybe your mix has a lot of peat which will reply water and drain slowly when very dry. I don't think you contaminated the mix yourself unless you hunt mushrooms and had spores on your hands.You can compost them if you pull them as they appear before the membrane connected to the cap bottom and the stem tears away.Once that happens spores will drop.This is also good to know when buying mushrooms to eat at the market.Look at the bottoms and the ones with the membranes intact will be the freshest to eat.Had some very fresh buttons today on a homemade pizza.They taste worlds better when so fresh.I'm not an expert on compost,but I think any spores that got into a pile wouldn't fare very well with all the other bacteria and fungi already in there.

They do look similar to mushrooms growing in my yard last year it's hard to remember though, they were growing where a tree was dead and the roots underneath I think they were growing from anyways o was just clearing that area for planting and thinking maybe I could have unknowingly transferred them, none were present outside while I was working in that area but could they have survived in the soil over winter and transferred by me somehow or is that a long shot lol

Hey Devin,here's a theory.The guys working at the potting mix company decided to take advantage of all the compost at the facility.So they decided to do a little side project of their own and start a mushroom farm.Things got out of hand,they missed a few and they spread through all the compost,or manure or whatever in your mix.That's how your mix got the spores and the caps do look a lot like psilosybe cubensis.

Much ado about nothing. Fungal spores are everywhere and I wouldn't worry about them at all apart from their indicating that you are probably overwatering, whatever you think. Once outdoors the fungi will either live or die according to the conditions but it really doesn't matter either way. There's no need to remove the mushrooms, they are only the fruiting bodies of the Mycellium which you can't see and can't do anything about. They won't poison your plants or garden. Just don't eat them.

I have been throwing old mushrooms in my compost for years,and there has never been any sprouting out of it.The mycellium needs stable conditions to grow to maturity and it's not a stable environment because it's getting turned( we hope ) and new material is always being added.All the microbiotic life in the pile will keep the mycellium from growing.

sheesh ...

mushrooms are one of natures biodegraders ... a composter ...

the reason they are in your pots.. your media.. is because the compost used in the media... was NOT fully finished ... or because you are reusing the media.. and now its breaking down ...

my safe rule.. is if i want mushrooms.. i go to the store and buy some ... there should be mushroom hunting clubs everywhere... if you want to learn about foraging for such .. and local peeps are best ..imo ...

when i did pots in livonia.. and being at barsons every few days.. i realized.. they never have mushrooms in their pots.. so i asked them.. if i could buy a bag of what they use ... get a DRY bag.. and store it in a garbage can in the garage for years ... covered of course ...

soooo.. upgrade your media... dont reuse it .. and dont eat mushrooms in your your yard ... imo

otherwise.. discussions on mushrooms are cool ... dont get me wrong ... the more i learn.. the less i seem to know ....

ken

ps: if you want to reuse old media.. sterilizing it can be useful ... im bummed my old link to such is gone... but try this .. it can also be done in the microwave ...

https://www.bing.com/search?q=oven+sterilized+soil&pc=MOZI&form=MOZTSB

Haha I don't really like mushrooms very much I just find them interesting when they're growing I wouldn't ever eat mushrooms I just found in my yard or anything locally they do have a mushroom hunters group I may try to go to just out of interest but I will get some from barons good call! Thanks!

As a long time and pretty experienced container gardener, I can assure you that mushrooms appearing in the soil is pretty common and typically nothing harmful to the plants. They are just the visible signs of beneficial fungi breaking down the organic matter in the mix. But they do indicate that maybe the potting soil is not the best quality, being excessively water retentive.

btw, reusing potting soil is not highly recommended. Unless a very durable, bark based mix (like the 5-1-1 or gritty mix) it collapses and compresses after a season, losing good drainage characteristics and proper aeration and should be discarded. Or at the very least, amended with at least 50% volume with new potting soil. And sterilizing is only appropriate or necessary if you are dealing with a disease issue from the previous season, in which case I'd highly recommend discarding ALL the old soil and starting fresh.

Are the mushrooms yellow? (If you have any hope whatsoever of an ID of the mushrooms, we have to know the color.)

If they are yellow, they are Leococoprinus birnbaumii, universally called "the yellow potting soil mushroom". They certainly look exactly like it, and the location (peat based potting mix) fits.....but what about the color?

OK thanks! This is the first time I've really done indoor pots and they're only in til I can transfer them outside it was new soil I just bought maybe a week before I potted them thank you for the advice bc I'll probably start indoors next year too so that is good to know not to reuse!

They're not yellow more light brown here's a pic of what they looked like today with better lighting

That's the underside of one

After the pic I took last night after watering them they got really big but I didn't get a chance to take a pic be they were all shriveled like that today

Also the stems were not that long yesterday either

btw.. i consider shrooms.. a free show of mother nature ... they are fascinating.. and never really a problem ... [and notice i didnt say free plant show.. because they arent plants.. go figure on that ... lol]

if you ever kill anything in your yard.. like a large tree .. or rose bush ... kill it dead ... for years afterwards... you will have shrooms everywhere there is a decaying root just below the surface ... wood plus water equals decomposition.. and a mushroom haven ...

i wonder if it would be safe to say ... that mushrooms in mother earth.. can mean a healthy bioculture??? ..

ken

Yes Ken the previous owners of our houses chopped a somewhat smaller tree down but left the dead stump and all roots there are mushrooms all over it and I'm assuming where the roots are dead underneath as well! They're small little brown mushrooms that grow in clusters and they're interesting to watch grow lol