The Grow Awards 2026 🏆
Start My Diary
Start My Diary
Login
Start My Diary
Home
Diaries
Strains
Shorts
Questions
Contests
Growers
Seeds
Breeders
Nutrients
Equipment
Blog
Login
Sign Up
Following
Follow
Brands
&
Growers
to get updates
Back to Grow Questions
Harmful mold/rot/fungus on degrading old plant matter?
Flex1
started grow question 3y ago
Mold/fungus? Harmful? Haven't seen something like this in my living soil and I suspect it could be from high moister or humidity level. Its only seen on old dead cover crop.
Solved
Other. Mold
likes
Organoman
answered grow question 3y ago
Not harmful at all, actually beneficial for your soil biology.
1 like
Complain
Selected By The Grower
GrowingGrannie
answered grow question 3y ago
I wouldn't worry about this... not at all... if it's just the old, dead cover crop, it's naturally decomposing... Good luck!
1 like
Complain
Flex1
answered grow question 3y ago
Update: seems fungus related not mold. Not certain it's harmful rather just part of living soil.
likes
Complain
Similar Grow Questions
Solved
buddhi_coop
Infested or no?
Are my leaves infested? If so, how do i get rid of it in late flowering? My other plants leaves look normal (last couple photos)
Other. Bugs
Other. Mold
Other. General questions
5y ago
1
1
Solved
Faegrows
Is this normal or mold?
Is this normal color for orange critical punch? She is darker than last week at a few buds. I just want to make sure this normal or a form of mold or something. I'm harvesting her in 7 days. She is starting flush now.
Week 20
Buds. Other
Other. Mold
Other. Harvest - Drying
4y ago
4
2
Solved
Frm11001
Alguna ayuda? oidio: Sphaerotheca macularis
Hola!, estoy en la semana numero 11 de mis automáticas, cerca de la cosecha y he descubierto inicios de este hongo en varias hojas, parece ser leve pero me preocupa y no sé que hacer, tengo 4 automáticas y 1 esta infestada, hoy he descubierto que otra esta comenzando también!
Other. Mold
5y ago
2
Solved
unlegitTand
Fungus on plant
I know where it comes from... I was too stingy and didn't want to turn on the heating on cold rainy days- air too humid. Can I somehow save the affected bids or do I have to remove them? ( Just fan without heater I’ll have about 10*C)
Other. Mold
1y ago
5
Solved
amazongrow
Is this stem rot?
I am reveging this girl. She had a little mold at the end of flowring and it looks like it is still here and growing from the stems up... they appear mostly on branches without any new green revegged growth... detailed pic is from mic So, what do you think? H202 Bath? Clones?
Week 6
Other. Mold
3y ago
4
2
Solved
WulfBlud
Mold/fungi or am I paranoid
I have never seen all these white strands when looking at the trichomes so I was just wondering if this could be any time of mold of fungus? It doesn’t seem like it when looking at it but I have never had buds this dense and close together so just wanted to be safe.
Week 10
Other. Mold
3y ago
2
3
Solved
qoodwater
Rain and harvest
Should I cut?? Or risk the rain??! In 1 week it will rain!!
Leaves. Tips - Thick
Other. Mold
Other. Harvest - Drying
3y ago
2
3
Solved
Elpicor
Smartpot harmful mold?
Hi guys, in the last two weeks a kind of mold has formed in the lower part of the smartpot, should I be worried? plant doesn't seem to have anything at the moment, the humidity is at 35 40% max, daily temperature max 30, min 20, do I have to flush to cleaning organic residual?
Other. Mold
3y ago
3
2
Solved
babajana
is it mold?
can someone help and tell what is it? its looks like mold but why and how i can help?
Other. Mold
5y ago
3
Solved
Dutchhobby
Stem rott
So lots of rain and could not put her dry.now I've got stem rott.i think.she must bloom till end oct.one spot is main stem.can I fix this or is it to late..buds seem okay.
Week 13
Other. Mold
3y ago
3
3
Solved
BearSmalls
Is it mold?! Help!
Is it mold? These little white hairs in the ground? Soil: BioBizz Light Mix If so, how to eliminate it? Mold has already appeared on top of the soil before. Then I removed it and I've poured fresh soil and cinamon.
Other. Mold
5y ago
1
1
Solved
iopiopiop
WPM! Help!
Soooo... today I found some quite heavy WPM between buds. Just a few sugar leaves were completely coated in white. So I lowered the rel. hum und sprayed the buds directly with h202. (non-diluted) Will the plant survive untill harvest? Shouldnt I have not sprayed the buds directly
Week 12
Other. Mold
6y ago
1
2
Solved
Dat_Maltez_Loud
Mould on top of substrate
There is some sort of mould on the top of the substrate. I think I will spray it with diluted hydrogen peroxide. Is this a good Idea?
Week 1
Other. Mold
4y ago
3
4
Solved
Herikus
Help, what are those weird yellow spots in late veg?
Hello everybody, I've checked in on my plant after I was away from home for 2 day. Now I come back to see these ugly yellow spots? During day 23°C / 55% humid. During night 18°C / 50% humid. Checked the whole bud, but no insects. My other ideas are mold or stress from the light?
Leaves. Color - Yellow
Leaves. Other
Other. Mold
1y ago
1
2
Solved
ZuriEn
Need to buy fungicides?
What is that?
Other. Mold
Roots. Other
2y ago
1
Solved
BoboLacetti
Funguns?! or normal? Deep Water culture + Top Feed
Hello, I started my first hydro dwc grow. It's a DWC with top feed (I always had that on). Is that a fungal infection on the trunk? and if so, how bad is it? what can you do? Or is that quite normal in a DWC with top feed?😱
Other. Mold
Setup. Strain - Autoflowering
Feeding. Automatic systems
1y ago
1
1
Solved
amazongrow
Mold and Harvest time
Hey bros, take a look at the last Day 102 pics, mold... what do you think? Does not smell like it, comes from outside. Looks like a bunch of white pistils together. I've cut one of to examine further with the mic. I will update the pics later. Oh, and also, one more week to go?
Week 14
Buds. Other
Other. Mold
6y ago
5
6
Solved
thenewdude
is she a goner?
hello, I'm a bit stuck, one of my seeds got mold during germination, I dabbed it off fully carefully, planted it, and let it dry up before giving it the second watering. stem is weaker then other one, now slightly damaged. will she survive ?if no I need to throw the soil out righ
Week 2
Other. Mold
Plant. Stem - Weak
6y ago
4
3
Solved
AvoidingBananas
Mouldy, webbed buds
The humidity was too high when I went away and now my buds are mouldy. Obviously I’m heart broken (mainly at my own stupidity because I should know better!) and I wondered if there was anything I can do to recover some of the crop. Can I wash? spray? Dry out…basically anything?!?
Buds. Other
Other. Mold
3y ago
3
Solved
Drgreenfun
I'm gonna train this one maybe super crop when do I start my training?... I've already topped them.
Week 4
Other. Mold
7y ago
3
3