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
BagSeedsCanGrow
Mold?
Butrytis? Week 10 flower Critical kush /bagseed
Other. Mold
5mo ago
1
3
Solved
YellahJelle
Good cover? Enough light passing? I place her at inside at night. High risk of budrot?
Is this a good cover? Quite bad weather this week, but i live in northern Europe so we have a mild sea climate. The summer is kinda over but this week is more rainy and cold then usually this time of the year. Does enough light pass the cover? I place her inside a barn at night.
Week 8
Other. Mold
Setup. Other
5y ago
1
Solved
Killerbubu
Folhas amarelas a bater nas paradas do grow
Boa noite. Depois de pensar bem, tenho algumas folhas que ficam sem luz e outras que estão coladas nas paredes do grow. Isso pode fazer isso as folhas certo?
Week 11
Other. Mold
4y ago
2
Solved
nancypotwin
white fuzz? mold? salt buildup?
hi i am a new grower and my seedlings just sprouted! today i noticed a little bit of white fuzz looking stuff and wanted help identifying it... the lighting might make it hard to see. i tried to include the edge of the pot so you could see the little white dots there as well
Other. Mold
Setup. Seedling
5y ago
1
1
Solved
nanaboham
How do I reduce humidity
I have my grobox in the loft but it's got very high humidity 60-80. What's the best way to get it down to 40-50% for flowering? I already have a mini dehumidifier, 2x fans in the box. A dyson cool fan outside the box. Any tricks? Can't afford to spend mad money
Week 5
Other. Mold
5y ago
3
4
Solved
BlumenBot
Mold or spiders?
Is this mold? Is the whole harvest ruined or just the buds that show mold? This is the main cola on an untrained plant.
Other. Bugs
Other. Mold
Other. Harvest - Drying
4y ago
1
4
Solved
Killerbubu
Distancia mínima ? LED 310w
Boas pessoal, Qual e o mínimo que se pode por a luz no estado de vegetação ? ( Distancia ) A minha questão e logo as primeiras semanas.
Other. Mold
4y ago
1
2
Solved
Killerbubu
Distancia mínima ? LED 310w
Boas pessoal, Qual e o mínimo que se pode por a luz no estado de vegetação ? ( Distancia ) A minha questão e logo as primeiras semanas.
Other. Mold
4y ago
1
2
Solved
MMSC16
PM covered plant sentenced to death - What would you do?
I'm about to destroy this plant. Each branch has heavy PM despite having ample airflow. I suspect due to the lack of direct sunshine, but I'm sure it's spread to other plants which will also be destroyed. Is there anything I can do to salvage? What would you do? Thanks!
Week 15
Other. Mold
1y ago
6
6
Solved
Rasta666
Mold???
Help! Is it mold????
Week 9
Other. Mold
Plant. Other
3y ago
7
7
Solved
Lord_Indica
Brownish spot on bud, bud rot or no worries?
Hey there! I've noticed a wired brownish spot a bud and I'm worried that it's bud rot. I took the spot apart and there was no visible white mold. Is it bud rot?
Week 12
Other. Mold
5y ago
1
1
Solved
Varkhond
Please help me with my height problem! I only got 160cm of total tent height, the pot is filled to 20 cm height mark, slighty under the 7 gal.. Just checked the plant after work now and it has grown alot more sadly, just measured 93 cm excatly. So 93+20=113cm out of 160 total.
Week 6
Other. Mold
7y ago
4
4
Solved
sndwich
Grow tent - Post Rot
Hey guys, All harvested and finished, cleaned the tent out, just hoovered, but do I need to do anymore cleaning as had some rot issues with the last grow, will the pores hide in the tent etc or over worrying? Thanks again D
Week 15
Other. Mold
Plant. Other
Setup. Other
5y ago
3
2
Solved
mike88
Can you spray water on bananas while they're still on flowers (around weeks 5/6/7) ?
had a few plants herm around week 6 of flower. can i spray bananas with water FIRST (to kill pollen) then remove with tweezers? Worried about active pollen spilling. I've heard pull with tweezers and put in a cup of water. Don't want mold/mildew/etc. though!
Buds. Other
Other. Mold
Other. General questions
5y ago
1
2
Solved
Pechu420
Fear of mold
Are these signs of mold? The humidity here is very high, the fan is on, but it's complicated. I see no signs of powdery mildew. But could it be some other type of fungus?
Other. Mold
1y ago
9
5
Solved
DurbanDad
White spots on lower branches
So this last week a few lower branches developed white spots that seem to cause deformation. Is this some kind of mold and do I need to do something about it? I’m worried it will stress if I let it be. Thanks in advance!
Week 22
Other. Mold
4y ago
3
4
Solved
GalaxyToteBabe
How much taller is she going to get? Every time I try to LST I end up supercropping or topping and I don't want to do that but I am running up against a space maximum.
Week 7
Other. Mold
7y ago
2
2
Solved
T1000
Top bud turning brown
Can anybody tell me what is happening to this bud ?? It's not burnt by the light because this one is the lowest of my girls. Maybe it is rotting because of high RH idk. Please help
Buds. Other
Other. Mold
4y ago
8
Solved
SavageGarden
I felt that I might get mold problems cause of high humidity, and saw an little yellow/brown under the top bud. Has just opened a bud and could see mold in one place on a bud under top bud. Should I chop plant now? Or should I just remove that one bud? :(
Week 13
Other. Mold
5y ago
1
1
Solved
NanoGrow
Stem rot/Botrytis
How would you deal with stem rot at very initial stages? We dusted with cinnamon, sprayed with H2o2, scraped the affected area, wiped dry and coated with candle wax to seal the wound. Check this week's recent diary photos for more details on how it looks atm.
Week 11
Other. Mold
5y ago
2
2