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Back to Grow Questions
Mould on top of substrate
Dat_Maltez_Loud
started grow question 3y ago
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?
Solved
Week 1
Other. Mold
likes
Dr_Drexxx
answered grow question 3y ago
Hey ! Don’t spray it ! Looks like it’s just the great white’s beneficials bacterias and fungi that shows up. You’ll be perfectly fine.
1 like
Complain
Selected By The Grower
ChitownCannaChica
answered grow question 3y ago
Trichoderma fungi—- common and it’s a sign of healthy soil! Leave it be!
1 like
Complain
PEACEMAKER
answered grow question 3y ago
Hm ml of cal mag u use? And is it organic? It can just b salt build up no need to worry but a pic would be better, good luck 👍
likes
Complain
m0use
answered grow question 3y ago
Its not dried minerals salts from using liquid fertilizer is it? GW is a living product. some of the things growing maybe part of it. Good Luck!
1 like
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PEACEMAKER
answered grow question 3y ago
Pic for more information
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Similar Grow Questions
Solved
DinoDawg
White spot/lines on leaves
I have white spots/lines on some leaves. it will not wipe off. It only looks like it mostly on the edges. Is the mold? Temp 77 day/68 night. humidty 45-55%. fans both over canapy and under. Mars 3500 at 16 inchs. Im kinda stumped. Thanks, in advance.
Week 6
Other. Mold
5y ago
2
2
Solved
Elpicor
Strange filaments between the trichomes
Morning Growers, thanks you all! unfortunately I've no diaries for this beautiful Auto Skywalker haze, I'm a newbie and I discover Growdiaries two months ago... I'm in late flowering phase, maybe 2 or 3 days left for harvesting and I would like to ask you is this mold?
Buds. Other
Other. Mold
3y ago
2
2
Solved
Flex1
Start of rot?
Start of bud rot maybe? Only brown ish spot on the entire plant. Looks like it's just on the one vein coming from the bud. All other spots are green.
Buds. Other
Other. Mold
4y ago
1
2
Solved
Bembeto
Hojas raras
Algo le pasa a las hojas, no se si sera carencia o hongos. Me dan una mano?
Week 7
Leaves. Color - Dark-brown
Other. Mold
Feeding. Deficiences
4y ago
4
2
Solved
BlumenBot
Mold?
Is this mold on the outside of the coco pot?
Week 1
Other. Mold
4y ago
2
Solved
nancypotwin
Is this mold?
hi i got these clones from someone and i haven’t seen any growth progress at all, i’m having a hard time figuring out when to water them, and i’m a new grower (obviously) is this mold? should i just scrap these there’s 3 of them? i have 20 1 week old seedlings from bag seed..
Other. Mold
5y ago
1
3
Solved
Flauros
Trichoderma or mold ?
Who know what is this ? Trichoderma or mold? Dont understand. Cuz it appeared few days ago.
Other. Mold
4y ago
7
6
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
rando_herber
Mold on stored coco/worm castings
Hey all, I mixed together 40L of Coco and 10L of worm castings, and left it sitting with a lid. Sure enough, it has some mold growing on the top. Can I still use this medium or should I just throw it out? (Not broke, but cheap!) Thanks
Week 2
Other. Mold
4y ago
5
5
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
Rasta666
Mold???
Help! Is it mold????
Week 9
Other. Mold
Plant. Other
3y ago
7
7
Solved
Flex1
Harmful mold/rot/fungus on degrading old plant matter?
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.
Other. Mold
3y ago
2
3
Solved
buddhi_coop
Co2, temp
Are these okay levels? Been kind of hard to manage the heat in my tent. Weather here is super hot right now.
Other. Mold
Other. General questions
Setup. Ventilation
4y ago
1
Solved
Sejnik
Mám stan 1m² a v něm 9x11L květináče. Po zalití s 10-20% odtokem vody mám problém s vlhkostí vzduchu až 75%RH.Vlhkost mimo stan je 55%. Udělal jsem pro snížení vlhkosti vše (včetně přečtení všech grow questions na toto téma).Otázka je: jak ovlivní menší zálivka výslednou kvalitu?
Week 10
Other. Mold
Feeding. Other
2y ago
2
5
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
T1000
High humidity
I hit 70% of humidity this night in my growroom when I usually have 60% tops at night and a good dehumidifier is quite expensive. Any quick tips to decrease HR without one ? And if I can't, how bad is 60% average HR ?
Week 7
Other. Mold
4y ago
4
Solved
Frosty_Buds
Mould on seedling
This seed was late to spawn. Now it finally opened, even if it's quite short on the soil. I can see a fluff of mould just below the cotyledons. What should I do? Can I save it or do I risk contaminating the rest of the plants in the growbox?
Other. Mold
Setup. Seedling
1y ago
4
4
Solved
Babajipaz
Could this be mildew?
Hi all, I've been stressing out about high humidity levels in my tent, and a chemical smell when I smell my fingers after running them through the buds. Could this be mildew? Or just very frosty buds? On the microscope I see thin "hairs", but looks like undeveloped trichomes...
Week 15
Buds. Other
Other. Mold
3y ago
1
3
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
10mo ago
9
5
Solved
HiddenMessage
Is this orangish color natural , or is it a mold? Jus appears a lil odd
Week 15
Other. Mold
4y ago
1