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
Is this mold?
Sgtchainsaw28
started grow question 6y ago
Does this look like mold? I do have a humidifier
Solved
Week 1
Leaves. White powder
likes
DrBinoc
answered grow question 6y ago
I had the same thing, I have hard water and this white dust was from the humidifier. Try cleaning your humidifier (vinegar worked for me). I say this because I see the dust on your pot too.
1 like
Complain
Selected By The Grower
Similar Grow Questions
Solved
Wadadli_Kush
Powdery mildew?
Hi I've noticed these things appear on some of my leaves over the past week or so. I'm not sure if it's powdery mildew or some other disease. Temp have been mostly 78℉ at night and 91℉ in day but humidity has plagued me with RH values of 70-90%. Can someone offer some help plz
Week 10
Leaves. White powder
5y ago
4
4
Solved
Neo09
Whats that White on leafs? How do i help this one strain? Its only this one..
Leaves. White powder
6y ago
4
2
Solved
kansasscott725
White residue - Mildew or Sugar?
Plants are giving off strong plant like smell rather than bud smell. Almost chlorophyll or ammonia like. Is the white residue on the leaves signs of mildew or does it look healthy and it's just sugar?
Week 11
Leaves. White powder
5y ago
4
3
Solved
Mazgoth
Leaves have some white spots
Today I wake up and I'm seeing this to 2 leaves,what does that mean
Leaves. White powder
4y ago
2
Solved
smurgrow
On my other grows I've had some issues with pests. The worst was white powdery mold, but I've also seen leaf miners, aphids etc. I want to treat this plant pre-emptively with something like BioNeem. Is it safe to do that at this stage of bloom? Can you recommend safe alternative
Week 6
Leaves. White powder
7y ago
3
2
Solved
WitekMajestatyczny
Small white spots on leaves in germination phase.
Does anybody know if those small white spots are ok? I have water 7 pH and I add some citric acid to lower it to 6 pH, when I sprinkle the soil I lightly sprinkle the leaves as well and I'm not sure if it's the effect of dry citric acid or something else. Thanks.
Leaves. White powder
4y ago
11
6
Solved
Bmolitor
Discoloration of leaves
Wanted to get an opinion on why the end of the leaves are discoloring
Leaves. Tips - Die
Leaves. White powder
Leaves. Color - Dark-brown
3y ago
1
2
Solved
PersianGreenthumb
What are these white spots???
What are these white spots???
Week 13
Leaves. White powder
6y ago
2
2
Solved
Breezybombaf
White tips 1st week
This is a week into veg on autos and I'm noticing white tips what could be the issue? Doesn't look like powder but I'm new
Week 1
Leaves. White powder
3y ago
3
3
Solved
cannaman9
White spots
Hi, this morning I checked out my lemonchello haze growing in coco and noticed it has small white spots on the leaves. My first guess is mold but I have good airflow and the spots don’t look spread out more so just forming in leaf. Need a little help with this one
Week 4
Leaves. White powder
5y ago
2
2
Solved
Eldritchscotchtober
Mould? Mites? Nothing?
OK, re asking this question with better photos as I don't know how to add new photos to an already posted question. Posssible mold? Spider mites? Leaves have looked kinda similar since I got them. Any ideas? To me it looks like maybe mites but I dunnno.
Week 11
Leaves. White powder
5y ago
6
8
Solved
GreenPyramid
Is this powdery mildew?
Is this powdery mildew? I am seeing some white spots starting to form on the underside and top side of lower fan leaves. Would adding an oscillating fan help prevent anymore white spots from appearing in the future or will I need to apply neem oil or something?
Week 10
Leaves. White powder
5y ago
2
1
Solved
Bean_Loves_Kush
I have noticed small powdery mildew spots on my pineapple express plant. The soil usually feels pretty dry so i don't think it is due to overwatering. I put them inside at night due to humidity outside. Should I separate this plant from the rest?
Week 7
Leaves. White powder
7y ago
5
2
Solved
zawcaz
Is this powdery mildew?
I just noticed this tiny white spot on a leaf of two different plants and having trouble ID’ing it. It doesn’t seem powdery or fuzzy and almost looks like a mineral deposit… but I really have no clue. Appreciate any ideas—thanks!
Week 4
Leaves. White powder
3y ago
3
2
Solved
TCK89
Mold? Outdoor green tent.
Its been very rainy and humid starting to get what looks like powdery mildew/mold.? Can anyone confirm ? I've taken off all leaves with it. Could use a peroxide spray and wipe off if more come??
Leaves. White powder
6y ago
1
2
Solved
supermegadjj
Golden powder on leaves starting from the bottom. ANY HELP MUCH APPRECIATED
Hi guys! I've just spotted that bottom leaves on both plants look like there was some goldish powder on them. Any idea what it is and what should I do to stop it? Any advice much appreciated
Week 3
Leaves. White powder
Other. Bugs
Other. Mold
5y ago
2
Solved
BigBeautifulWeed
White Powdery Mildew?
Could this be WPM? Never had it before and I'm super worried about it and how to fix it.
Week 1
Leaves. White powder
6y ago
3
2
Solved
Nickeluring
White powdery mildew in late flower
What's your best remedy to remove it on flowering plants? I just found it after I had forgotten to replace on of the fans when I left them for a few days. What can I do to remove it as quickly as possible without ruining the buds? I'd prefer not spraying them with milk.
Week 11
Leaves. White powder
5y ago
4
7
Solved
kopperFloyd
White spots in leaves
What are those white dots and what should I do??
Week 8
Leaves. White powder
6y ago
1
3
Solved
CuzICann_abis
Ok folks, went out to check the trichomes and smelled something funny...like mold. Saw these spots on several leaves and now I'm panicking so close to harvest. Let me know what you think and what I can do about it, if anything. Thanks!!
Week 11
Leaves. White powder
6y ago
3
1