The Grow Awards 2026 🏆 
Is this mold?
DrBinocanswered 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.
Similar Grow Questions
Solved
Monkeyboy
Found her bent over!!Hello out there, thank you everyone that has give praise, tip and hints.
I went out this morning and seen she was bent right over, top heavy me thinks. I put in a stick and tied her to it. Do you think she will be OK? Plus there seems to be a white powder on the leafs, is this O?Week 5
Leaves. White powder
5y ago
1
2
Solved
HighPinePharms
Is this normal?Is this bugs or Fungus growth. It is not on any of the other plants just this one, I was misting the past couple of days put stop noticed light burn on leaves, keep temp between 76-80 and humidity 60-70%, I noticed this on the 14thLeaves. White powder
Leaves. Other
3y ago
2
2
Solved
Nickeluring
White powdery mildew in late flowerWhat'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
OleGrow
Powdery Mildew near end of floweringFor the last few days, powdery mildew is starting to form on the leaves and some of the buds. I've cut where mildew was, lowered humidity to around 45% and increased air circulation by focusing a fan on the plant but it is still forming. Anything else I should do?Week 10
Leaves. White powder
5y ago
1
2
Solved
grzegorzdelaurans
FAN LEAVESthis are fan leaves.......are those thrips or some other kind disease?Week 12
Leaves. White powder
2y ago
8
6
Solved
Cmjrhorse
1 falling 2 thriving but I think the mildew is floating over. OutdoorI need help. The last pic was my least healthy plant. Powdery mildew. I am not over watering due to heat I’ve been at 3.5 gallons but soil is dry every morning. I’ve cut her bald she will prolly stress out. Every day more white. Should I just kill it and preserve the other 2 or kWeek 21
Leaves. White powder
4y ago
3
3
Solved
Happyfox
White dots on the leavesHello!
There are white dots on the leaves can it be because the light was too close? The plant is 7 weeks old
🕊️Leaves. White powder
4y ago
4
4
Solved
MrGrowthSpurt
White Powder on LeafHere's a closer shot of the white powdery stuff, only on one leaf right now. I'm going to keep an eye on it and try not to worry for now. If I suspect it's mildew, mold, or Fungus I will take action. What does it look like it could be to you all?Week 3
Leaves. White powder
4y ago
2
3
Solved
R2d2420
White powder on leavesGot like a white powder on my leaves on one plant veg stage. Thinking it's some kind of mold but it's only on one plant out of 10 in 4x4 tent . Getting more & more of it but staying in that one plant..I moved her around so she'd get more wind. 2 weeks before she goes outsideLeaves. White powder
5y ago
8
6
Solved
Bmolitor
Discoloration of leavesWanted to get an opinion on why the end of the leaves are discoloringLeaves. Tips - Die
Leaves. White powder
Leaves. Color - Dark-brown
3y ago
1
2
Solved
DoneWithIt
White Spots on top of LeavesI have discovered white spots on my plants. I think it is white mildew. From what I have read, the spores cannot be killed. You can only stop them a with pesticides or, if you are lucky, with a milk/water mixture, but you cannot remove them completely. What should i do?Leaves. White powder
1y ago
3
3
