The Grow Awards 2026 🏆 
Brown spots on leaves
Eotriostarted grow question 3y ago
i got those brown spots on my leaves and cant quite get on why they are there, im sure i watered enough biobizz calmag, so i dont think its that, the second plant looks just fine, meanwhile the plant with the brown spots have a lot more trichomes, really weird
Solved
Leaves. Color - Dark-brown
likes
AsNoriuanswered grow question 3y ago
Wrong ph, nothing else. Those leaf wont return, but you can push her to harvest if you start putting right one ...
Adding calmag is not a magic stick, you can overdo even ....
Thats definitely calcium issue.
ernest_twwganswered grow question 3y ago
Looks like a manganese deficiency to me.
https://dutch-passion.com/en/blog/a-visual-guide-to-cannabis-deficiencies-n987
1 like
Complain
Similar Grow Questions
Solved
Popeofdope
Leafs turning gold/dark brownI have no idea whats wrong with it. I cant seem to catch a break even outside. It allways has to be my favorite plant. Any help is appreciatedLeaves. Tips - Burnt
Leaves. Color - Yellow
Leaves. Color - Dark-brown
5y ago
2
3
Solved
MarkWatney
Black spots?Is this a deficiency, nutrient burn, or disease, growing in MG soil, recovering from overwatering as well.Leaves. Color - Dark-brown
Leaves. Color - Black or grey
5y ago
1
1
Solved
Pisolo
brown spotsI'm finding this yellow spot all over the plant , mainly in the older leafs .
I'm using drinkable water pH 7 with really low nutrients , but it's an auto and in the last grow I almost overfed my auto with little more nutrients , What can it be , maybe the water with low mineralsLeaves. Color - Dark-brown
Leaves. Other
5y ago
7
6
Solved
dirtytea
Please say it ain't bud mold :(Noticed a brown spot on my center cola last night. This morning it progressed so I removed it. I'm noticing browning on nearby leaves. It may be nute burn (I have been heavy on them), and I did recently increase light intensity to full two days ago, but my temps are ~74f. Pls no!Leaves. Color - Dark-brown
6y ago
2
2
Solved
lonergrower
Brown rust spots on oldest leavesBrown rust spots on oldest biggest leaves with curling inward - the rest of the flower is fine, just some occasional small yellow spots. No sign of pests. Maintaining pH ~6.5 but have soft water. Suspect cal/mag deficiency or nitrogen toxicity. Thoughts?9mo ago
7
4
Solved
MrGreenMan
What is going on here?Hey everyone, can someone take a look at my diary most recent pics. Sweet Amnesia Haze showing some deficiencies but no idea what it is, more micro needed? Using plenty bloom. All info in diary is accurate and coco runoff ph and ppm is on pointWeek 13
Leaves. Color - Dark-brown
5y ago
1
Solved
Jan_Jan
Flecken auf Blatt und Halm oder Helikopter-MutterDie 2 Flecken auf dem vorderen Blatt und die dunklen Stellen am Halm beschäftigen mich ein bisschen. Glaubt ihr, die Pflanze hat ein Problem oder mache ich mir mal wieder zu viele Sorgen?
VP 10. Steht im 11l BB AllMix und wurde einmal am Anfang der VP mit 3l gewässert.2y ago
4
4
Solved
potatolord111
Cut strange sugar leaves?I overwatered my plant for two weeks and not there are a lot of sugar leaves wich show like green brownish colors (not the usual just brown) and I'm asking myself if In should cut them off because of budrot or leave them to avoid stress. I'm like two weeks before harvestLeaves. Color - Dark-brown
2mo ago
1
2
Solved
FrostyCloudzz
Hat irgendwer Haushalttips?
Kann ec und ph-wert nicht regulieren oder testen bitte um dringende HilfeLeaves. Curl down
Leaves. Dropping off
Leaves. Color - Dark-brown
5y ago
4
3
Solved
Aleatoric
Possibly Potassium Deficient? Based on ALL the pics I could find, but not sure.I noticed these brown splotches and leaf edges on one area bud and pistils of my Orange Sherbet last night. Based on what I can find online, this might be potassium deficiency?
This is mostly on one spot near darkest edge when tent closed. Thanks!2y ago
3
3
Solved
SaiMutsu
N or P deficiency?Need help to understand if this is P or N deficiency. It's on the lowest fan leaves, one is more pronounced than the other, and it's mostly on one side. Stems and veins look like they're giving hints of P def but from what I searched leaves look like it could be N def.Leaves. Color - Dark-purple
Leaves. Color - Dark-brown
2y ago
3
3
Solved
Flyalivebeats
Leaves have brown spotsAny idea what these brown spots could be?Leaves. Color - Dark-brown
4y ago
1
6
Solved
tapciganin
Should I harvest early? Light stress, leaves browned and dried out, buds are all amber pistilsSo this plant has been suffering from light stress for the past two weeks or so. I have removed all the dry and brown leaves. The buds still seem fine-ish. Should I just give her the chop early and save what I can? She's been flowering for some 6 weeks.Buds. Not fattening
Leaves. Edges burnt
Leaves. Color - Dark-brown
5y ago
2
Solved
guerilla
Calmag deficiency?Hi all.
Almost certain what this is. But just need reassurance please 🙂
I just need to confirm this can be fixed with calmag?
💚Leaves. Edges burnt
Leaves. Color - Dark-brown
Feeding. Deficiences
5y ago
4
5
Solved
RaS_Audio
My plants are suffering a Phosphorus deficiancy due to lockout due to low ph of soil. My first flush only helped for a while. As soon as the medium gets too dry damage resumes. what should I do? I went to check on them today and the amount of damage they took in 24 hours was bad.5y ago
1
2
