The Grow Awards 2026 š
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
brown spots on leaves
Wannabean
started grow question 5y ago
Got some brown spots on random leaves for about 1 1/2 veck ( Only smallest girl ) it seems not to spread to the others. what is it? šŖšŖ Peace
Solved
Leaves. Color - Dark-brown
likes
Crawlndog
answered grow question 5y ago
Looks like it has similar symptoms to pH fluctuations. If it was my grow, I would check the pH of the water/food before and then check the run-off after watering. Happy Growing!ššš
1 like
Complain
Selected By The Grower
Similar Grow Questions
Solved
SolitudeCorners
Curl up and brown spot leaves
Leaves curl up and has brown spot around their blade is it potassium deficiency or salt built up? thank for any advice
Week 17
Leaves. Curl up
Leaves. Color - Dark-brown
5y ago
1
1
Solved
BudsRus
Brown spots
Had issues with this plant since day 9- it collapsed so have added support It's now around 2 weeks old and is developing a brownish colour with some clear spots Please see pictures for a better description
Leaves. Color - Dark-brown
5y ago
3
3
Solved
Babajipaz
Browning tips
Hello everyone, I'm in 3rd week of flowering and I'm starting to stop browning tips on newer leaves. Any idea what it could be? Thanks!
Leaves. Tips - Burnt
Leaves. Color - Dark-brown
2y ago
2
2
Solved
Grishka
Can you identify the issue?
Leaves turning yellow and brown and curling at the tips
Leaves. Color - Yellow
Leaves. Color - Dark-brown
5y ago
2
Solved
Shotiie
Still deficiency? Or wrong diagnosis?
Hi I have a cal mag deficiency it appears? I gave her some calmag yesterday about a half liter (from a gallon/5ml dose) bc she's already wet. How long does it take to correct this? I also have been spraying the leaves. OR did i diagnose wrong?
Leaves. Color - Dark-brown
5y ago
2
Solved
TheNoobDude
Nutrient lockout, ph imbalance or nutrient burn?
Unfortunately I don't have a ph meter, so my best guess is one or more of these problems: nutrient lockout, ph imbalance or nutrient burn. The first 3 photos are from an Auto Northern Light and the last 2 are from an Auto Jack Herer.
Week 6
Leaves. Edges burnt
Leaves. Color - Yellow
Leaves. Color - Dark-brown
5y ago
1
1
Solved
Jake13255
What is this deficiency?
They started off with some brown spots and progressed. Is this phosphorus? I have been feeding with .5-1ml of dyna grow bloom and 2ml of cal mag per gallon watering at about 6.3-4 ph. But i recalibrated my ph pen and did one water since.
Leaves. Color - Yellow
Leaves. Color - Dark-brown
5y ago
4
4
Solved
yatzi
Leaf spots!
Leaf septoria or nute deficiency? Don't have ability to monitor pH or ppm. Do I cut the affected leaves off or any other home brew solution? 3 different plants in the photos.
Leaves. Color - Dark-brown
5y ago
1
5
Solved
Growmun
Good grow
Week 2
Leaves. Color - Dark-brown
7y ago
2
1
Solved
Ramoset
Hello guys, what kind of problem could this planta have? These are autoflowering plants.
Leaves. Tips - Burnt
Leaves. Color - Dark-brown
2y ago
1
1
Solved
Herbyfirby
Brown spots on some newer but not new
Iām 6wks into gorilla cookies and some of the leaves have developed brown spots only on the ones close to the top of new growth
Leaves. Color - Dark-brown
2y ago
1
1
Solved
Complicate
Is this turning purple from temp change
So it looks like what I thought was a brown spot (under the grow light), appears to be purple when I pulled it out to get a better look and stake it down. I did switch the light to something cooler, could this be from temp dropping. Not worried yet, just curious. Thanks
Week 4
Leaves. Color - Dark-purple
Leaves. Color - Dark-brown
6y ago
1
1
Solved
jbirdstheword
Fungus or deficiency?
I have these gals growing outdoors and have a few leaves that look like this. Appeared after multiple heavy rain days. Applied nutrients yesterday so I still need to wait for the results. Is this a sign of fungus or deficiency?
Leaves. Color - Dark-brown
5y ago
1
6
Solved
tavaresf
Yellowing and brown spots on leaves
Can anyone identify why this is happening? I am growing 2 other plants (one the same strain) with identical treatment and this started happening with one of my Royal Jacks. Everyday new leafs show the same symptoms.
Week 6
Leaves. Color - Yellow
Leaves. Color - Dark-brown
5y ago
2
2
Solved
Troy_McClure
soil ph is erratic fox farm ocean forest : pro-mix (3:1) - ph 6.3-6.8 run-off ph: plant 2: 4-6 plant 1: 5-6.8 watering / feed ph: 6.3-6.45 soil ph after water /feed: 5-7 soil ph when dry: 7.5-8 both plants treated 100% the same phosphorus deficiency / ph imbalance help please
Week 10
Leaves. Color - Yellow
Leaves. Color - Dark-brown
Plant. Stem - Red or purple
6y ago
4
3
Solved
Rafaelko
Which deficiency could that be?
Help me please to find out the deficiency of the Royal Gorilla Automatic š³ 4 Veg Week. Temperature 25-27 degrees RH 60-75 60% soil - 20% coco - 20% perlite Feeding Chart GHE FloraTrio pro 1 Gallon: 5ml CalMag 4 ml Micro 5ml Grow 1ml Bloom I did not spilt water on the leaves
Leaves. Color - Dark-brown
6y ago
1
1
Solved
Smoking_Joe_Frazier
Nutrition deficiency or nute solution on leaves during watering?
Hi Growmies,during my monitoring routine I found some brown spots on the leaves. Not many but on some leaves the brown spots have become transparent and I can see through the leaves. Any ideas what could have caused the brown spots? Perhaps not enough CalMag? Rest looks healthy.
Week 6
Leaves. Color - Dark-brown
1y ago
4
3
Solved
Aliatif
What should ı do for these brown spots? Ph is ok, fertilizer is ok but didint recover. Should ı flush my plant with 6.5 ph water?
Week 9
Leaves. Color - Dark-brown
7y ago
3
3
Solved
Ap0_DrX
I have this symptom, a pattern of rust spots happening on new leaves, I have checked medium PH, which is around 7.5. I think it is Boron Deficiency caused by The medium PH not being approximately 6.5. I need more suggestions, What do you guys think?
Week 10
Leaves. Color - Dark-brown
3y ago
1
2
Solved
CrankledLarkus
Ongoing brown and yellow patches forming in week 6 of flower
I've also noticed today a couple leaves looked wet, so tried to wipe it off but that did nothing. I took 2 pictures of the same leaf at slightly different angles to see the shine. It's only the skunk effected (closed similar question prematurely in skunks diary)
Week 14
Leaves. Color - Yellow
Leaves. Color - Dark-brown
6y ago
3
2