Check the winners The Grow Awards 2026 🏆
Start My Diary
Start My Diary
Log In
Start My Diary
Home
Diaries
Strains
Shorts
Questions
Contests
Growers
Seeds
Breeders
Nutrients
Equipment
Blog
English
Log In
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? 😪😪 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!👉😁👈
1 like
Complain
Selected By The Grower
Similar Grow Questions
Solved
MicroNighthawk
Maui Waui CA deficiency?
Can anyone confirm or guess at the kind of deficiency my plant is having? I am not sure if "hard water" (instead of RO so far) is the right answer or if I need some special sauce... Thank you! Details here: https://growdiaries.com/diaries/139533-grow-journal-by-fejg87fb2skvf
Week 9
Leaves. Color - Dark-brown
4y ago
2
3
Solved
BucerosRhinoceros
Brown spot on leave. 6 weeks into flowering. -Temp 27'C day 25'C night- HD 65% day 75% night . Soil PH 6.5-7.00. Water always at 6.5-6.8ph.
I just flush it 4 days ago because I think it got calmag lockout since I always give them around 5ml of calmag every watering. I only water when 2inch top soil dry with 1.5L of ph balance water. Not a fungus or anything that grow because It cannot be rub or remove from outside.
Leaves. Color - Dark-brown
4y ago
5
3
Solved
Ag10KSA
Since i have bad judgment on colors ...Please can someone tells me what is the percentage of cloudy and clear colors in here?? This is 6 week fast flowering strain but she is starting week 8 in day 55 flowering..flushed 10 days ago tho .help plz
Week 8
Leaves. Color - Dark-brown
7y ago
4
6
Solved
Mr_ROCKET
What are this dark blurs?
Today I found this dark brownish/bluish blurs on these two leaves. Does anyone know what are they? My plant is on her last weeks and I am not feeding her but with ph'ed water.
Week 10
Leaves. Color - Dark-brown
Leaves. Color - Mottling
6y ago
3
3
Solved
Magic43562
Brown spots
Brown spots only on 1 leaf, is this a problem? Wasn’t there this morning
Leaves. Color - Dark-brown
6y ago
4
3
Solved
beetyjooce
Deficiencies
Hey guys, First two pictures are from one plant and the third is from another. Any idea what the issues are? First two pics I’m thinking phosphorous? The markings are only in one section though. Second I’m thinking cal mag? Thanks everyone
Leaves. Color - Dark-brown
4y ago
1
1
Solved
McLovin69
Tips of leaves look burnt??
Day 12: Started noticing little brown marks on the edges of a couple of the leaves. Don't know what to do or what caused it. Thank you in advance for any help!
Week 2
Leaves. Edges burnt
Leaves. Tips - Burnt
Leaves. Color - Dark-brown
6y ago
1
2
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
AUTOASSASSIN215
Heat stress or Root rot ??
Hey my 7 month old plant not doing too good the leaves are turning brown and crispy Might be heat but then again Might be bud rot and it’s spreading like wild fire also i notice not a lot of flowering growth idk weather to chop it down or keep fighting
Leaves. Tips - Die
Leaves. Color - Yellow
Leaves. Color - Dark-brown
5y ago
2
Solved
ssfm_ssfm
Are those nutrient defficiencies? Which ones?
A plant had interveinal chlorosis on new leaves and then proceeded to show brown patches between veins on middle leaves. Another has coppery brown spots on leaf edges on the middle of the plant. Both were rootbound in living soil (peat/perlite/hummus + ammendments).
Leaves. Color - Dark-brown
Feeding. Deficiences
Techniques. Topping
2y ago
1
Solved
Grow_for_Happiness
Should I be worried or just a weirdo?
Trying to figure out if I should be worried that this plant looks so different than her sister. Same strain, same everything, even watered from same bucket at same time and amount. Last runoff 6.6ph Checking runoff again tomorrow when water. Herm or just a weirdo? #5 normal one
Week 11
Leaves. Curl up
Leaves. Color - Dark-brown
Plant. Other
3y ago
3
4
Solved
jbirdstheword
Burn, deficiency or other?
I’m completely stumped as to why my one plant is showing signs of deficiency or burn. Used the exact amount of fertilizer per plant. One plant is fine and the other looks terrible. I used a half dose of cal mag and it seems to have stopped but is not drinking or looking better.
Week 7
Leaves. Curl down
Leaves. Color - Dark-brown
Feeding. Deficiences
5y ago
3
2
Solved
RRuffin
Blattprobleme bei Pflanze (Wahrscheinlicher Kalziummangel?)
Ich habe 2 Pflanzen in Zelt und eine der Pflanze zeigt ziemliche Mängel. Viele Blätter sind mittlerweile gelb mit braunen Flecken. Die andere Pflanze hat diese Mängel aber nicht, beide wurden gleich gegossen, etc. Ich habe vor ein paar Tagen DolomitKalk und Worm Casting benutzt.
Week 11
Leaves. Edges burnt
Leaves. Color - Yellow
Leaves. Color - Dark-brown
1y ago
7
4
Solved
blasterw32
Brown stains on leaves edges
The top leaves on my GG#4 started to get brown on the edges. Initially I thought it was light burn, but the stains kept progressing after I readjusted the light distance. Is it a nut burn?
Week 8
Leaves. Color - Dark-brown
6y ago
1
1
Solved
Mysteriogo
Dead ?
Hello guys, My flowers seem dead, trichomes are not changing since 3 weeks. + Leaves are really horrible (that's broke my Heart) Do you think I should harvest ? That's really clear trichomes and not milky... Still thc in there ? Colombian jack strain, smth about week 27 ?
Leaves. Color - Dark-brown
Other. Harvest - Drying
4y ago
5
4
Solved
jaydee702
burnt tips on leaves during flowering
how do i keep my leaves tips green during flowering ive been getting burnt tips about midbloom of flowering ive tried less P K and more P K but still have the same burnt tips on my leaves when flowering
Week 14
Leaves. Color - Dark-brown
3y ago
3
4
Solved
hannabis420
What am I doing wrong??
I think its mold, white sticky like webs on nugs and leaves only a couple nugs on my 1 plant other is fine....
Leaves. Webbing
Leaves. Color - Dark-brown
Other. Mold
6y ago
3
2
Solved
diamondtrichomes
I added a couple pics of what looks like rust spots on the leaves of only the tall plant in 7 gallon. I’ve given these two plants the exact same feeding so not sure what is causing it.
Week 5
Leaves. Color - Dark-brown
8y ago
2
2
Solved
elevensixty6
Spotting issue consistent in all my grows. Have always thought Cal deficient but more Cal never fixes the issue. PH always checked with 2 PH pens 6.2-6.8.
Always pops up around the same time in flower.. week 4/5. Brown irregular spots and occasional curling down on the fan leaves. The only things I have consistently used in all the grows is the LED light, RO water, and CALiMAGic. Switched to dry organics but now its back. N toxic?
Week 8
Leaves. Curl down
Leaves. Color - Dark-brown
Leaves. Other
4y ago
7
6
Solved
Kenny82
Browning sugar leafs on autoflowering skunk#1 during week 5vof flower
Using soil and organic dry amendments, I'm doing autos and in week 5 of flower, noticed browning on my sugar leafs but don't no what I should do, should I leave it or should I try to sort it just not sure how?
Week 5
Leaves. Color - Dark-brown
3y ago
2
4