The Grow Awards 2025 🏆 
By continuing to use the website or clicking Accept you consent to our cookies and personal data policy and confirm that you are at least 18 year old. For details please see Privacy Policy and Terms
Accept
Weird Brown Spots on Leaves
Infoismstarted grow question 4 years ago
What’s going on with leaves? I think it could be soil ph, but I’m not really sure. Week 4 of flower rn.
Open
Leaves. Color - Dark-brown
likes
Answer
CRiSPrGrowanswered grow question 4 years ago
it's soil pH, fix it with beneficial bacteria or humic acid. Hope this helps ! 🚀
1 like
Complain
Southofheavenanswered grow question 4 years ago
Mm the leaves are looking rather sick :/ but brown decaying spots can be water spots where existing leaves prevent other to get enough air. The leaf veins are pretty dark, if its a nutrient lock out then your ph is out, a real solid flush can help. Id stay away from nutes for the next wee while. Good luck mate! Il look up some proper info for you
likes
Complain
Mr_Weeds_Autosanswered grow question 4 years ago
This does look like a problem with ph, it looks like it's got so bad that it's causing a lockout. You need to check the ph FAST!
likes
Complain
Similar Grow Questions
Solved
FatalFarmer
Brown spots on one seedlingI noticed some small brown spots forming on one of my plants leaves, not sure what it is, maybe early sign of cal deficiency? The other plant looks nearly identical with out these spots, any advice helps although it could be too soon to tell what it is...Week 2
Leaves. Color - Dark-brown
4 years ago
3
3
Solved
Dillsnills
Some of the leaves on this one plant have brownish rusty spots on em jus looking for some jelpmplzzWondering what deficiency or nute burn or what is going on with this plants, a few of the leaves have minor tips that look brown and have brown kinda rusty spots on em, advice input opinions greatly appreciated. Orange Sherbert Auto, 3rd wk flowering,ph6.5, nute last feeding.Leaves. Curl down
Leaves. Color - Dark-brown
Setup. Strain - Autoflowering
4 years ago
3
3
Solved
Dillsnills
Leaf septoria or jus a deficiency? I removed the affected leaves.I jus removed these as a precaution, leaf septoria is what I was told this is in week 3-4 flowering ik it def will be stunted now I wiped my tent down w a wash cloth and hydrogen peroxide I did not want to use bleach, what should I do next?Keep an eye on it and hope for the best?Leaves. Color - Dark-brown
Leaves. Other
Setup. Strain - Autoflowering
4 years ago
3
3
Solved
CRIM_mir
Day 46 NL Auto: Multiple Leaf Problems Developing after Possible Nute Lock and 2x Flushing — Should I feed again @ lower TDS? What’s wrong?Hi growmies!
Wks 3-5: overfed 3 plants
Wk 6: TDS after plain h20 1800-2300ppm; 2 flushes w/ gallon h20/plant
Wk 7: TDS readings 500-800pp, but 1 plant showing multiple types of leaf problems
I thought I fixed it, but now I don’t know what’s up or what to do? Thoughts?Leaves. Color - Yellow
Leaves. Color - Dark-brown
Leaves. Color - Mottling
4 years ago
5
3
Solved
Growjardin
Curling leaves and browny patchesLeaves curling down after 3 hours of light on so far, in coco soil, airpots, been watering once a day feeding once a week. Brown patches too, thinking up the feed or over water as was sitting in water in the pot saucersLeaves. Curl up
Leaves. Color - Yellow
Leaves. Color - Dark-brown
4 years ago
2
Solved
Dillsnills
Can someone plzz help with what is going on?Can someone plzz help me w what's going on, not sure if it has to do with nute deficiency,nute burn, ph or what it's only w 2 of my plants a lemon autoseedmans Orange Sherbert Auto fast buds, should I trim the leaves that r affected or in general what can I do. Ph 6.5 wk6flowerinLeaves. Color - Yellow
Leaves. Color - Dark-brown
Feeding. Deficiences
4 years ago
1
2
Solved
KCduzit
Brown spots on bud site leaves?!halfway through flower and now in week 6 flower one of my plants is showing some large brown spots on only the upper leaves. I’m not sure if it’s a light or ph issue as the light is close. I stopped cal mag and some nitrogen this week but spots were showing up before.4 years ago
2
2
Solved
ekipekip
Taches sur les feuillesPetit probleme avec mes plants des taches marrons apparaisse et j'ai l'impression qu'ils ne poussent plus beaucoup des idées?Week 4
Leaves. Color - Dark-brown
4 years ago
4
4
Solved
WeedBerry
LeavesHi leaves are going to 2 shades of green any help?Leaves. Color - Dark-brown
4 years ago
1
1
Solved
Royalgorillaxx
Whats wrong???What's wrong???Leaves. Curl up
Leaves. Color - Dark-brown
Plant. Other
4 years ago
3
Solved
JoeyJoeGrowJoe
leaves turning brown in middle. I dont know why, if anyone could help me outWeek 3
Leaves. Color - Dark-brown
4 years ago
1
3
Solved
CroqueMonsieur
Brown spots on leaves. Can this be because of too high pH of the water (7.5)?Brown spots on leaves. Can this be because of too high pH of the water (7.5)?Week 2
Leaves. Color - Dark-brown
4 years ago
5
2
Solved
Aonjacktallbeck
Ph problem?Is this a ph problem or something else? My meter doesn’t seem to be accurate. I’ve been feeding top crop veg once a week and ph 6.3 (soil), my run off was a bit high, a gave just plain water (ph 7) but no help. Photos from two plants. HeeelpLeaves. Color - Yellow
Leaves. Color - Dark-brown
Feeding. Deficiences
4 years ago
1
1
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.4 years ago
1
1
Solved
Alpaca
brown spots sugar leavesI've asked this before, but the issue still seems to be there though it's very minor. Some of my more developed buds sugar leaves are showing brown markings. Last watering I flushed her but the markings seem to be spreading still, although very slowly. What am I dealing with?Week 11
Leaves. Color - Dark-brown
4 years ago
2
1
Solved
HYDROBEAT
Bruciatura da luce o fertilizzante ? (Dwc)HELP! Vorrei risolvere e trovare una spiegazione valida per queste foglie che stanno bruciando, principalmente sulla cola principale quindi quella più esposta alla luce". Ho anche aggiunto una dose di nutrienti essendo l'ultima settimana di bloom.Qualcuno ha qualche idea💡?Grazie4 years ago
4
6