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Back to Grow Questions
Leaves have brown spots
Flyalivebeats
started grow question 4y ago
Any idea what these brown spots could be?
Solved
Leaves. Color - Dark-brown
1 like
Roberts
answered grow question 4y ago
You are experiencing progressive potassium deficiency. Light nitrogen and heavy potassium are phosphorus in flowering. Good luck🌱
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Selected By The Grower
Coopmc
answered grow question 4y ago
You should find answered hear I sugest finding a feed scheadual and follow it
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Coopmc
answered grow question 4y ago
https://www.royalqueenseeds.com/blog-cannabis-nutrient-and-deficiency-table-n88
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Coopmc
answered grow question 4y ago
https://www.botanicare.com/faqs/can-i-foliar-spray-with-cal-mag-plus/
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Coopmc
answered grow question 4y ago
https://growace.com/blogs/learning-center/how-to-fix-nutrient-lockout
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Flyalivebeats
answered grow question 4y ago
So what should I do?
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Similar Grow Questions
Solved
R2d2420
Discoloration in a few leaves
Got a few leaves with a bit of discoloration. Id say a lighter shade of green going on brown. Hope the pic helps. Should I be worried?
Leaves. Color - Dark-brown
5y ago
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Dawel
Puntas y bordes amarillos/marrones ¿Carencia de Potasio?
Mi planta comenzó a florar aproximadamente hace 2 semanas y note que las puntas de las hojas se ponen amarillas, las hojas mas viejas se han puesto algo palidas y las puntas pasan de amarillo a marrón. También hay manchas marrones en hojas de mediana edad. ¿Carencia de K?
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Leaves. Color - Dark-brown
4y ago
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FatalFarmer
Brown spots on one seedling
I 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
6y ago
3
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Solved
ekkoz897
Light burn, light burn due to humidifier water lights?
What do you think caused this brown color on that leaf? I have 5 leaves like that, all the others are ok. I believe it's due to pulverizing water and droplets acting as magnifiers for the light, causing small burns. Also, since they are burnt, should I just cut them out?
Week 7
Leaves. Color - Dark-brown
3y ago
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Solved
Dragosani666
Top leaves turn dark and curl - What can I do?
I've had Nitrogen and possible Cal/Mag deficiencies 2 weeks ago. Mid last week I started noticing some burn a the tips, so i dialed nutrients back again. By this weekend the tips of the leaves curled further and turned dark. The rest still looks a bit pale, but buds look good.
Week 7
Leaves. Curl up
Leaves. Color - Pale
Leaves. Color - Dark-brown
2y ago
4
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Solved
Skylife
Brown dots on leafs
Just checked on my girls, and noticed this slight brown mark on 2 leafs... what is this?
Leaves. Color - Dark-brown
Other. General questions
6y ago
4
Solved
TweetNL
Some brown spots showing on the top sugar leaves. I suspect it is due to the cooling fan of the light blowing down hot air? I've adjusted the fans to blow air directly over the top of the main cola's and I increased the light distance.
Week 9
Leaves. Color - Dark-brown
7y ago
1
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Solved
Cawabunga
Brown spots on lowest leaves
Hallo Freunde! Ich habe an den untersten Blättern meiner Pflanzen, Verfärbungen auf der Blattoberseite entdeckt. 😲 Ich vermute das etwas Überdüngung die Ursache ist. Week 3 Day 19 Wenn jemand die genaue Ursache und wie ich es behebe, erklären könnte? Vielen Dank 😗 Cawabunga 💤
Week 3
Leaves. Color - Dark-brown
3y ago
3
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Solved
Rams3s
What happen?
Can somone tell me what happen to my love?? much/less light? Carence ? Excess? Im at the end of the strench (3th week of bloom)
Leaves. Edges burnt
Leaves. Curl up
Leaves. Color - Dark-brown
3y ago
1
5
Solved
Grazynka
Flush or what to do ?
Advice please. I watered yesterday but the stains on the leaves are getting worse. Now I don't know if it is deficiency of cal n mag due to nutritient lock out which might be due to ph being off as I have 5 reders and all of them show a different thing. 🤦♀️...or it is it rust?
Week 7
Leaves. Tips - Burnt
Leaves. Color - Yellow
Leaves. Color - Dark-brown
4y ago
1
1
Solved
MomnPoppaSeed
How can 1 add pictures?? My plant is showing rust colored spots in between veins on older leaves. Her run off and water PH are always similar at 6.2 in her cocoa core/pete/perlite/casting medium. I just gave her a small taste of Epsom salts but need to fix b4 it gets worse
Week 6
Leaves. Color - Dark-brown
7y ago
3
5
Solved
Smokin_Joe
Guess on what this is?
Unsure what this issue might be. PH seems in check going in and out. Getting mainly Fox Farms nutrients - got very weak doses of B-52 and CalMag a week or two ago. The other two plants are fine.
Week 6
Leaves. Edges burnt
Leaves. Curl up
Leaves. Color - Dark-brown
5y ago
2
3
Solved
Chief_Leaf
Why are the leaves tips curling dying and brown marks appearing?
My Mac #1 showing brown spots/marks on leaves, with tips curling and dying yellow/brown - what is the problem? How do I fix this? She is in week 5 flower. Is it calcium deficiency? pH problem?
Leaves. Tips - Burnt
Leaves. Tips - Die
Leaves. Color - Dark-brown
2y ago
2
1
Solved
Eddjack
Deficiency?
I need help recognizing a deficiency. i think it is cal mag, but it seems strange it has quite heavy nutrition. the pH of the earth is 6.20. i'm at 7 weeks and it also seems a bit slow in flowering. what can i do?
Week 11
Leaves. Color - Dark-brown
Leaves. Color - Mottling
5y ago
4
4
Solved
Kratistos
2 Autos week 8 flo 2
The leaves on the upper plant wake up today with a brownish spot. It’s not light burning for sure (ts 1000 dimmer 70% height 50-60cm). Feeding problems? The first two photos are dark brown, the last one is yellowish.
Leaves. Color - Dark-brown
2y ago
2
Solved
EvilBuds
Leaves turned brown ! Please help
Hello, Got a problem with this plant, it's 15 days old and there's brown on it's leaves... It does not grow as fast as the others. What could be the problem ? Platinium Royal Mix - Biobizz root-juice 2mL/L + Humic Fulvic Acid 3mL/L spray + Biobizz bio-grow 1mL/L 27°C / 50% H
Leaves. Color - Dark-brown
4y ago
1
1
Solved
growbert76
Is this really a potassium defiency? Any suggestions how to deal with it?
Hey Guys, need your help please. It's FD 28 and the leaves of my three White Widows show some signs of a nutrient deficiency (at least my assumption).I'm growing in living soil w/o any additional fertilizer and watering with a 7:3 mix of osmose/tap water and 0,5 ml/l CalMag.
Week 8
Leaves. Color - Dark-brown
Leaves. Color - Mottling
Feeding. Deficiences
3y ago
4
4
Solved
LKABudMan
Why is my WW seedling browning?
I have a White Widow seedling that is showing brown spots. I am not sure if the LED light was too close, or if it is showing nutrient deficiencies/excesses. pH=5.8, PPM=160 (80ppm in well water).
Week 1
Leaves. Color - Dark-brown
5y ago
2
Solved
Rogar13
I wanted to ask if you think this plant has mold or if it's just a major deficiency due to a blockage. I have an indoor plant next door with some plants growing with dark spots, it's in my previous question. Sorry for giving more information, I don't know what would help.
Leaves. Color - Dark-brown
Other. General questions
1y ago
1
Solved
AtticGrowing
I flushed it because some leaves were showing some Nitrogen Toxicity. Run off was coming at 3000ppm and I fixed it to 1500. Now the older fan leaves are yellowing with some brown spots (check the last picture). It's a deficiency? Should I increase nutes? Thank you very much!
Week 8
Leaves. Color - Dark-brown
7y ago
6
6