The Grow Awards 2026 🏆

Back to Grow Questions

Brown spots on leaves

Kenderbetyarstarted grow question 5y ago

I've noticed a few brown spots on the main cola's leaves. The rest of the leaves are looking normal. What could cause that?

Kenderbetyar

Open

Leaves. Color - Dark-brown

likes

Answer

Ianc427answered grow question 5y ago

I’m going through the same thing at moment , tried to get help but no one answers me on the questions endless

likes

Complain

JesusChristanswered grow question 5y ago

Sorry it may be Calcium and or Magnesium. Supplement with CalMag 1 ml per litre of water add before base Nutrients

likes

Complain

JesusChristanswered grow question 5y ago

Calcium deficiency use calcium magnesium. Could be boron but that usually has twisted leaves and starts at the tips and is rare

likes

Complain

Similar Grow Questions

Solved

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 point

Leaves. Color - Dark-brown

5y ago

1

Solved

Continuing calmag deficiency What I think is a calmag deficiency started about 10 days ago. At first I thought it was too low PH (6.0 - 6.1), so I corrected that, but no luck. Then I started adding biobizz calmag, still no luck. It seems that the deficiencies are picking up speed again. Any ideas appreciated

Leaves. Veins - yellow between

Leaves. Color - Dark-brown

Feeding. Deficiences

5y ago

2

4

Solved

Brown Patches on Older Leaves Slight yellowing and brown mottled patches. Only on one of the two plants and they’ve been treated and fed exactly the same. On some older fan leaves, no signs of anything on new growth. Anything to worry about at this stage? Maybe just a sensitive pheno? Any advice appreciated.

Leaves. Color - Dark-brown

5y ago

3

3

Solved

Help, my leaves are weird One of my Northern is having an issue, what kind of efficiency is it ? Or what is it ?

Leaves. Color - Dark-brown

4y ago

4

2

Solved

what do you guys think this is ?Hi Guys Sorry to keep bothering you all but please see the pics the leaves are curling downwards and going this colour. temps are high at the moment but seems like an overfeed to me. Curruntly flushing with just 5.8 water for 5 days then will re introduce feed.

Leaves. Color - Dark-brown

6y ago

1

7

Solved

PH problems High Again! I still go the soil ph problems (4.7) my diary is fucked up so dont go after this weeks diary. dolomitic limestone?

Leaves. Color - Yellow

Leaves. Color - Dark-brown

5y ago

1

1

Solved

leaf !?... no real problem.. is it a stress due to excessive handling of fertilizers or the breaking of the field in stops and leaves for training?good morning guys I noticed some burnt leaves I don't understand if it was a slight lowering of the level of the dwc ..because I noticed some slightly dry upper roots then I increased the level and after the roots improved ... I don't understand if that machine is due to stress o

Leaves. Color - Dark-brown

Leaves. Other

Techniques. LST

4y ago

2

Solved

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

Mg Mn P K deficiency?Mg Mn P and K deficiency? Only happen on mid-lower leaves. How to fix this problem on my mother plant in soil substrate? Top leaves are OK. My watering is pH 6.5 and foliage spray CalMag 1ml/L a few time already and still see this happen on lower leaves. 🙏

Leaves. Color - Dark-brown

4y ago

3

4

Solved

Diagnose my plant :)Is this a Calcium deficiency? I neglected her for a few days but time to solve it now

Leaves. Color - Dark-brown

5y ago

2

Solved

Happy_Rakosnicek

Leaves. Color - Dark-brown

5y ago

1

1

Solved

Hat irgendwer Haushalttips? Kann ec und ph-wert nicht regulieren oder testen bitte um dringende Hilfe

Leaves. Curl down

Leaves. Dropping off

Leaves. Color - Dark-brown

5y ago

4

3

Solved

Deficit or surplus Hey, Can someone Help me pls? Triple G Auto Week 9 Soil everything went great until today Starting some Brown Spots on the top leaves Maybe phosphorus deficiency or calmag deficiency? Fertilizer hesi half according to scheme watered two days ago with ph 6.4 Drain was ph 6.8

Leaves. Color - Dark-brown

2y ago

2

1

Solved

What causes this What is this ? Happened over night

Leaves. Tips - Burnt

Leaves. Color - Dark-brown

3y ago

1

3

Solved

Browning leaves My leaves are showing some brown spots 5 days post transplant. I also increased my light from 30% intensity to 80% intensity. I have them 18” away currently. Am I showing signs of light burn? I have since turned the light back down to 50% and I am not on a 18/6 cycle

Leaves. Color - Dark-brown

1y ago

5

6

Solved

NarcissisticEcho

Copper color leaves Copper color leaves. Also looks kinda dead. What can it be?

Leaves. Color - Dark-brown

4y ago

1

Solved

light stress of seedling Light stress (image of 28.5.): is it likely that my plant will recover?

Leaves. Color - Dark-brown

2y ago

4

3

Solved

CheckThoseTrichs

Lower leaves drying up upper growth yellowing Lower leaves starting to dry and upper growth yellowing. DWC, pH 5.9 and 600ppm. M-G-B series nutes.

Leaves. Color - Yellow

Leaves. Color - Dark-brown

5y ago

4

3

Solved

Leaves changing colour I'm seeing a shade of brown kick in within the top 3rd of the leaves, should I be worried this far into flowering? Any help is appreciated.

Leaves. Color - Dark-brown

5y ago

2

2

Solved

Mancha en hoja A que se debe que estén así algunas hojas? Es deficiencia o exceso? Regaba con 1000 ppm pero vi algunas puntas quemadas y color verde oscuro en las hojas así que lo fui bajando poco a poco hasta llegar a 500 ppm, y hoy note esas manchas(el agua drenada da 750 ppm)(coco y perlita)

Leaves. Edges burnt

Leaves. Color - Dark-brown

6y ago

3

3