The Grow Awards 2026 🏆

Back to Grow Questions

Have brown spots on leaves and get it to stop!

BeeZBudZstarted grow question 4y ago

I can not figure out what this is I have tried treating for calcium deficiency however I can’t seem to shake it.

BeeZBudZ

BeeZBudZ

Solved

Leaves. Color - Dark-brown

likes

KushGANGanswered grow question 4y ago

Hello it seems you have calmag deficience. How do you try to correct it. You can use epsom salt which is the best for this. You can mix it in water and mist your plant for a quicker effect. Good luck. Bye

likes

Complain

Selected By The Grower

Chow_13answered grow question 4y ago

could be excess P and K. they can lockout calcium. hard to tell without any details

likes

Complain

Similar Grow Questions

Solved

Calcium deficiency, cal-mag now in hand, water now, or wait for normal scheduled water? Last water yesterday.Plants are suffering from an early stage of calcium deficiency, received a bottle of cal-mag today. Watered last night cause I didn't want to wait any longer. Should I wait for my next water (2 more days) or give a single dose of Cal-mag now, to get some calcium to the plant?

Leaves. Color - Dark-brown

Feeding. Deficiences

5y ago

4

3

Solved

Is this Phosphorus deficiency ?is this Phosphorus deficiency ? these symptoms started maybe 2 to 3 weeks after switching over to the Biobizz line .. what you guys think? so now i started to add Biocanna's Bloom and Boost like i used in my prev 2 grows but it seems to continue .. what you guys think?

Leaves. Color - Dark-brown

6y ago

4

3

Solved

Ugly leaves So, guys.. I asked a question here, like 3 days ago, about some leaves. I think I have found out what has happened. Mold ignition, but very few, at the root. Have already medicated. Do you think this is a mold symtomn? Cheers!

Leaves. Color - Dark-brown

5y ago

1

1

Solved

Brown rusty spots Hi guys ! I got somes wierds spots like rust brown ish on the 2nd week of veg in autoflower. I didnt feed them a lot before ( like 1/8 of the reciepe ). Its only on the 2 bottom leaves. 26 degre 60-65% humidity purple lemonade auto fastbud

Leaves. Color - Dark-brown

5y ago

1

4

Solved

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?

Leaves. Color - Dark-brown

3y ago

4

6

Solved

Brown tips, Crusty leaf.These brown tips appeared on the leaf and it cracked, anyone know what it is?

Leaves. Color - Dark-brown

5y ago

1

Solved

Damaged leaves I have a problem with one of the plants, the leaves are damaged and some of them had to be removed, the plant is growing too slow. I thought it is related to Cal/Mag but I've been adding it for a while since week 2 and the problem is not corrected

Leaves. Color - Dark-brown

5y ago

1

3

Solved

TheProfessorGrows

PH Nute Lock!!Having some serious PH and nute lock issues. Watered with nutes for first time last week. Started showing cal/mag deficiency. Tested runoff on last water and was at 5.5 with 6.5 in. Flushed with 7.0 water and runoff still 5.5. Plant seems to be getting worse!

Leaves. Color - Dark-brown

3y ago

1

1

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. Heeelp

Leaves. Color - Yellow

Leaves. Color - Dark-brown

Feeding. Deficiences

5y ago

1

1

Solved

Need experienced organic grower help!Growing in coco with organic dry amendments and worm castings. Had to give calmag 2 times at a low dose. Water PH 6.1-6.4 carbon filtered every time. Just flipped to flower yesterday. Weird spots on leaves. Phosphorus or calcium issue? Plant is growing vigorously just a few spots

Leaves. Color - Dark-brown

4y ago

2

Solved

Chocolope Tent (Nutrient Lockout?)My choclope photoperiod plant gets brown spots while her sister receives too little nutrition. I think it's a nutrient lockout. (2/3 weeks left from harvest) Ladies get Plagron COCO A+B and Green Senations. I don't see any mold, air circulation is good.

Leaves. Color - Dark-brown

3y ago

6

Solved

Leaf issues Looking at the leaves, what you think is the issue with this plant? every single morning i have couple of totally yellow leaves at the bottom, edges are getting dark green and then dry. I flushed the plant but didnt see any improvement. I have 2 more plants that are doing great.

Leaves. Curl down

Leaves. Color - Dark-brown

6y ago

2

2

Solved

Why are some leaves forming small brown dots?What are these leaves doing? It seems to only be these 2/3 and I wonder why they form these brown spots.

Leaves. Color - Dark-brown

1y ago

1

2

Solved

What is this brown intrusion upon my plant? And how do I obliterate it?Another question?! Anyway, what the hell is this browning? I think it's light burn. But why is it lower too? PH? Magnesium? Nitrogen toxicity? Par: 1300 PPFD Fox Farm tiger bloom 7 ml/gal. Fish Shit 3 ml/gal. See diary for environmental conditions. Thanks for the help. Again.

Leaves. Color - Dark-brown

3y ago

3

12

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.

Leaves. Color - Dark-brown

1y ago

4

3

Solved

Is this anything to worry about?Day 23. Noticed a few tips turning brown but plants look green and healthy, is this anything to worry about and will it effect my yield?

Leaves. Color - Dark-brown

5y ago

1

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

Leaves brown down the length of half the leaf I have some leaves that have gone a bit brown down one half, but along the length. See them in Day 40 pics (I have added a extra comment there). Does anyone know what that is? I was thinking maybe it is just the bits that have been sitting under other leaves, but I am not so sure

Leaves. Wilting

Leaves. Color - Dark-brown

6y ago

2

3

Solved

Foglie Ho un problema alle foglie sapete cosa sia? Ho provato ad alzare i led a 50cm per vedere se sia quello il problema. Voi cosa dite?

Leaves. Edges burnt

Leaves. Color - Dark-brown

5y ago

2

3

Solved

Anybody know why I’m seeing brown spots and burnt tips? I think it might just be time for a res change. Haven’t done it since I flipped and she’s been drinking about 1.5 gallons a day for the last 2 weeks.

Leaves. Color - Dark-brown

8y ago

1

4