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
Have brown spots on leaves and get it to stop!
BeeZBudZ
started grow question 5y ago
I can not figure out what this is I have tried treating for calcium deficiency however I can’t seem to shake it.
Solved
Leaves. Color - Dark-brown
likes
KushGANG
answered grow question 5y 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_13
answered grow question 5y ago
could be excess P and K. they can lockout calcium. hard to tell without any details
likes
Complain
Similar Grow Questions
Solved
Asuratyr
Nutrient deficiency? If yes, what's the best course of action to salvage the situation?
First time grower of 3 autos, at week 8, lower leaves started turning yellow, top leaves started to get smaller/develop brown spots 2 weeks ago. Is this a nutrient deficiency problem? Soil should have been fertilized for 3 months, but I'm thinking they burned through it.
Leaves. Color - Pale
Leaves. Color - Dark-brown
Feeding. Deficiences
5y ago
2
2
Solved
dillande3
Looks like the leaves are rusting, Bronze colours comming from the middle and get a more rusty look and then dying
Hello it looks like the leaves are rusting, Bronze colours comming from the middle and get a more rusty look and then dying eventually Pls let me know what need to be done, I am using Organic Living soil method and water only way, Its now Day 35 Flower Phase, PGK, in 5-gallon TC
Week 4
Leaves. Too few
Leaves. Dropping off
Leaves. Color - Dark-brown
3y ago
3
Solved
zaMaurice
Moin, bei meiner Größen Pflanze fangen die Blätter an von außen gelb zu werden und braune Punkte zu bekommen. Ist das ein Zeichen von einer überdüngerung? Alle anderen Pflanzen haben dies nicht. Oder zu wenig?
Leaves. Color - Yellow
Leaves. Color - Dark-brown
2y ago
2
2
Solved
Greeneyedgrower
Color change.
I always get nervous when the leaves start to change. So my question is, this is natural right? I would guess they are a couple weeks away from finishing?
Week 8
Leaves. Color - Dark-brown
6y ago
3
4
Solved
Luna91
Leaf tips are browning
Ciao tutti, What is going on with these leaf tips? It’s the third day of their Flush & It can’t be NutBurn, or the color of tips doesnt look like NutDef! Is the light stress? If this de-coloring continues, will it effect the buds & final yield? Thanks
Week 12
Leaves. Color - Dark-brown
6y ago
2
Solved
Sanabassan
Problem
New Problem . How Can i fix this?
Leaves. Color - Dark-brown
2y ago
3
3
Solved
Hesperik123
Brown spots. Any idea guys ?
Something wrong is going on with my first grow. My last watering ( with ph 6.4 ) guanokalong grow 0,5ml/l ..... bloom guanokalong bloom 0,5ml/l .... piranha Advanced Nutrients Piranha 1ml/l .... Guanokalong BatBoost 2.7ml/l ... Sensi Cal-Mag Xtra 0.5 ml/l. Flowering week 3.
Leaves. Edges burnt
Leaves. Color - Dark-brown
Techniques. ScrOG
6y ago
1
2
Solved
chapadux420
Dark spots on leaves
Hey guys, some leaves have these black spots, what do you I'm facing here? Thanks
Week 10
Leaves. Color - Dark-brown
Leaves. Other
6y ago
1
Solved
JoseTodoLoco
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
Week 5
Leaves. Color - Dark-brown
6y ago
1
3
Solved
Ganga_Grower
Yellow/brown splodges
Hi there My plant is still young @ just over 2 weeks now. She has these brown/yellow splodges on only one leaflet but the new growth is looking a healthy green, so im not too concerned at this point. I am curious as to what it is though. What would you guys suggest it to be?
Leaves. Color - Yellow
Leaves. Color - Dark-brown
6y ago
3
2
Solved
Shivashamboom1
Macchie di ruggine
Ecco adesso si vedono le foto. Growers ho trovato delle macchie di ruggine su 2 foglie della Apple strudel.da cosa dipende??
Leaves. Color - Dark-brown
2y ago
2
Solved
Darkmanx
I have this crazy brown death happening to my leaves. Not exactly sure what's going on. PH is 5.5-6.5 and I watered down the nutes.
Week 5
Leaves. Color - Dark-brown
8y ago
13
6
Solved
N1xon
Why do I have brown/black spots on my OG leaves?
Bare with me please. I purchased "aPotforaPot" kind of on a whim late one night. I planted 3 weeks ago yesterday and have been feeding exclusively water with PH ~5.5. Just received Cal-Mag in the mail and plan to use on the next watering. I'm starting to notice spots on OG leaves
Leaves. Color - Dark-brown
6y ago
1
2
Solved
Jake13255
Possible manganese deficiency?
I fixed some previous issues and have not been feeding my plants. They are in peat and worm castings and pearlite. About 6.6ph soil, watering with 6.5-6.6 water. I am going to water with nutrients again to see if that helps just want to hear another opinion.
Week 5
Leaves. Color - Dark-brown
5y ago
2
2
Solved
BudsRus
Brown spots
Had issues with this plant since day 9- it collapsed so have added support It's now around 2 weeks old and is developing a brownish colour with some clear spots Please see pictures for a better description
Leaves. Color - Dark-brown
5y ago
3
3
Solved
TechDCo
1. Over Fed (seaweed?) 2. Burnt? Cauliflower.. 3. Calcium Deficiency 4. Hydrogen peroxide 12% Food-grade 30/70 Mix. Personally I think it's the hydrogen peroxide 12% mix, the hydrogen gave one of its atoms to the neuron of the Diatomaceous earth metal clay. With help from heat
Week 9
Leaves. Tips - Burnt
Leaves. Curl up
Leaves. Color - Dark-brown
2y ago
8
7
Solved
dalilama
Why are my leaves getting brown yellow?
My leaves are getting brown/yellow, I saw online that it's a bad sign but I don't understand if it's under watering, overfeeding, underfeeding, light burn ecc? Thank you so much for the help first time grower.
Leaves. Edges burnt
Leaves. Color - Dark-brown
6y ago
2
2
Solved
IceeTea31
Help
What is the issue? do they need calmag or should i flush them? if i should flush them what ph should this water have?
Leaves. Tips - Burnt
Leaves. Color - Yellow
Leaves. Color - Dark-brown
2y ago
5
5
Solved
CaaosPLAGRON
Help help help
What's the problem with the plant .... ????? How to solve ..... ????? Garzie 😉
Week 10
Leaves. Color - Dark-brown
6y ago
1
1
Solved
Ikamulus
what is that?
these brown parts are mainly at the upper buds and the bud which are affected smell a little rotten. I checked for insects but there are none. Temperature is also normal as well as humidity. It only affects 1 of 4 plants.
Leaves. Color - Dark-brown
4y ago
1
1