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
Brown spots on leaves
Kenderbetyar
started 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?
Open
Leaves. Color - Dark-brown
likes
Answer
Ianc427
answered 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
JesusChrist
answered 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
JesusChrist
answered 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
RallyAutos
What deficiency is this?
This green gelato autos fan leaves are starting to turn brown and curl upwards. Is this a nute deficiency or what’s going on? Thanks!
Leaves. Curl up
Leaves. Color - Dark-brown
Leaves. Other
5y ago
1
8
Solved
HecticJardin
Brown patches on leaves
Noticed these marks on the leaves of the plant I've had problems with. Any ideas what they could be? The other two are smelly amazing and the single plant is so sticky! I think it might be the cheesecake but I'm really not sure, I won't make the mistake of mixing them up again
Week 7
Leaves. Color - Dark-brown
6y ago
2
Solved
Alfasirius
Leaves color
Hi everyone! I want to know why the leaves look. Ph 5.8, 50 humidity, 23 celcius. I feed every 2 days at 1.2 ec. Someone knows?
Leaves. Color - Yellow
Leaves. Color - Dark-brown
6y ago
1
1
Solved
GrowerNL
My runtz are drooling since the beginning i am growing on coco watering once every 4-5 days on this picture i haven’t given water for 3-4-5 days I have a repost its a update My runoff is 7800 EC pH 5,66 but i gave it 1200 my last watering i am gonna flush
Leaves. Curl down
Leaves. Twisted
Leaves. Color - Dark-brown
6y ago
2
2
Solved
Mekster
Week 5 Flower Brown Leaves
I’ve been dealing with this discoloration since veg. Does she need cal mag? Is this ph float I’m not catching?
Week 11
Leaves. Color - Yellow
Leaves. Color - Dark-brown
2y ago
6
Solved
HornyMccoy
Baffling brown spots
Brown Spots on leaves. Any idea what this means? It appears to necrotic towards the tip of the leaf. Any ideas?
Leaves. Wilting
Leaves. Color - Dark-brown
3y ago
4
5
Solved
Reefaboi
Still
Can somebody help me, kind of weird the rust still spreading on that plant but not on other, I was wondering if it's not simply a defo
Week 7
Leaves. Color - Dark-brown
6y ago
1
2
Solved
HAPPY91
Leaf Help Please
Whats with the discolor and clawing?
Leaves. Curl down
Leaves. Color - Dark-brown
5y ago
7
5
Solved
bypado_farm
deficiencies? mag/cal, N, P?
All the leaves from bottom to top are turning yellow... some of them have brown spots. mid-late stage def? Magnesium/calcium deficiency, nitrogen, manganese and phosphorus deficiency? Flushed all of them 1-2 weeks ago because of ph fluctuations Opinions?
Leaves. Color - Yellow
Leaves. Color - Dark-brown
5y ago
6
6
Solved
JABS420
Burnt and drying leaves
Any idea what I might have done wrong on the sick mothman maybe nutrient lock or overwatered? It was the only plant without drainage hole and stayed pretty soaked as I was out of town for 3 days. Any advice is appreciated!
Week 2
Leaves. Edges burnt
Leaves. Curl down
Leaves. Color - Dark-brown
4y ago
3
3
Solved
surhaze
AYUDA! Hojas con puntos negros/marrones
Algunas hojas de mis plantas comenzaron a presentar estas manchas, son como puntos marrones / negros y no se que puede ser :( Hongos, carencias por ph incorrecto? ayuda!!
Leaves. Color - Dark-brown
6y ago
3
3
Solved
mochi_mcfly
is my sprout healthy?
is my sprout ok? is this coloring normal? growing in happy frog. 48 hours since i planted
Leaves. Color - Dark-brown
4mo ago
1
1
Solved
Oldmanbud__50
Help on cal diffcency
Hi can I use blood fish n bone to sort a calcium problem. In my plant.. Only on 1 fan leaf.. Doing this on a very low budget. Ty in advance
Week 2
Leaves. Color - Dark-brown
6y ago
1
1
Solved
seeddevil
Is this a disease caused by a lack of calcium and magnesium?
I pruned these problematic leaves during the flowering period, wondering whether this would lead to a decrease in yield. Calcium and magnesium were added every time I applied fertilizer. What caused the disease? Overnutrition burn?
Leaves. Color - Dark-brown
6y ago
1
1
Solved
munchiesart
Do you think this is a toxic condition, a Ph deficiency or a sign of deficiency?
My G13 showed signs of illness after my last watering. Day 105. I added İn my last irrigation 12ml Micro-6ml Grow-18ml Bloom-6ml Molasses-1.5ml Bloombastic-2ml B52 to 4 l. of water. I've kept the pH in the 6-6.5.(PPM1500) Please help me save this girl at once :( Thank you.
Leaves. Edges burnt
Leaves. Curl down
Leaves. Color - Dark-brown
5y ago
3
5
Solved
Flamingo21
Leaves dying...
(Not from my diary, asking for a friend, thank you) Hi guys, need some help please. What can cause this problem on the leaves? I'm using foxfarm soil (ocean forest) Ph range 6.5-6.7 Cal mag 4 ml /gallon
Week 6
Leaves. Color - Dark-brown
5y ago
2
2
Solved
Splifflicious
Brown spots on bud sites leaves
Hi all, I’ve been getting these brown spots in the past 2 weeks, mainly on the top leaves located nead bud sites. What could this be? Ph is ok, I’ve already tried to flush her, Rh is around 45%. This is day 65, ~20 more to go. Will this affect the bud formation or quality? Ty 🙏✌️
Leaves. Color - Dark-brown
Leaves. Other
6y ago
3
3
Solved
M4RKY
Hi guys my special queen has got brown leaves and they look like they're getting worse. It pretty close to harvest so I don't want it to die at this stage. It's my first grow so any tips or advice is appreciated. Thanks
Leaves. Color - Dark-brown
6y ago
1
Solved
SanRais28
Day 2 - 02.02.2019
Week 2
Leaves. Color - Dark-brown
7y ago
2
Solved
IQuSX
Refresh Box-area
How to quickly put things in order in this box? There's also a tank...
Leaves. Color - Dark-brown
Other. Bugs
Techniques. ScrOG
3y ago
4
3