The Grow Awards 2026 🏆
Start My Diary
Start My Diary
Login
Start My Diary
Home
Diaries
Strains
Shorts
Questions
Contests
Growers
Seeds
Breeders
Nutrients
Equipment
Blog
Login
Sign Up
Following
Follow
Brands
&
Growers
to get updates
Back to Grow Questions
Brown spots
Kobe2400
started grow question 5y ago
My plants starting to have brown spots. It’s spreading pretty quick.
Open
Leaves. Color - Dark-brown
likes
Answer
MrBlocc420
answered grow question 5y ago
I will need more information or a picture will help . Brown spots sounds like calcium deficiency. I can be more helpful with more information good luck to you
likes
Complain
Similar Grow Questions
Solved
blasterw32
Brown spots new leaves - flowering
Brown spots on the canopy and leaves are less greener. I suspect it is Calcium deficiency caused by a acid Ph (my Ph meter was not calibrated). I have flushed it and fed it normally 5 days after the first signals. Is it really Calcium def or another thing I'm missing?
Week 12
Leaves. Color - Dark-brown
6y ago
1
2
Solved
Isadore420
Deficiency
Can anyone tell me what’s wrong with this leaf/plant? Witch is Purple Lemonade #3, my best Plant 😰
Week 6
Leaves. Color - Yellow
Leaves. Color - Dark-brown
5y ago
1
1
Solved
tangie
Dark purple areas on leaves — genes or environment/feeding problem?
What the heck is this? Is it just purple genes or a stress/deficiency or a combination of multiple factors? I have checked three visual cannabis plant health guides, and did not find a single issue which looks like this. Maybe a combination of 2 factors, but I'm not convinced 😐
Week 9
Leaves. Color - Dark-purple
Leaves. Color - Dark-brown
1y ago
6
6
Solved
weefi
Brown parts on more and more leafes
I see more and more brown parts on the leafs of Sour Diesel (only) any idea what the issue might be? For reference see also my pictures of SD. First idea: Added 1 liter banana extract(to get Potassium) added 2 liter water and 2,5 ml CalMag.
Week 7
Leaves. Curl up
Leaves. Color - Dark-brown
1y ago
6
3
Solved
Heman17
Lower leaf brown
Does anyone know what this leaf browning on lower leaves is? Thanks
Week 2
Leaves. Color - Dark-brown
4y ago
1
2
Solved
CrankledLarkus
Leaf damage/discolouration
The Skunk has been getting a lot of leaf issues. I have been trying to stay on top of picking them off as they appear in case it's rust or similar and can spread. It almost looks like cal mag deficiency, but I'm feeding cal mag each feed. This is the only one effected out of four
Week 12
Leaves. Color - Yellow
Leaves. Color - Dark-brown
6y ago
2
2
Solved
MediciGrade
Brown spots and yellowing pictured above. My best guess is a Cal/Mag deficiency. Was feeding Botanicare Cal-Mag Plus at 1 ml/l up until ~2 weeks ago (friend has been watering while I was out of town). Before I feed her, any advice on what the problem is and how to correct it?
Week 14
Leaves. Color - Yellow
Leaves. Color - Dark-brown
6y ago
2
Solved
IQuSX
Коричневый ствол и красные пятна Strain: NoName
Обнаружил очень странный ствол у растения, что с ним? Был пересажен 5 недель назад из земли в кокос+перлит, при этом было удалено 80-90% предыдущей земли.
Leaves. Too few
Leaves. Color - Red or pink
Leaves. Color - Dark-brown
2y ago
1
Solved
idkman1337
plant leaves color change and dots
plant leaves turning brown and getting lots of small dots my guess so far was potassium and phosporus deficiency but after feeding em with biobizz bio bloom last 2 weeks nothing improved but got worse and worse conditions: 70% humidity 23° C in tent contstant airflow
Leaves. Color - Dark-brown
3y ago
1
2
Solved
BobRoss
Brown spots on seedling
What are the Brown spots on my seedling? I did not put mist or water on her.
Week 1
Leaves. Color - Dark-brown
Setup. Seedling
4y ago
3
4
Solved
FrostyCloudzz
Hilfe was ist los ....
Leaves. Curl down
Leaves. Color - Dark-brown
Leaves. Color - Mottling
5y ago
2
2
Solved
TheNextGanjaMan
Pest attack. What can I use to eradicate?
3 weeks of flowering, and the pests are still here. Can I play Beauveria Bassiana? Or just neem oil? - The temperatures were very high here, exceeding 30°C, this week it will decrease. - I have other plants to harvest and I'm going to take advantage and clean the grow. Help 😥
Week 9
Leaves. Curl down
Leaves. Color - Dark-brown
Other. Bugs
2y ago
4
4
Solved
Basementgrow05
Cal mag ? Or just normal fall colors appearing ?
Noticed this one just one of my plants of of 3 they are all fed the same and watered the same what could it be ?
Week 8
Leaves. Color - Dark-brown
5y ago
6
Solved
phlstvns
brown/whitish spotting and cuts on leaves
Although she looks healthy I'm seeing some brown/whitish spotting this week and 2 little cuts on 2 leaves that I've no idea what could have caused them! Any idea or tips that could help? Thanks heaps!
Week 4
Leaves. Color - Pale
Leaves. Color - Dark-brown
6y ago
4
4
Solved
Lancelot420
Help me please
Herkese merhaba ! Şu an çiçeklenmenin 2.haftasındayım ve 1 aydır bu sorunla uğraşıyorum sorunun kaynağını bulamadım ne yapmalıyım? Yardımınız için teşekkürler :)
Leaves. Edges burnt
Leaves. Color - Dark-brown
Feeding. Deficiences
3y ago
3
6
Solved
GrowGuy97
Help
What’s wrong with my plant😬😬 first grow, end of week 2 in flower, using fox farm nutrients , and fox farm soil Also the only one I have found on any of the plants in the tent
Week 5
Leaves. Color - Dark-brown
6y ago
1
2
Solved
Att14
Brown marks in leaves.
Hello ppl these brown marks started appearing on the leaves. Plant started to flower. Growing in light mix using BioBizz nutrients. Watering roughly every 3 days always mixed with nutrients. Ph between 6.3-6.5. The other plant exactly same strain and conditions not showing.
Leaves. Color - Dark-brown
4y ago
2
1
Solved
Nightabsm
Leaves browning in multiple spots Lower leaves yellowing but have green veins.
One plants leaves are browning in multiple locations. I attempted to diagnose the problem with runoff tests. pH was 6.5 and TDS was around 900ppm, which was expected since they received nutes that day. Despite not spreading to other nearby plants, could it be leaf septoria?
Week 14
Leaves. Color - Yellow
Leaves. Color - Dark-brown
4y ago
4
4
Solved
fragmentsoftime
Hi, last weeks my plants started to show symptoms of nitrogen deficiency. last 2 times i watered with 1,5x nutrient. Now they look like that, do you have any advice about the plants? -water 6.5 ph -120x120 tent, 240w QB Nutrients: t.a pro organics grow-bloom, aleo vera spray
Leaves. Color - Dark-brown
Feeding. Deficiences
2y ago
1
Solved
Mysteriogo
Leaves problems
Can you please help me ? This little one is week 9, but seem to have a lot of trouble :( Also, I can't find the perfect watering spot. It's indoor with 18L pot, but if I'm watering more that 1L each 3 days, it's wet all the time. How can I do ? Thanks a lot
Leaves. Color - Dark-brown
4y ago
4
9