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
a black spot
baddawgLLL
started grow question 4y ago
Suddenly, a very small black spot appeared on the leaves of the plant, very, very small. help!
Solved
Leaves. Color - Black or grey
likes
Tubington9
answered grow question 4y ago
You’re fine😂 i know these things can be stressful, but let’er pull through, as tuankt said, could be fly poo, could be dirt, i wouldnt be concerned, the plant itself looks a very nice green
1 like
Complain
Selected By The Grower
Ts1Ko
answered grow question 4y ago
Check under the leaves, if there is spidermite they could be hiding there. If not, don't worry it maybe just dirt or dust 😬
1 like
Complain
Tuankt847
answered grow question 4y ago
Try taking a cloth dipped in some water and wiping it. That black spot could be caused by a fly or a leafhopper
1 like
Complain
Similar Grow Questions
Solved
MarkWatney
Black spots?
Is this a deficiency, nutrient burn, or disease, growing in MG soil, recovering from overwatering as well.
Leaves. Color - Dark-brown
Leaves. Color - Black or grey
5y ago
1
1
Solved
FiFrElOt
Demande de diagnostic
Bonjour, je suis actuellement en semaine 7, mon problème dure depuis la semaine 5 et je n'arrive pas à l'identifier... Quelqu'un à déjà eu un problème comme celui la?
Leaves. Color - Dark-brown
Leaves. Color - Black or grey
Feeding. Deficiences
5y ago
2
2
Solved
Mancha
Need some help, I'm really lost
Hi people, need some serious help here. The new leaves look like sh¡T. They are kinda yellowish and the tops are necrosed. Some spots on the leaves too! I added some silica in the last water but I don't know if was the cause. Soil pH varies between 6.5 and 7.0. Any ideas?
Week 5
Leaves. Color - Yellow
Leaves. Color - Black or grey
4y ago
7
Solved
Cauli
Leafs on top turning slightly yellow and getting black spots
Hi fellow growers, any idea on what's happening to this plants? All three pictures are different plants and it is spreading super fast. One plant in tent doesn't show any of the symptoms. I already flushed them and gave them a light nutrient solution with PH 6,2
Leaves. Color - Black or grey
1y ago
4
5
Solved
tangie
Yellow & brown spots in 2nd and 3rd week in coco-perlite nursery cup. What am I doing wrong? Fed until 20% runoff (extra), strained. Smth with roots?
2nd grow in 70/30 coco-perlite mix* & very similar issues w. yellow/brown spots in weeks 2-3, then stabilizes. *CalMag & pH buffered 6h @ 0.5mS, pH5.8, strained** & seed planted. Feed: W1: **Strained sol. + water 70/30, pH5.8 W2: AN M+G+B 1-1-1 + Simplex CalMag Plus 0.4mS Help
Week 2
Leaves. Edges burnt
Leaves. Color - Dark-brown
Leaves. Color - Black or grey
1y ago
9
5
Solved
Pseudofejk
What kind of Bug?
Hello, i have these grey/silver spots on a leaves. I also discovery 2mm long and thin white bugs without wings mostly on top of leaves. But i can not determine what kind of Bug it is. Any ideas?
Leaves. Color - Black or grey
5y ago
3
3
Solved
Oggigz
Should i care ? I m going paranoid xD
Hello guys, i m on day 28 from seed i would like to have some points of view of another growers.... leaves got silvered/brown colored with snowy aspect... not on all leaves but i m pretty affraid of insect and shroom contaminations... thx for replies men and gurls
Week 3
Leaves. White powder
Leaves. Color - Dark-brown
Leaves. Color - Black or grey
5y ago
3
3
Solved
Unkraut
Seedlings (week3) lower leaves look yellow/dry
Lower leaves look bad, some are yellow, some look dry and dead...
Week 3
Leaves. Color - Yellow
Leaves. Color - Black or grey
6y ago
1
3
Solved
BudXs
Please see the 2 photos marked in the diary. Is this a classic PK burn? Did a feed with no MegaCrop, no cal-mag, just PK boost at diluted dosage. The coppering and yellowing has come sudden. Leaves are crispy where burnt. I hear its easy to burn with PK boost. Did I do that?
Week 13
Leaves. Color - Black or grey
7y ago
5
2
Solved
Dippp
Problem with plants in the 3rd week of vegetation.
I'm posting again because I accidentally marked it as resolved. I was using BioBizz CalMag from the beginning, but when I switched to Advanced Nutrients, I stopped because Ph Perfect Sensi Coco Grow A and B already contain CalMag.
Leaves. Curl up
Leaves. Curl down
Leaves. Color - Black or grey
2y ago
1
2
Solved
The_Wanderer
Tea time for health benefits?
What are the health benefits of fresh black cannabis leaves eaten, or made into a cold brew / infusion tea that is different than green leaves?
Leaves. Color - Black or grey
6mo ago
7
5
Solved
EvilGrower
Leaf discoloration - light and dark splotches
Hello! Any ideas as to why my leaves have splotches of discoloration? 😅 It appears that one leaf has light 💀 patches while the other leaf has dark. 👹 Thanks for your time! 🙌
Week 2
Leaves. Color - Yellow
Leaves. Color - Black or grey
6y ago
2
3
Solved
MEDICAT
What happened to the leaves?
What happened to the leaves? Was it caused by too much water? (Coco ph5.8)
Leaves. Color - Black or grey
5y ago
4
3
Solved
PakaloloTingz
Grey spots on leaves and yellowing
The leaves are looking light green to yelloe and there are these dark edges on the leaves are showing up.. Has anyone experienced this before? It was happening a bit before transplant but now it seems to be getting worse. I just transplanted within 24hrs... Stress? Overwatering?
Week 8
Leaves. Color - Black or grey
5y ago
1
1
Solved
Terp_Djiny
What could this be?
I have no idea what this could be! It came in one night and affected several sun sails. Pnly small black dots. The environment has not changed. Continuous temperatures and a relative humidity of 40%
Week 21
Leaves. Color - Black or grey
6y ago
2
2
Solved
growbie
What deficiency it can be?
what deficiency it can be? its start from upper fun leaves
Leaves. Color - Black or grey
6y ago
2
2
Solved
ChefDan420
Today I noticed 🍄mushrooms popping up with GiSCele. Does that matter? Are they🍄poisonous to girlies? Don’t bother me,but I dunno🤔. I recently started using 🦇 bat guano and have a feeling that’s what encouraged- kinda cool if I see Smurfette sunbathing on 👙🆒👍🏼
Week 20
Leaves. Color - Black or grey
8y ago
1
2
Solved
JoeyJoeGrowJoe
Leaves brown and crispy
Leaves brown and crispy Day HR % 55 Night HR % 65 watering them everyday, could that be the problem ???
Week 5
Leaves. Color - Black or grey
6y ago
3
Solved
watson
Heat stress?
Heat stress and can it be saved? Had to go away for a couple days. Hottest days of the summer mid 90's, full sun, but well watered. This is my first ever grow (auto & outdoor) and I expected about 1 week left until harvest. Thanks
Leaves. Color - Black or grey
4y ago
1
2
Solved
mushimushi
Deficit or excess? Or what
What happen
Leaves. Color - Black or grey
4y ago
1
5