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
kelsiehoward95
First grow issues
Anyone know if this plant is gonna make it or what’s going on? Three different plants, First grow, all seeds are going good but these. Pictures are kinda hard to see. First two pictures are one plant. 3rd picture is 2nd plant. 4th picture is the 3rd plant.
Leaves. Color - Black or grey
4y ago
5
Solved
Frnikola
What to do? → BF Runtz Auto - Day 42 - RH70, 80F in BioBizz Light Soil
On my last post, I was advised I have N tox, so I watered w/o BioGrow, just BioBloom and it's gotten much worse. The runoff EC was 1.5 (watered with 0.8, runoff pH was okay), so I’m guessing it's salt buildup. I plan to flush when this watering dries out—any thoughts?
Buds. Not fattening
Leaves. Color - Yellow
Leaves. Color - Black or grey
2y ago
1
Solved
Cookie_monster12
What is this caused by? Spreading through mid leaves quite fast
Week 8
Leaves. Color - Black or grey
5y ago
4
4
Solved
The_Wanderer
🌌👽 Harvest Alien Sparkle on auspicious day... or wait? 👽🌌
Harvest on the Winter Solstice? Or wait? What would you do? Wife says harvest. I say wait. What do you say?
Buds. Other
Leaves. Color - Black or grey
7mo ago
3
5
Solved
Smokeyboar
If a plant has cal and mag and phosphorus def how do you correct these
If a plant has cal and mag and phosphorus def how do you correct these
Leaves. Color - Black or grey
6y ago
1
3
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
einamio
Weed doctors to the rescue
Day 44, fb auto, my happy girl developed those dark spots at the top... Is this a Calmag deficiency? Although I'm giving her calmag every feeding. I think there are also first burnt tips. I'm about to water her tonight, what should or should not give her? Thanks for your inputs🙏
Week 5
Leaves. Tips - Burnt
Leaves. Color - Dark-brown
Leaves. Color - Black or grey
2y ago
3
5
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
stefu
Hallo, werden die Blätter der Pflanzen dunkler wenn man mehr Dünger gibt bevor dass sie überdüngung Erscheinungen haben? Ich nutze Canna aqua. Ich weiß dass wenn ich zu viel Stickstoff gebe dass die Pflanzen dunkler werden. Ist das aber auch so bei zu hohen EC?
Leaves. Color - Black or grey
5y ago
1
2
Solved
Nocturnalgardener
Calcium Deff
im just wondering if you think this is a calcium deff?
Week 9
Leaves. Tips - Burnt
Leaves. Color - Black or grey
5y ago
2
1
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
Cookiemonster297
Black dots - second opinion needed
Im growing an Gorilla-Cookies Auto, Indoor, 50w led, DWC with Plagron A+B and Power buds (Power roots at veg) water gets renewed once a week and my Ladie ist now 8 1/2 weeks old and Starts to develop black dots in the leave's Center. Looks Like a Problem with Magnesium to me,
Leaves. Color - Black or grey
2y ago
2
3
Solved
NicoKh
bad leaves
Some leaves in a bad looking don't know why, i think is overfeed or smthn what do you think? them are on the middle of the 5th week of flowering
Week 9
Leaves. Color - Yellow
Leaves. Color - Black or grey
5y ago
2
2
Solved
OneBakedWalrus
Black tips
One more. What's up here? Its happening to 2 plants but I've no idea why. No changes no stresses.looks like a nutrient problem. But if it is what is it and how do I fix it? I dont usually feed but if it will help ill get something.
Leaves. Color - Black or grey
6y ago
1
1
Solved
Dippp
Problem with plants in the 3rd week of vegetation.
Hello everyone, I am new grower, in the 3rd week, I started having issues with the leaves. Does anyone have a diagnosis for this? I am using I am using Advanced Nutrients (Coco Grow A and B, B-52, Voodoo Juice) Coco Soil Temp: ~26 C Rh: 60-65% Feminized seeds Thanks :D
Leaves. Tips - Burnt
Leaves. Curl down
Leaves. Color - Black or grey
2y ago
1
Solved
darbyog
Black marks on leaves of a slow grower.
Noticed there's black markings on the edges of the leaves on our slowest growing plant. My initial thought was water droplets sitting on it before it had fully broken out or could it be something else?
Week 2
Leaves. Color - Black or grey
6y ago
1
1
Solved
Smokeyboar
leaf problem what would it be cheers
Leaf problem
Leaves. Color - Black or grey
6y ago
1
2
Solved
lovely_neighbours
Brown black spot crispy edges
I need help! Northern Light has Reddish brown spots turning dark-gray and crispy dark edges on the top leaves! It looks like a different issue from week 6 where gray spots appeared on the bottom leaves? Any ideas? Thanks
Week 8
Leaves. Edges burnt
Leaves. Color - Dark-brown
Leaves. Color - Black or grey
4y ago
2
2
Solved
HierroYOlivia
Dark tips
it seems to me that the tips of the leaves have a very dark color, it looks like an excess of nitrogen but in three weeks I have never fertilized and the only additions to my biobizz light mix are a sprinkling of guano kalong and 10% of worm humus biobizz.
Week 3
Leaves. Color - Dark-purple
Leaves. Color - Black or grey
5y ago
4
3
Solved
Zegr8
Leaves burn
Hi! Is this nutes burn? Damage is on the upper/middle part of the canopy on very few leaves, but many more have black tips. I’m puzzled because during veg I was feeding the plant higher ppm than now and never had a problem!
Leaves. Edges burnt
Leaves. Tips - Burnt
Leaves. Color - Black or grey
6y ago
2