Vote Now 🏆 for the Grow Awards 2025!
By continuing to use the website or clicking Accept you consent to our cookies and personal data policy and confirm that you are at least 18 year old. For details please see Privacy Policy and Terms
Accept
What does a leaf turning dark black mean?
R_A_Dstarted grow question 2 years ago
Why did the tips of the leaves of the plant turn black, precisely at the tip of each finger, and gradually began from the pointed tip of the leaf as if it were dying
Open
Leaves. Color - Black or grey
likes
Answer
Organomananswered grow question 2 years ago
Pictures or a diary would help IMMENSELY in being able to offer any sort of meaningful reply.
Otherwise it is all guesswork.........
likes
Complain
ernest_twwganswered grow question 2 years ago
It could be genetics.
It could be cold night temperatures.
It could be the start of a deficiency.
1 like
Complain
GrowingGrannieanswered grow question 2 years ago
Hmmm... don't even want to give us a photo let alone a diary? That would be of enormous help to us as we try to help you... but what you're describing is most likely nute burn... can't give you any advice beyond that as we don't have any information on what you're giving them in what amount...
Please start a diary and come back to ask you question... you'll not only get advice as to what the problem is but suggestions as to what to do about it.
Good luck.
1 like
Complain
Similar Grow Questions
Solved
hazaj
Dark leaves, clawingSo couple weeks ago my plant started turning into dark green colour . Using biobizz nutrients, using always 1/2 dosage, sometime even less in big pots. I though it was nitrogen toxicity. But not sure anymore. If anyone has idea what it could be? Using 0,5ml of their growLeaves. Color - Black or grey
a month ago
4
6
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
Helpa month ago
9
6
Solved
Cookiemonster297
Black dots - second opinion neededIm 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
3 months ago
2
3
Solved
Nachtjasmin
Schwarze Spitzen und Flecken nach Neemöl-/Kaliseifenbehandlung in der Dunkelphase. Schimmel? Dran lassen oder abschneiden? Bitte um Hilfe!03. November: Zu Beginn der Dunkelphase, einen Mix aus 200ml Wasser mit 2ml Neemöl, ein Schuss Rapsöl und 4ml Kaliseife, auf die Pflanze aufgetragen. Grund dafür ist ein Befall mit weißer Fliege. Alles habe ich nicht aufgetragen. Heute sehe ich schwarze Flecken. Ist das Schimmel?3 months ago
1
7
Solved
casperdog
Floweringhello
Farmers!
Is this normal?
What is the reason and what is the solution?
TnxLeaves. Color - Black or grey
4 months ago
2
3
Solved
Lunxoz
Gray spots, mold ?Hello i spotted these gray spots on my plant, i had one leaf that was half covered with it so i decided to cut it :( Is that a bad sign or something ? I posted 2 photos of the whole plant if u see another issue. The burnt leaves on top is bc i had to leave the light on (vacation)Leaves. Tips - Burnt
Leaves. Color - Black or grey
2 months ago
1
1
Solved
einamio
Weed doctors to the rescueDay 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🙏5 months ago
3
5
Solved
Amboss
Deadly LeavesStart Week 9 … is this a Problem or normal?Leaves. Color - Black or grey
4 months ago
1
Solved
Romobo16
Black spotsIt's the last clon from that strain that I have (There are no longer seeds for sale) after saving her (She was in terrible conditions) she was growing great this last 5 days until yesterdays that I saw this black spots.
PPM 670-PH 5.78-WaterT 68.7-AirT 71.6-PPFD 120-Humidity80%Leaves. Curl up
Leaves. Color - Black or grey
4 months ago
2
Solved
einamio
I keep loosing leaves to some sort of nasty necrosis. It affects leaves at all levels, small and big randomly. I had to remove a lot of dying foliageAt first it looks like a asymmetrical spot of leaf starting to thin out to lighter color then tissue dries and turn black. I have high runoff EC3.3 and I blame Easy boost pellets because I only add rootjuice 1ml/L and sugar royal 0.5ml/L to my water. What is it and how I fix it?4 months ago
5
5
Solved
Frnikola
What to do? → BF Runtz Auto - Day 42 - RH70, 80F in BioBizz Light SoilOn 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
5 months ago
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 :DLeaves. Tips - Burnt
Leaves. Curl down
Leaves. Color - Black or grey
5 months ago
1
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
5 months ago
1
2
Solved
canongun
Leaves are turning into dark green with a plastic-like textureI have 3 ladies in my tent. While the others looking healthy, one of them has a darker green tone with a texture like plastic and shiny. Everything is the same (fertilizer ratio, coco medium), however the one on the picture has a problem. What might be the problem folks? 😩Leaves. Curl down
Leaves. Color - Black or grey
6 months ago
3
2
Solved
longearringboy420
Black spots on leavesBlack spots present on some fan leaves. During ~3rd month right now. Watering with HESI in Coco Coir, PH ~6 every time, 1/2 runoff water.
For about 2 weeks prior to this, I also added very small amount of kelp powder.
Soil seems fine.Leaves. Color - Black or grey
8 months ago
2
Solved
MarcoCasanova00
Pest infestation left my plant folded and weak. I treated it, but now blacked out leaves?Ants were farming an oval shaped bug's secretions that was eating my stem and going underground, leaving a trail of a film-like substance.
Treated it with neem oil, cigarette butt tea, garlic and dishwasher soap to fend them off. Black leaves now. Tips?8 months ago
2
3
Solved
kenpachi42
ist das sclimmKennt sich wer damit aus und kann mir sagen ob das schlimm ist? das ist mein erster grow und nur diese pflanze hat auf ein paar blättern diese punkte
danke schonmal im vorrausLeaves. Color - Black or grey
10 months ago
5
4
