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
What is this?
Tonno
started grow question 5y ago
Can someone explain to me what is this?
Solved
Leaves. Color - Dark-brown
1 like
Roberts
answered grow question 5y ago
Calcium deficiency
likes
Complain
Selected By The Grower
Similar Grow Questions
Solved
nocluehowto
Should I cut these off ?
leaves are no longer crispy and dry but are still rapidly changing colour, not sure if I should cut them off or let them fall off themselves ? if I cut them off would it be beneficial ? not sure if the plants still putting in energy to keep these leaves on the plant or not ?
Week 2
Leaves. Color - Dark-brown
5y ago
8
5
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
IceeTea31
Help
What is the issue? do they need calmag or should i flush them? if i should flush them what ph should this water have?
Leaves. Tips - Burnt
Leaves. Color - Yellow
Leaves. Color - Dark-brown
2y ago
5
5
Solved
womba
Leaf spot fungus? PH/Nute problem? More calmag?
So my climate and numbers all look good so these are my theories Leaf spot PH/Nute burn Deficiency I havent watered till heavy runoff much at all i only did it after i saw this on the leaves. Not sure what i should treat this like
Leaves. Color - Dark-brown
Leaves. Color - Black or grey
1mo ago
3
Solved
420keef
My leafs turn yellow very fast sometimes with dark almost black spots on them is that normal? And what can i do about it?
Week 11
Leaves. Color - Dark-brown
8y ago
3
3
Solved
ElevatedNoob
I am seeing an issue with the lower fan leaves and it seems to be progressing upwards. The leaves are yellowing and also seem to be turning brownish. I added CalMag into my last feeding but beyond that not sure what I should consider, info/advice is appreciated. See last pic wk5.
Week 5
Leaves. Color - Dark-brown
7y ago
3
1
Solved
MedicineMaker
Calcium Deficiency?
Any ideas on what this could be? Water 90% RO with 10% well water 110PPM, PH 6.0-6.5, Autoflower, Day 29 of grow, Fox Farm Ocean Forest, No nutes added yet as I heard FFOF was hot for autos, plan on nutes at preflower, 20/4 schedule w/240LED 100% at 90CM, DLI 40.
Leaves. Color - Dark-brown
3y ago
2
2
Solved
FirstGrow
Brown spots on leaves?
I have brown spots on one out of my 3 autos, it's mainly on one leaf. Does anyone know what this is? 450w via spectra LED 4gal pots coco & perlite 70% - 30% GH trio + calmag 1L each every day - 2.5ml calmag, 4ml micro, 1ml gro, 5ml bloom 6.2-6.5 ph [no runoff].
Leaves. Color - Dark-brown
6y ago
4
Solved
Lapaluma420ohe
Verfärbte Blätter
Verfärbte und teilweise vertrocknete Blätter bei meiner Autoflower in Woche 9. Nährstoffmangel, Nährstoffüberschuss, zu viel Licht? Grobe mit biobizz biogrow, biobloom und topmax. Woran könnte es liegen?
Leaves. Color - Yellow
Leaves. Color - Dark-brown
1y ago
3
3
Solved
Milly808
Leafs getting brown color..what happened?
Need help for this issue
Leaves. Color - Dark-brown
6y ago
3
2
Solved
MazzeoN
help, I don't know what's wrong
Goodnight! Does anyone know what could be happening to this plant? at first only the lower leaves were affected, but now all the new shoots are affected little by little
Buds. Other
Leaves. Color - Dark-brown
Plant. Other
4y ago
1
2
Solved
Jan_Jan
Flecken auf Blatt und Halm oder Helikopter-Mutter
Die 2 Flecken auf dem vorderen Blatt und die dunklen Stellen am Halm beschäftigen mich ein bisschen. Glaubt ihr, die Pflanze hat ein Problem oder mache ich mir mal wieder zu viele Sorgen? VP 10. Steht im 11l BB AllMix und wurde einmal am Anfang der VP mit 3l gewässert.
Week 2
Leaves. Color - Dark-brown
Setup. Strain - Autoflowering
Setup. Outdoor
2y ago
4
4
Solved
Granddaddy_Terp
Brown spotting?
Hey everyone! My plant is in her 5th week and a few days ago (around day 30) I noticed some brown spotting on a few of the mid/lower leaves. Does anyone know what this could mean? I gave her her first feeding 3 days ago. 1/4 strength veg nutes and 1/8 strength bloom nutes.
Week 4
Leaves. Color - Dark-brown
Leaves. Color - Mottling
5y ago
1
3
Solved
Frost
I’ve been using Biobizz AllMix and I fed her Advanced Nutrients Sensi Grow. Even tough flushed her twice, it has not stopped yet. Burned leaves symptom continues. Seems like it’s going worse.
Week 8
Leaves. Tips - Burnt
Leaves. Color - Dark-brown
Plant. Stem - Red or purple
5y ago
4
10
Solved
KINGT88
Leaves changing colors
Leaves are starting to curl down on one plant. Another plant the leaves are changing colors as shown in the video, what am I doing wrong? First time grower.
Week 4
Leaves. Curl down
Leaves. Color - Yellow
Leaves. Color - Dark-brown
4y ago
1
5
Solved
Magic43562
Tips turning brown
Tips on 1st node turning brown, is this regular?
Leaves. Color - Dark-brown
6y ago
3
3
Solved
GermanGrowsCannabis
Kann mir irgendjemand sagen was sie hat ? Es kann soviel sein ich Blick nicht mehr durch
Week 6
Leaves. Color - Dark-brown
7y ago
3
4
Solved
EvilGrower
Calcium deficiency?
I recently bought Calimagic for my calcium fix. Prior to this week I have been using tap water for calcium. Is 2mL/gallon of calimagic too little? Noticed some leaf damage I believe to be calcium deficiency. Does she need more calmag? Thanks for your help all!
Week 8
Leaves. Color - Dark-brown
6y ago
2
4
Solved
Bembeto
Carencia de Mg
Hojas en forma de bandera con manchas amarillas, sin dudas carencia de Mg, el problema es que no se que lo provoca, haré un estudio de acidez al suelo para estar seguro, pero dejo el hilo abierto a cultivadores más experimentados por si me podrían dar una mano con esto
Week 9
Leaves. Color - Dark-brown
5y ago
4
5
Solved
BeachGanja
Calcium Issue?
Hey everyone, got some limited leaf issues on the older growth. Appears to be a calcium deficiency, but would like your thoughts. 😎
Week 5
Leaves. Color - Dark-brown
6y ago
2
3