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
Leaves have brown spots
Flyalivebeats
started grow question 4y ago
Any idea what these brown spots could be?
Solved
Leaves. Color - Dark-brown
1 like
Roberts
answered grow question 4y ago
You are experiencing progressive potassium deficiency. Light nitrogen and heavy potassium are phosphorus in flowering. Good luck🌱
1 like
Complain
Selected By The Grower
Coopmc
answered grow question 4y ago
You should find answered hear I sugest finding a feed scheadual and follow it
likes
Complain
Coopmc
answered grow question 4y ago
https://www.royalqueenseeds.com/blog-cannabis-nutrient-and-deficiency-table-n88
likes
Complain
Coopmc
answered grow question 4y ago
https://www.botanicare.com/faqs/can-i-foliar-spray-with-cal-mag-plus/
likes
Complain
Coopmc
answered grow question 4y ago
https://growace.com/blogs/learning-center/how-to-fix-nutrient-lockout
likes
Complain
Flyalivebeats
answered grow question 4y ago
So what should I do?
likes
Complain
Similar Grow Questions
Solved
JSanchezz
Pls Help leafes are somehow spottet with Brown spots
Have some leavrs random top and bottom spottet with smal prown "dots" Whst could that be? Pvd 1.2 rh 62 25c day7 flower 32dli Organic soil
Leaves. Color - Dark-brown
2y ago
7
Solved
Jaykut22
I have no idea what these brown spots are on my seedling?
Brown/ rusty looking spots on seedling. Only thing I did was spray with a Epson salt and B52 foliar spray. The soil is deprived of magnesium so that’s why. I think I corrected by using cal mag. The sister plant is a few weeks ahead and showing recovery.
Leaves. Color - Dark-brown
3y ago
1
1
Solved
WeedBerry
Leaves
Hi leaves are going to 2 shades of green any help?
Leaves. Color - Dark-brown
6y ago
1
1
Solved
No_Clout
Their appears to be rusty looking cracks on a few leaves never incourtered this before so it would be great if someone knows what this symptom is and how to cure it, it would be much appreciated! ✌️🏻🍁
Week 3
Leaves. Color - Dark-brown
8y ago
3
4
Solved
TheNoobDude
Nutrient lockout, ph imbalance or nutrient burn?
Unfortunately I don't have a ph meter, so my best guess is one or more of these problems: nutrient lockout, ph imbalance or nutrient burn. The first 3 photos are from an Auto Northern Light and the last 2 are from an Auto Jack Herer.
Week 6
Leaves. Edges burnt
Leaves. Color - Yellow
Leaves. Color - Dark-brown
6y ago
1
1
Solved
Greenlady
What happend? I just started feeding them yesterday with this, but the others are just fine.. Did i burn it? What should i do?
Leaves. Color - Dark-brown
6y ago
4
Solved
JO_GROW
Hey guys, I've got some slight yellowing on the leaves, from what I'm reading it looks like abwarlterlogging issue but I'm not sure. New to growing so would really appreciate some advice before this gets worse. Thanks.
Week 2
Leaves. Color - Dark-brown
7y ago
5
3
Solved
Smokeyboar
cal and mag canna coco
Leafs I think its cal and mag but unsure. If it was how do I correct it. Do I say flush with 10 20 liters and then give it 1 mill cal and mag per litrr all canna nutes I use
Leaves. Color - Dark-brown
6y ago
1
Solved
Puffdamagikchillum
OUCH!! What is it?
Deficiency or toxicity? This is in ffhf/coco/Perlite/ewc ph'd @ 6.5 ff nute trio +Calimagic. feed and water once a week in 5gal pot led 14" above plant. My diary tells the rest. 1/4tsp Calimagic 1/2tsp of trio 2lts water.
Leaves. Color - Dark-brown
6y ago
1
1
Solved
Dillsnills
Can someone plzz help with what is going on?
Can someone plzz help me w what's going on, not sure if it has to do with nute deficiency,nute burn, ph or what it's only w 2 of my plants a lemon autoseedmans Orange Sherbert Auto fast buds, should I trim the leaves that r affected or in general what can I do. Ph 6.5 wk6flowerin
Leaves. Color - Yellow
Leaves. Color - Dark-brown
Feeding. Deficiences
6y ago
1
2
Solved
THC123
Brown/Gold Stripes?
What is this? I read it’s Mag deficiency, but I put more CaliMag in yesterday during the res change. PH remained the same as well, 6.0. I topped yesterday as well. Any ideas?
Week 4
Leaves. Color - Dark-brown
6y ago
2
3
Solved
Therapy420
Browning lower leaves
The lower leaves on the Purple Punch in front are turning brown, what could this be? I am using Easy Boost pellets by RQS as nutes, water is ph'd to 6.5 in BioBizz Light Mix.
Week 7
Leaves. Color - Dark-brown
5y ago
2
2
Solved
meangreenmachine
Spider mites?
What do you think the problem with leafs are during my week 4? I have noticed the there was discoloration on some levels and somewhat looks like someone might be eating from underneath of the leafs.
Week 4
Leaves. Color - Dark-brown
4y ago
1
2
Solved
Kynareth
Ilness or deficency?
Hello I have noticed some lack of green and brown marks on some leaves. They are all from one plant and mid-low distance from light. You think its nutrient deficency or some ilness? I have noticed that the coco was really dry so i opened a bit more the irrigator.
Leaves. Color - Dark-brown
4y ago
4
3
Solved
JohnyV
Hello friends, do you know what kind of issue could be these brown spots. It appeared one day ago. I grow in coco perlit with canna feed according feeding chart. Thank you for your advices..
Leaves. Color - Yellow
Leaves. Color - Dark-brown
3y ago
5
Solved
Tomi589
Hojas marrones
Hola soy nuevo, quería saber cual es el motivo de estas hojas amarillas marrones que tengo . Soy novato es mi tercer cultivo , podría ser quizás sobrefertilizacion , falta de algún nutriente o algún bicho? Envio fotos de las hojas afectadas y la planta en general.
Leaves. Color - Dark-brown
5y ago
1
2
Solved
Firststategrower718
Think that I over fed #1
Got these brown leaves after the last feeding and I think it's phosphorus or potassium to toxcity. If anyone has a idea I would appreciate any advice this plant has been a nightmare
Week 8
Leaves. Color - Dark-brown
4y ago
2
2
Solved
RuiNas
Why did it become like this?
in the first week these brown spots appeared ... Can anyone help me understand why only this plant of 4 ended up like this?
Leaves. Color - Dark-brown
1y ago
2
2
Solved
Lolberries
Need help
Anyone able to tell me what this is.
Week 9
Leaves. Color - Dark-brown
5y ago
1
Solved
Duke_Elak
Unsure what?
It might be caused of overcompensating Water and/or to often. Also Im RE uses last crops soiless mix as medium. 30%perlit 30%peat moss in HYDRO claypebbles 40% Coco coir Dried for 2month before washubg and BUFFERING with cal mag. WHAT can it be?? Doesnt look good at all?
Week 1
Leaves. Edges burnt
Leaves. Color - Dark-brown
Plant. Too tall
6y ago
2
2