Start My Diary
Start My Diary
Login
Sign Up
Login
Start My Diary
Home
Diaries
Shorts
Questions
Contests
Growers
Strains
Seeds
Breeders
Nutrients
Lights
Equipment
Blog
English
Espanól
Русский
Deutsch
ไทย
Login
Start My Diary
Sign Up
Following
Follow
Brands
&
Growers
to get updates
Chat
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
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
likes
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
Growmun
Good grow
Week 2
Leaves. Color - Dark-brown
7y ago
2
1
Solved
TripleCcannabis
Seedling Curling up and browning
Neither one of my new seedlings seem to be doing very well. This one isnt as brown as the other but its leaves are starting to curl. There still ridged but are curling up.
Week 1
Leaves. Curl down
Leaves. Color - Dark-brown
5y ago
1
Solved
Walleyeguy
Canoeing and Brown Spots of leaf edges and tips.
I have some Canoeing and Brown Spots forming on tips and edges of some leaves. Both Top and lower leaves. Not sure what issue is ? Please see pictures. This is a coco grow so soil suggestions might not be helpful.
Week 11
Leaves. Edges burnt
Leaves. Color - Dark-brown
5y ago
5
5
Solved
Misanthrope
Noob grower
Gorilla Bomb, outdoor grow, directly in soil, Miracle Gro 20-20-20 once per week. In the past few days, leaves have developed brown to black spots that start at edges and spread inward. I have 1 Green Crack under identical conditions and another GB and GC in outdoor pots
Leaves. Color - Dark-brown
4y ago
4
Solved
ganzigunnu
this means?
only deficiency showing now, started feeding only recently. why could have this happened?
Week 7
Leaves. Color - Dark-brown
1y ago
4
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
5y ago
1
1
Solved
Hesperik123
Brown spots. Any idea guys ?
Something wrong is going on with my first grow. My last watering ( with ph 6.4 ) guanokalong grow 0,5ml/l ..... bloom guanokalong bloom 0,5ml/l .... piranha Advanced Nutrients Piranha 1ml/l .... Guanokalong BatBoost 2.7ml/l ... Sensi Cal-Mag Xtra 0.5 ml/l. Flowering week 3.
Leaves. Edges burnt
Leaves. Color - Dark-brown
Techniques. ScrOG
5y ago
1
2
Solved
Kratistos
2 Autos week 8 flo 2
The leaves on the upper plant wake up today with a brownish spot. It’s not light burning for sure (ts 1000 dimmer 70% height 50-60cm). Feeding problems? The first two photos are dark brown, the last one is yellowish.
Leaves. Color - Dark-brown
1y ago
2
Solved
Stixere
Leaves
What can be wrong and what should I do?Biobizz fertilizers(Grow, Bloom, Topmax). 6 weeks.
Leaves. Color - Yellow
Leaves. Color - Dark-brown
4y ago
2
Solved
beetyjooce
Deficiencies
Hey guys, First two pictures are from one plant and the third is from another. Any idea what the issues are? First two pics I’m thinking phosphorous? The markings are only in one section though. Second I’m thinking cal mag? Thanks everyone
Leaves. Color - Dark-brown
3y ago
1
1
Solved
Titocat
calcium deficiency
one plant is showing signs. pic included. had a few nute feeds, recipe as follows (per 2 litre) 1ml bio-grow, top-max & bio-heaven 2ml bio-bloom 24/7 lights; biobizz allmix i treated with bug clear on leaves and added sticky yellow tape q: what dose of CalMag with above ?? ^
Leaves. Color - Dark-brown
Other. General questions
2y ago
4
3
Solved
minibox
Calcium or roots trouble?
Hello happy grower, New week and new trouble but on the second plant. Those brown dots appear today. Is it a cal/mag defficiency or roots trouble? I will check roots tonight. Thank you forward for your advise!
Week 6
Leaves. Color - Yellow
Leaves. Color - Dark-brown
Feeding. Deficiences
3y ago
10
11
Solved
Soulgrow_x
What causes this
What is this ? Happened over night
Leaves. Tips - Burnt
Leaves. Color - Dark-brown
3y ago
1
3
Solved
jbirdstheword
Burn, deficiency or other?
I’m completely stumped as to why my one plant is showing signs of deficiency or burn. Used the exact amount of fertilizer per plant. One plant is fine and the other looks terrible. I used a half dose of cal mag and it seems to have stopped but is not drinking or looking better.
Week 7
Leaves. Curl down
Leaves. Color - Dark-brown
Feeding. Deficiences
4y ago
3
2
Solved
Happy_Farmer
Help me please! Some nutrient problem
Hey guys! Can you help me in this guys! The girls start to appear this 2 days ago! What is this ? Some excess or deficiency? The small One also show a start of some problem Really apreciate any help. Cheers !
Week 2
Leaves. Color - Dark-brown
4y ago
1
2
Solved
Samurai0627
Are you deficient in calcium?
Black spots appeared on the leaves. What is the cause? Flowering 6 weeks
Leaves. Color - Dark-brown
3y ago
1
Solved
GoGscrash
What is wrong:/
please advise me what shortage or surplus could be
Leaves. Color - Dark-brown
4y ago
1
3
Solved
BadGrower
Need experienced organic grower help!
Growing in coco with organic dry amendments and worm castings. Had to give calmag 2 times at a low dose. Water PH 6.1-6.4 carbon filtered every time. Just flipped to flower yesterday. Weird spots on leaves. Phosphorus or calcium issue? Plant is growing vigorously just a few spots
Leaves. Color - Dark-brown
4y ago
2
Solved
Elendil
Too much nutes?
Is this from too much nutes ?
Leaves. Curl up
Leaves. Color - Yellow
Leaves. Color - Dark-brown
5y ago
4
3
Solved
burnerac
I’m seeing brown on the lower leaves. They also appear particularly shiny like a magnolia leaf. Is this too much iron or magnesium?
Week 7
Leaves. Color - Dark-brown
5y ago
3
3