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Back to Grow Questions
Leaves have brown spots
Flyalivebeats
started grow question 3y ago
Any idea what these brown spots could be?
Solved
Leaves. Color - Dark-brown
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Roberts
answered grow question 3y ago
You are experiencing progressive potassium deficiency. Light nitrogen and heavy potassium are phosphorus in flowering. Good luck🌱
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Selected By The Grower
Coopmc
answered grow question 3y ago
You should find answered hear I sugest finding a feed scheadual and follow it
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Coopmc
answered grow question 3y ago
https://www.royalqueenseeds.com/blog-cannabis-nutrient-and-deficiency-table-n88
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Coopmc
answered grow question 3y ago
https://www.botanicare.com/faqs/can-i-foliar-spray-with-cal-mag-plus/
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Coopmc
answered grow question 3y ago
https://growace.com/blogs/learning-center/how-to-fix-nutrient-lockout
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Flyalivebeats
answered grow question 3y ago
So what should I do?
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Similar Grow Questions
Solved
GIPeN
Is this a problem?
I have some old leaves with a reddish tint around the leaves, couldn't find any nutrient deficiency/excess that matches, maybe phosphorus?
Leaves. Color - Dark-brown
4y ago
3
3
Solved
PinkParrot
Brown leaves
[ Lemon Orange 70% sativa ] Lot of brown leaves, starting from the tip [ Persian pie 60% Indica ] less affected by the problem (same watering) { We tried } PH 5,7 | & high PH 6,2 EC 0.9 | EC 1.2 Upper light Cooler temp Higher Fans speed Note : Grow & Bloom bottles crystalized..
Week 9
Leaves. Tips - Burnt
Leaves. Tips - Die
Leaves. Color - Dark-brown
3y ago
6
6
Solved
odrex
What would be the cause of bronzed/rust spots on leaves?
Dual strain pheno hunt. One strain is experiencing bronzed/rust spots. What could be the cause? No pests/eggs to see. Assuming deficiency Soil: Gaia Green Living Soil amending with 3 TBSP/g 4-4-4, 25% worm castings and 4 TBSP/g wollastonite Water: 80 mL daily
Leaves. Color - Dark-brown
2y ago
1
2
Solved
Faust1a
Deficit
Hi guys please i would like to advise this phenomenon on the leaves it's in a few places on the vents you don't know what it could be? I will be happy for any advice.
Week 4
Leaves. Color - Yellow
Leaves. Color - Dark-brown
Leaves. Other
4y ago
2
2
Solved
CannaKrops
Possible deficiency or calcium needed?
Please help me figure this out! Sour Kush Auto, 3 weeks. No nutes yet, Ocean Forest soil. Other 3 strains, same age, no problems. Bottom leaves showed signs first, then next set showed. Deficiency or soil to rich? Thanks all! Ph 6.5
Leaves. Color - Dark-brown
3y ago
2
2
Solved
HAPPY91
Leaf Help Please
Whats with the discolor and clawing?
Leaves. Curl down
Leaves. Color - Dark-brown
4y ago
7
5
Solved
JKwonTheChef
Browning between leaf veins!
After my low humidity problem two days ago, she seems unhappy and the growth has basically stopped. I realize it should be slowing down at this third week but these brown, dry-looking areas are showing up between some of the leaves, the ones in the center being the worst. Thanks!
Week 10
Leaves. Color - Dark-brown
5y ago
2
2
Solved
Asuratyr
Nutrient deficiency? If yes, what's the best course of action to salvage the situation?
First time grower of 3 autos, at week 8, lower leaves started turning yellow, top leaves started to get smaller/develop brown spots 2 weeks ago. Is this a nutrient deficiency problem? Soil should have been fertilized for 3 months, but I'm thinking they burned through it.
Leaves. Color - Pale
Leaves. Color - Dark-brown
Feeding. Deficiences
4y ago
2
2
Solved
Kagonisss
Foliar problem flower
I have thi foliar problem I think is p or k deficiency help me pls
Week 6
Leaves. Color - Dark-brown
4y ago
1
Solved
Troy_McClure
soil ph is erratic fox farm ocean forest : pro-mix (3:1) - ph 6.3-6.8 run-off ph: plant 2: 4-6 plant 1: 5-6.8 watering / feed ph: 6.3-6.45 soil ph after water /feed: 5-7 soil ph when dry: 7.5-8 both plants treated 100% the same phosphorus deficiency / ph imbalance help please
Week 10
Leaves. Color - Yellow
Leaves. Color - Dark-brown
Plant. Stem - Red or purple
5y ago
4
3
Solved
SupportiveMango
What nutrient deficiency is this?
What nutrient deficiency is this? Or is it nutrient burn? I'm watering with 5.5 PH using half strength Nutes, Root booster & Calmag. I don't think it relates to spiders mites since I can't see any with my 30x magnifier. Thank you so much in advance.
Leaves. Color - Yellow
Leaves. Color - Dark-brown
Other. Bugs
3y ago
3
3
Solved
Mephistacheles
Black spots spreading // Need your help!
Anyone got a clue what this dark spots could be? It started in a corner of the tent with 1 plant a few weeks ago and now it has spread to another. I suspect pH issues and a nutrient lockout bc of that. Not sure if its the same issue though..Could be an infection as well...
Leaves. Color - Dark-brown
Leaves. Color - Black or grey
2y ago
1
4
Solved
BucerosRhinoceros
Brown spot on leave. 6 weeks into flowering. -Temp 27'C day 25'C night- HD 65% day 75% night . Soil PH 6.5-7.00. Water always at 6.5-6.8ph.
I just flush it 4 days ago because I think it got calmag lockout since I always give them around 5ml of calmag every watering. I only water when 2inch top soil dry with 1.5L of ph balance water. Not a fungus or anything that grow because It cannot be rub or remove from outside.
Leaves. Color - Dark-brown
3y ago
5
4
Solved
Stigghiola
Salve ho allegato qui alcune foto di un paio di foglie potrebbe essere problema di umidità?
Week 12
Leaves. Color - Yellow
Leaves. Color - Dark-brown
5y ago
3
3
Solved
Terp_Djiny
Nutrients?
Could anybody tell me what Kind of nutrient she need? Or whats her Problem?
Week 19
Leaves. Color - Dark-brown
5y ago
2
1
Solved
puppetmaster77
Rusty brown spotting on upper fan leaves, too much Tiger Bloom or deficiency?
Hindu auto, week 11 started seeing rusty brown spotting on upper fan leaves. At this point I was only using tap water and 4 tsp/gal of tiger bloom. That is aggressive so I backed off to 1.5 tsp. I watered with cal mag 1 tsp just in case it was deficient. Ideas? Buds seem ok.
Week 13
Leaves. Color - Dark-brown
4y ago
3
3
Solved
Happy_Rakosnicek
?
Leaves. Color - Dark-brown
4y ago
1
1
Solved
Skynet
Cal-Mag and N Deficiency in Flower? Thanks!
I'm guessing the yellowing and brown spots (in Wk 8 pics) are related to Cal/Mag and maybe a lack of N? Would love some advice from someone who's seen this before Thanks! I'm seeing this in all my grows to some degree- using FF trio and FFOF but not for much longer
Week 7
Leaves. Color - Yellow
Leaves. Color - Dark-brown
3y ago
5
5
Solved
Growsa
This is my first grow any help would be appreciate.
Week 6
Leaves. Color - Dark-brown
6y ago
2
Solved
Averynate
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