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Back to Grow Questions
Help :)
JoshuaTreez
started grow question 5y ago
Is this potassium deficiency? Or nitrogen toxicity?
Solved
Leaves. Color · Yellow
likes
HighRoller909
answered grow question 5y ago
yeah both. Nitrogen excess can create potassium deficiency, bear in mind. Too much N will block usage of K
1 like
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Selected By The Grower
Organoman
answered grow question 5y ago
I would go for potassium deficiency.
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Similar Grow Questions
Solved
Leonard_Lunte
Should I flush? (Overfeeding)
I think I have overfed my 2 dwarfs. Theyre showing signs like very stringy skinny new growth and yellow leaf tips. Theyre still growing and I dont want to stunt their growth, so all I want to know is if it is necessary to flush. Please tell me how to flush if so, thank you.
Week 6
Leaves. Color · Yellow
Feeding. Deficiencies
6y ago
3
4
Solved
Sconklin
Nutrient problems??
Is this potassium or light burn? Or something way different?
Week 4
Leaves. Color · Yellow
6y ago
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Solved
goldfinger
Phosphorus deficiency?
Hey everyone. I'm attaching a couple photos. I can't tell what's going on. pH going in is 6.3. Going out it's 6.1 I fed the plants less (nute burn) than a week ago with tiger bloom. Info is on my grow diary. Any info would be great. If you have any questions please ask. Thank you
Week 7
Leaves. Color · Yellow
5y ago
6
3
Solved
CroqueMonsieur
What is this leaf showing?
Anybody knows what is going on with this plant? My first guess was nitrogen toxicity because of the leaves clawing down a week ago, but I am not fully sure anymore with how the leaves are looking now.
Week 6
Leaves. Curl down
Leaves. Color · Yellow
6y ago
3
1
Solved
Bryde
best leaf insects repellent
I have found a few bad insects on my plants past weeks. Does anyone have experience with neem oil? Is it worth a try or would I be better of buying something else? White vinegar with dishsoap didn't help much. The bugs are: grasshoppers, stinkbugs, spidermites & fungus gnats.
Leaves. Color · Yellow
Other. Bugs
3y ago
2
2
Solved
UKAgent47
Sick plant
Help, my plant really looking sick and new leaves not looking that healthy. I have been feeding CalMag every other feed and only 850 ml every 24hrs and soil is dry on top layers before watering. Not sure what’s going wrong here. Much appreciate your help guys
Week 4
Leaves. Color · Yellow
6y ago
2
2
Solved
TheMechanic
Do I have a deficiency problem or am I ok? 3 lower leaves on both plants started with the tips browning but now the leaves are going yellow. None of the newer growth has been affected but the 3 leaves seem to be getting worse. See pics in week 4!
Week 4
Leaves. Color · Yellow
7y ago
4
3
Solved
Gongon
Small Yellow spot at the edge of bottom fan leaf
Hi there, I spotted small yellow dots at the edge of bottom fan leaf. Plant looks healthy but this dots makes me worrie, it might be begin of something bad, so far its really small. Does my plant need more N? Or maybe it's because of LED COB light and needs cal mag?
Leaves. Color · Yellow
6y ago
2
2
Solved
Herbangardener671
Leaves starting to look yellow @ week 4
So this lady is looking a little yellow in the leaves. Is there a concern here? She getting have the dose of fox farm trio but also haven’t been ph the mixture so its be either under 6.0 with nutes and over 7.0 w/ plain water. Also the 240 w led is at max @ 14in away.
Leaves. Color · Yellow
4y ago
3
4
Solved
Plant_Scientist
Dry or Feed?
What should I do to fix my plant? She has hanging leaves and yellowing for weeks. The summer has been pretty wet here, and the soil has been satiated a couple of times. It's getting dry now. Should I wait for the soil to completely dry or try feeding nutrients?
Week 17
Leaves. Curl down
Leaves. Color · Yellow
5y ago
2
3
Solved
LTBeatz78
deficiency with K
hello, I think there’s a problem, maybe a deficiency with K. I’m in all mix, I’ll start with nutrients yesterday
Week 4
Leaves. Color · Yellow
6y ago
1
1
Solved
The_cannabis_botanist
Yellow Leaves
I need some help for my TD2. I got some yellow leaves on top. I fed her with Iguana Grow 3 ml and 4 Ml Cal Mag plus on 3/08.
Week 7
Leaves. Color · Yellow
7y ago
2
2
Solved
Alwa26
What’s your opinion on this one?
What you think about it? Is she getting too much? I’m not giving her too much in my opinion. Her stems are purple and the leaves are yellowing a bit. Watering always with ph 6,3-6,5. Thanks for your help! Happy growing!
Week 7
Leaves. Color · Yellow
Leaves. Color · Pale
Feeding. Deficiencies
5y ago
1
Solved
OrganikTek
Light Stress, Colors Change, strong fan or Senescense?
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Week 7
Leaves. Color · Yellow
5y ago
4
4
Solved
Happyjack42
Nutrient burn?
Hello I have one plant with yellowing leaves that are also curling downward. Only one plant of 6 has this problem, I suspect maybe this one is just sensitive to the nutrient rich soil? I am using fox farm happy frog and have added no other fertilizer. What to do, flush all?
Week 5
Leaves. Curl down
Leaves. Color · Yellow
4y ago
2
3
Solved
Misanthrope
Discolouration progressing
The first pic is from 2 days ago, now the yellow has turned to brown spots and is beginning to spread to others. I'm hoping it's an easily corrected nutrient imbalance, please help
Leaves. Veins · Yellow between
Leaves. Color · Yellow
5y ago
1
4
Solved
Kamikaze
Yellowing leaves
Yellowing leaves. Woke up this morning to my lady looking more lighter in color. Medium is organic soil. Water ph 6.2. No ppm meter.
Week 7
Leaves. Color · Yellow
6y ago
1
1
Solved
MediciGrade
Brown spots and yellowing pictured above. My best guess is a Cal/Mag deficiency. Was feeding Botanicare Cal-Mag Plus at 1 ml/l up until ~2 weeks ago (friend has been watering while I was out of town). Before I feed her, any advice on what the problem is and how to correct it?
Week 14
Leaves. Color · Yellow
Leaves. Color · Dark-brown
7y ago
2
Solved
FoxyT
Plants heavily yellowing since week 4 of flower
Plants are yellowing too soon and too fast - if this persists they dont last the suggested 10-11 weeks -cant hang the 600W HPS any further away -havent fed too much nutrients if any too few -pretty sure i did not overwater Suggestions are appreciated thanks in advance
Week 16
Leaves. Color · Yellow
6y ago
3
3
Solved
Edenganj
Yellow spots/ mildew
Hi again, This is my roommates plant. I think it’s starting to get some type of mold on it. I spotted yellow and white specs.He sprayed it down with baking soda and water I guess, not sure how effective that is. what should he do? (Updated pics)
Leaves. Color · Yellow
Other. Mold
6y ago
2
2