Nitrogen claw + something else early stage?

H

Hobblebush

Active Member
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You can see consistent clawing on the plant but pictured below is what’s confusing me
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leaf on the right is curling down under itself and the lighter colorationhas a somewhat scaly texture. It’s on the new growth, and showing up more and more. I noticed it today, I watered 2 days ago pH 6.4, 4ppm

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the new growth at the stop is contorted and clawing...
 
Bukvičák

Bukvičák

Well-Known Member
It seems to me as a sudden pH drop (leaf discoloration) and nitrogen abundance (clawing). I would water them with plein water pHed to 7.0 and check the runoffs pH end EC. When your drop will be till 5,9 max!!! then the pH should be okay and EC shouldnt be higher than 3,0. Or if you have soil pH pen than messure it directly... than you will know more
 
H

Hobblebush

Active Member
Salty88 said:
To me it looks as if you're over feeding. It appears to be nito-toxicity. If they start clawing down then the tips burn and they claw up (while clawing down) its nitro-toxicity
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Yeah they have both up and down. I haven’t fed in a month :/ just water
 
S

Salty88

Member
What type of soil are you using? Is it a timed-realease soil? Those things are the devil for growing cannabis. You won't be able to do a proper nutrient feed until it's completely depleted from your soil.
 
MidwestGanja

MidwestGanja

Member
Im with salty, looks more like toxicity given how dark green the majority of the plant is. Usually a deficiency will cause the plant to be more light green
 
dannyboy602

dannyboy602

Well-Known Member
I don't see claw...leaves are a little dark not overly so. Look up claw and you'll see leaves that are radically different than what youre dealing with. But no claw. Ima say it's a calcium def or too low ph which locks out calcium uptake. A tbsp of garden lime will fix the problem on NEW growth but it won't change the damaged leaves. Did you add calcium to your soil mix when you prepared it? Is there calcium in the fertilizer you use? And you havent fed in about a month? So maybe thats it.
 
S

Salty88

Member
dannyboy602 said:
I don't see claw...leaves are a little dark not overly so. Look up claw and you'll see leaves that are radically different than what youre dealing with. But no claw. Ima say it's a calcium def or too low ph which locks out calcium uptake. A tbsp of garden lime will fix the problem on NEW growth but it won't change the damaged leaves. Did you add calcium to your soil mix when you prepared it? Is there calcium in the fertilizer you use? And you havent fed in about a month? So maybe thats it.
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In the first picture you see clawing/curling on almost all the leaves. Though, I don't disagree that it could be a deficiency of Calcium, I think it is caused by excess Nitrogen. Which in turn would lock out Calcium. The fact that he hasn't fed in a month and is still exhibiting curling, to me, means that he caught it in time. It's the super dark green leaves plus the curling that spells out toxicity to me (but yes, not a serious or advanced case)
 
Skyhound

Skyhound

Well-Known Member
hi there , just had the same problem and a bit more severe and solved it . The problem was that my ph reader was not calibrated and instead of
giving 6.0 + ph i was giving water with 5.0 ph . I had the claw , dark green leafs and some cannoing on the worst plant . I studied the problem
couldn´t be nitrogen toxicity because in that range of 5.0 plant cant absorb much nitrogen , and came out with a info on net that says that plants
watered with 5.0ph can have multiple toxicitys . Calibrated scanner again , watered with ph range 6.4 6.5 and plants recovered , new growth leafs are fine . To summarize it looked like N toxicity but it was other nutrient unknow toxicity just from bad ph
 
H

Hobblebush

Active Member
Skyhound said:
hi there , just had the same problem and a bit more severe and solved it . The problem was that my ph reader was not calibrated and instead of
giving 6.0 + ph i was giving water with 5.0 ph . I had the claw , dark green leafs and some cannoing on the worst plant . I studied the problem
couldn´t be nitrogen toxicity because in that range of 5.0 plant cant absorb much nitrogen , and came out with a info on net that says that plants
watered with 5.0ph can have multiple toxicitys . Calibrated scanner again , watered with ph range 6.4 6.5 and plants recovered , new growth leafs are fine . To summarize it looked like N toxicity but it was other nutrient unknow toxicity just from bad ph
Click to expand...
Yeah ill check again. I have calibration fluid and I calibrate it freqeuntly. Usually my pH reads around 6.3-6.5
 
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