Nitrogen toxicity? Nute Burn? Or something else?

Logan Burke

Logan Burke

Well-Known Member
Your leaves are pretty light green for there to be any N tox going on...is the entire plant's leaves droopy, and light green like the leaves we see in the pic? Could we get a pic of the whole plant, or a description of where the symptoms are most? (Top, middle, or lower growth of the plant). My gut says that it looks like a magnesium issue, but I could be totally wrong here...how much Calmag are you giving? I'm pretty sure you're not having nute burn here, it's just too light green and the leaf tips aren't at all burnt. Have you ever flushed your medium? Not that it needs it, if the PH comes out higher than what you put in I seriously doubt you have a salt build up, that'd drop the PH coming out.
 
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Bigolebobe

Member
Logan Burke said:
Your leaves are pretty light green for there to be any N tox going on...is the entire plant's leaves droopy, and light green like the leaves we see in the pic? Could we get a pic of the whole plant, or a description of where the symptoms are most? (Top, middle, or lower growth of the plant). My gut says that it looks like a magnesium issue, but I could be totally wrong here...how much Calmag are you giving? I'm pretty sure you're not having nute burn here, it's just too light green and the leaf tips aren't at all burnt. Have you ever flushed your medium? Not that it needs it, if the PH comes out higher than what you put in I seriously doubt you have a salt build up, that'd drop the PH coming out.
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Sure thing! Here are a couple pics of the whole plant. It appears to be mainly be happening on new growth, and the top of my plant. Im feeding 5ml per gallon of cal mag with my other nutes.
 

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Logan Burke

Logan Burke

Well-Known Member
Hmmmmm....ok, thank ya Big the extra pics help! So, if you're adding 5ml calmag/gallon and the problem is still persisting, I would try increasing the PH of your water up to 6.0-6.5. Basically, if adding that much calmag isn't solving the problem, it means that for some reason your plant's roots aren't able to uptake the nutrients properly. Calcium and Magnesium absorb best above 6.0 in coco and hydro. This is, of course, assuming that is the issue. If it doesn't help at all, you'll know that it probably isn't calmag related. Also, make sure your calmag product has iron. Cal or Mag being offset can cause iron to be imbalanced and vice versa. If doing as I mentioned above doesn't fix the issue, then I would try increasing your base nutrients a bit. Maybe from 1000ppm to 1200ppm. But I'd only do that if increasing the PH doesn't help. Hopefully someone more experieneced in coco will stop by and chime in incase I'm missing something here. :)
 
B

Bigolebobe

Member
Logan Burke said:
Hmmmmm....ok, thank ya Big the extra pics help! So, if you're adding 5ml calmag/gallon and the problem is still persisting, I would try increasing the PH of your water up to 6.0-6.5. Basically, if adding that much calmag isn't solving the problem, it means that for some reason your plant's roots aren't able to uptake the nutrients properly. Calcium and Magnesium absorb best above 6.0 in coco and hydro. This is, of course, assuming that is the issue. If it doesn't help at all, you'll know that it probably isn't calmag related. Also, make sure your calmag product has iron. Cal or Mag being offset can cause iron to be imbalanced and vice versa. If doing as I mentioned above doesn't fix the issue, then I would try increasing your base nutrients a bit. Maybe from 1000ppm to 1200ppm. But I'd only do that if increasing the PH doesn't help. Hopefully someone more experieneced in coco will stop by and chime in incase I'm missing something here. :)
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Thanks for taking a whack at it! Im not overly concerned, because my plant does look healthy overall. However, I would like to get this corrected. Like you said hopefully some coco growers can give me some insight. :)
 
Logan Burke

Logan Burke

Well-Known Member
They do look pretty good, that's for sure! I know what you mean though, early intervention is the best intervention!
 
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