Too much phosphorus?

Discussion in 'Sick Plants and Problems' started by KBRA7, May 11, 2019.

  1. #1 KBRA7, May 11, 2019
    Hi,

    some of top teaves on one of my plants looks like this.
    [​IMG]

    Could this be caused by giving too much phosphorus?
     
  2. #2 KBRA7, May 11, 2019
    Last edited: May 11, 2019
    Also, I'm in week 5 of flowering. But the problem started to occur in about week 2 or 3 of flowering and it only got worse. I give them a full dose of Biobizz Bloom nutes so it is definitely not a deficiency. pH is also at the right range.
     
  3. #3 KBRA7, May 11, 2019
    A picture of my own:
     

    Attached Files:

  4. #4 monvrch, May 11, 2019
    Looks like nitrogen toxicity to me.. Welcome to GC
     
  5. #5 Sade, May 11, 2019
    Heard to tell but even leafs in back look very dark green which means way too much nitrogen.
     
  6. #6 mactheman, May 11, 2019
    looks like ot much nitrogen.leaves are canoeing under as well ,,,,mac,
     
  7. #7 KBRA7, May 11, 2019
    Last edited: May 11, 2019
    Thanks for the input guys :) I have low RH in the box (even with a humidifier) so canoeing is probably caused because of that. My girls gets only .5ml/l of biobizz grow per wattering so I doubt it could be related to nitrogen. However, I accidentally put too much epsom salts when they had a really bad magnesium deficiency so dark leaves is probably a result from that... Actually, when I think more about it, all of my problems started after too much Mg... I flushed everything twice but problems still occurs: calcium deficiency (or lockout) is the worst one happening right now. Also I was getting dark spots (phosphorus deficiency) so I increased bloom nutes, and then purpleing started to happen. Lots of yellowing at the bottom leaves. pH were always in a good range. My plants were doing great until Mg incident, and now blooming is slow ...

    Do you guys have any suggestions how should I complete this grow? Increase/decrease nutes, give more/less calmag? Or should I stick to usual portions of nutrients + calmag until flush? As I already gave them a proper flush twice after too much Mg. About 3 weeks left until harvest.
     

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