NUTE BURN OR SOMETHING ELSE?

Discussion in 'Sick Plants and Problems' started by cryptachronic, Dec 25, 2013.

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  1. #1 cryptachronic, Dec 25, 2013
    I have a single plant flowering at 33 days since the flip in a 5 gallon bucket. Medium is 60% happy frog and 40% perlite. The bucket has a 2 inch layer of peagravel along the bottom for drainage. Using technaflora recipe for success starter kit for nutrients. 150 watt hps+104 watts of 6500k cfl. Temps top out at 82 during lights on and drop to lowest of 63 in the dark. Avg canopy temp is 75. Please refer to my journal for more details of the grow. So I noticed symptoms of what seems to be nutrient burn a while back. Yellowim of lower leaves, dry brown tips progressing from leaf tip to stem. Well, at the time I noticed it it was not progressing so I decided just to start giving it plain ph'd water (not a full flush) instead of feedings, until the problem corrected itself. Well after a week of doing this and never quite goimg away, the problem resurfaced with a vengeance. 50% of EACH of my individual lower leaves developed (in this order) 1-crispry dark brown tips ranging all the way up the serrated edges, 2-yellowing working its way from tips to stems, 3-after yellowing they developed necrosis that spreads from tips to stem. The day before yesterday on 12-23-2013 I flushed it with 5 gallons of ph'd tapwater and a very microscopic dose of flowering nutes to help leech the soil. Now two days later the problem has yet again progressed. I have been trying to avoid pouring 15 gallons of water through her because she has compacted the soil quite a bit. Is this nutrient burn or could this be a potassium deficiency or a combination of things? Ill post two sets of pictures, the firdt set with this post is as of 2 days ago.JOURNAL- http://forum.grasscity.com/index.php?/topic/1252916-Bagseed-and-me...the-boba-fett-trialsNAME THAT STRAIN- http://forum.grasscity.com/index.php?/topic/1265559-Indentifying-strain
     

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  2. #2 cryptachronic, Dec 25, 2013

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  3. #3 cryptachronic, Dec 25, 2013
  4. #4 cryptachronic, Dec 25, 2013
  5. #5 waktoo, Dec 25, 2013
    Since you've been a GC member for so long, I will assume that this is not your first rodeo, and you are familiar with how to properly water plants.

    Not to be offensive or demeaning, but that looks like CLASSIC signs of overwatering or compacted soil.

    Do all of your affected leaves look like they are suffering from the same "affliction", or are they showing varied forms of "nutrient deficiency".
     
  6. #6 cryptachronic, Dec 25, 2013
  7. #7 mmman, Dec 25, 2013
    Don't mean to sound off like this, but your plants appear to display symptoms of multiple nutrient lock-out. When the root-zone ph drops Mg and Ca can and are often the first expressed, then P and K. I can definitely see expressive symptoms of K and Mg. Ca and P may have been better absorbed. I would attempt to correct the ph of the root-zone. My two cents.
     
    http://boards.cannabis.com/attachments/plant-problems/281235d1325194867-brown-spots-some-twisted-leaves-some-tips-curled-down-phchart.jpg
     
  8. #8 oldskoolgrower, Dec 25, 2013
     
    This.  Good advice.  Looks like the ph is off causing nute lockout like mmman says.
     
  9. #9 cryptachronic, Dec 26, 2013
  10. #10 mmman, Dec 26, 2013
     
    Thanks for the vote of confidence, Bud.  :smoke:
     
  11. #11 mmman, Dec 26, 2013
    Last edited by a moderator: Dec 26, 2013
     
    I'm going to be a bit presumptuous and say the root-zone could possibly be as low as 5.5 assuming we have a lock-out of K. Do you have any method of testing the root-zone ph? Meter? Strips? Are you opposed to using baking soda one time? I'm not a huge advocate myself, but it'll be a quick fix that will probably show absolutely no ill effects to your girl. You could use commercial ph up? What to you want to use and do you have anything available?
     
  12. #12 cryptachronic, Dec 26, 2013
    I gently dug up half a cup of soil from varying depths around the root ball, soaked this with 1/2 cup of ph 7.0 water while gently stirring. Strained this and measured with my Milwaukee ph 600 digital meter. Its really only made to measure liquid ph. Anyway the slurry that I strained I tested. The ph of the "runoff" that I had made was at 7.2 I think this means I should drop the ph right? I mean I don't have any way to buy more grow supplies at this point whatsoever. I'm completely tapped. JOURNAL- http://forum.grasscity.com/index.php?/topic/1252916-Bagseed-and-me...the-boba-fett-trialsNAME THAT STRAIN- http://forum.grasscity.com/index.php?/topic/1265559-Indentifying-strain
     
  13. #13 mmman, Dec 26, 2013
     
    If your root-zone was that high in ph your plant would visibly display symptoms of of Fe and Mn... doesn't look like that to me and what about your meter, trust it? Do you have any strips?
     
  14. #14 mmman, Dec 26, 2013
    Can you get us some pix of the whole plant, especially the top? And, is it possible that you have been entirely underfeeding the girl?
     
  15. #15 mmman, Dec 26, 2013
    If you have a bit of confidence in that meter, with the flush the medium is probably corrected. I'd feed at half strength if you think the flush worked and your meter is correct.
     
  16. #16 mmman, Dec 26, 2013
    @[member="cryptachronic"], I apologize for the rambling, I went back and reread the original post, been jumping around too much. It's possible that you corrected the medium with the last flush. What say you? Can you shoot more pics?
     
  17. #17 cryptachronic, Dec 26, 2013
    It will have to be tomorrow. Lights are out tonight. I don't fully trust the meter but it hasn't ever done me wrong ans has always been very accurate. Im confident that somehow I've locked multiple nutes. I need to get RO water tomorrow and ph it to 6.5 with half strength nutes but I don't bave strips either. I think I'm just gonna roll with whatever happens within a couple days of watering her. I think I will only be giving her a 1 gallon feeding though. Evrn with having flushed a couple times and some compaction my soil mix is still fairly loose all things considered. I get runoff pretty quickly. Ill update this tomorrow. JOURNAL- http://forum.grasscity.com/index.php?/topic/1252916-Bagseed-and-me...the-boba-fett-trialsNAME THAT STRAIN- http://forum.grasscity.com/index.php?/topic/1265559-Indentifying-strain
     
  18. #18 oldskoolgrower, Dec 26, 2013
    Personally I'd flush with no nutes then follow with half strength after 12 hours or so.  It won't kill them and will clean things out faster.  They should be fine.
     
  19. #19 cryptachronic, Dec 26, 2013
  20. #20 cryptachronic, Dec 26, 2013
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