This always happens late in flower

Discussion in 'Sick Plants & Problems' started by Lesso, Feb 6, 2017.

  1. Feb 6, 2017 #1

    Lesso

    Lesso

    Lesso

    Mad Scientist

    Joined:
    Mar 5, 2012
    Messages:
    746
    Likes Received:
    19
    I always seem to get cal or mag deficiencies late in flower. This time it started at 49 days. This has happened when i have used gh 3 part or floranova 1 part. I typically run 1500 to 1200 ppm in ro water during flower. My ph will fluctuate between 5.6 to 6.2. I dont know how to treat other than flush the plants and dump my res. It didnt work this time however. Is there a way to prevent this in the future. Should i ramp up the cal mag around week 7? Im certain its hurting my yields. The perfectionist in me is irked to say the least.

    20170206_101928.jpg
     
  2. Feb 6, 2017 #2

    Budlight

    Budlight

    Budlight

    Well-Known Member

    Joined:
    Sep 11, 2016
    Messages:
    2,405
    Likes Received:
    162
    I was having the exact same problem not sure if I have figured it out yet or not wish I had more advice for you there's lots of smart people on here though somebody should be able to identify it
     
  3. Feb 6, 2017 #3

    RubyRed

    RubyRed

    RubyRed

    Well-Known Member

    Joined:
    Apr 8, 2014
    Messages:
    589
    Likes Received:
    5
    I start Cal/Mag in week 2 flower. why wait till its too late?. Did you not see signs a couple weeks ago?

    tcabs
     
  4. Feb 6, 2017 #4

    Lesso

    Lesso

    Lesso

    Mad Scientist

    Joined:
    Mar 5, 2012
    Messages:
    746
    Likes Received:
    19
    I hope some one can. It isnt all that distressing but it is frustrating.
     
  5. Feb 6, 2017 #5

    Kraven

    Kraven

    Kraven

    CannaMycologist

    Joined:
    May 3, 2014
    Messages:
    4,366
    Likes Received:
    151
    Occupation:
    Cannabis / Mushroom Farmer
    Location:
    “A place is only as good as the people in it.”
    Lesso it looks like your Ph is getting off, more than likely due to salt build up in the medium. When you see this with or without tip burn you need to flush the medium to clear the salts because the pH in the root zone is off. Also try cutting your bloom nutes by 20% next run, as long as they don't look hungry keep it that way....that will help with salt build up. Or do a mid flower flush as you begin to take the N away and replace it with P and K for the final bulk, that way the medium wont have excess N left over and not being used. I hope this was helpful. Peace

    Edit: In error I never asked what medium your using....if hydro it's the same issue, just easier to handle and it corrects very quickly.
     
  6. Feb 6, 2017 #6

    Rosebud

    Rosebud

    Rosebud

    Organic dirt farmer Staff Member Admin Moderator

    Joined:
    Jan 2, 2010
    Messages:
    22,480
    Likes Received:
    3,590
    Gender:
    Female
    Some folks start the cal mag much earlier, do you think that is it?
     
  7. Feb 6, 2017 #7

    SHOT

    SHOT

    SHOT

    Well-Known Member

    Joined:
    Feb 25, 2016
    Messages:
    321
    Likes Received:
    4
    Curious to know what is the problem... it could happen with anyone of us!
     
  8. Feb 6, 2017 #8

    umbra

    umbra

    umbra

    Well-Known Member

    Joined:
    Dec 12, 2007
    Messages:
    10,312
    Likes Received:
    6,602
    Gender:
    Male
    the GH 3 part has cal/mag so if you see it late in flower, it is mostly a ph problem and nute lockout rather than a lack of it.
     
  9. Feb 6, 2017 #9

    bombbudpuffa

    bombbudpuffa

    bombbudpuffa

    Sweet Cheeba Chiefa

    Joined:
    Oct 28, 2006
    Messages:
    5,880
    Likes Received:
    4,628
    I'm going with pH issue too. I have one plant with similar leaves and it's from something I gave the plant(chem bloom booster in an all organic grow).
     
  10. Feb 6, 2017 #10

    Lesso

    Lesso

    Lesso

    Mad Scientist

    Joined:
    Mar 5, 2012
    Messages:
    746
    Likes Received:
    19
    All good info. thanks all. Kraven, I am in hydro i will flush again, re fill my resivior, and run lower ppms. Umbra i think its more ph too. Bombbp, i am using bud candy but i have been since week 2.
     
  11. Feb 7, 2017 #11

    SHOT

    SHOT

    SHOT

    Well-Known Member

    Joined:
    Feb 25, 2016
    Messages:
    321
    Likes Received:
    4
    Goodluck lesso
     
  12. Feb 7, 2017 #12

    bombbudpuffa

    bombbudpuffa

    bombbudpuffa

    Sweet Cheeba Chiefa

    Joined:
    Oct 28, 2006
    Messages:
    5,880
    Likes Received:
    4,628
    All I meant is my booster threw my pH off and my plant looks like yours. Didn't mean to imply you were giving yours something that was throwing yours off though I do believe you have a pH related problem. Sorry I wasn't more clear:).
     
  13. Feb 7, 2017 #13

    Kraven

    Kraven

    Kraven

    CannaMycologist

    Joined:
    May 3, 2014
    Messages:
    4,366
    Likes Received:
    151
    Occupation:
    Cannabis / Mushroom Farmer
    Location:
    “A place is only as good as the people in it.”
    It's pH..... more than likely he had a rapid change inside the recommended range of 5.7-6.2. I'm not saying his pH is outa whack, but a rapid change will do this every time. I run a 55 gal rez with a 45 gal ATO so as the res needs water the ATO [automatic top off] keeps the rez at the right volume....that also makes me have a positive ramp from 5.7 - 6.2 over 7-10 days, at 10 days I don't change the rez and drop the pH back to 5.7. I do an add back of 20% of all the nutes which drops my pH again to around 6.0....and bumps my ppm up about 200....not a huge change and I will let that run until the pH hits 6.2 or the ppm's drop below 800. Then a rez change but I run it from 5.9 -6.3 for the rest of flower using the above method. My average flowering ppms run around 1200. Hope this is helpful lesso, you girls look great, they are just doing the pH bow for a minute.
     
  14. Feb 7, 2017 #14

    zem

    zem

    zem

    Well-Known Member

    Joined:
    Dec 6, 2009
    Messages:
    3,066
    Likes Received:
    289
    Lesso! I have had this, it is caused by many factors that stress the plant in late flowering, and plants at that stage are easy to show stress. Last time I tried I had 4 res's trying to combat this issue and it turned out that the plants were much happier with higher ec as i progressed, so that I would get to week 5-6 close to 2000ppm. Another factor is the sudden fluctuation in ph and/or fert concentrations. all other factors like temps and humidity have more effect on the plant in flowering, and there is the factor of salt build up and what else. What I am saying is that it is somewhat normal to have some issues in later flowering, it is like you are trying to keep the plant alive when it is trying to die. I use the following guidelines only for reference: week1 1200ppm, week 2 1400, W3 1600, W4 1800, W5 2000 maintain it there until ripening then i decrease gradually until harvest for 1 week. This is very dependent on strain and fert type, but I have found that doing so helped a lot in forming more bud
     
  15. Feb 7, 2017 #15

    The Hemp Goddess

    The Hemp Goddess

    The Hemp Goddess

    Granny Mod Staff Member Admin

    Joined:
    Aug 22, 2006
    Messages:
    19,068
    Likes Received:
    7,673
    I always add Cal-Mag during flowering when using GH 3 part.
     
  16. Feb 8, 2017 #16

    Lesso

    Lesso

    Lesso

    Mad Scientist

    Joined:
    Mar 5, 2012
    Messages:
    746
    Likes Received:
    19
    Great info. I did have a rapid swing of the ph. Spot on
     
  17. Feb 8, 2017 #17

    Lesso

    Lesso

    Lesso

    Mad Scientist

    Joined:
    Mar 5, 2012
    Messages:
    746
    Likes Received:
    19
    Great advice. Do you run co2? My tips started burning on this strain at 1550 ppm. I backed it down a bit and got a sudden spike when i mis-measured the nutes. Also swung the ph like crazy.
     
  18. Feb 8, 2017 #18

    Lesso

    Lesso

    Lesso

    Mad Scientist

    Joined:
    Mar 5, 2012
    Messages:
    746
    Likes Received:
    19
    I think you have said that you use ro water.....how much cal mag and when i.e. week 1 through 6 etc?
     
  19. Feb 8, 2017 #19

    zem

    zem

    zem

    Well-Known Member

    Joined:
    Dec 6, 2009
    Messages:
    3,066
    Likes Received:
    289
    No co2, some strains cannot take high ec and the type of ferts is basic. Too much N in any fert will cause many problems, I use fertilisers from raw chemicals and mix myself giving me more flexibility. It is also very good to increase ppm gradually I was adding it like daily, doing a lot of daily analysis trying to figure out what is missing and trying different things in different res's, also the phosphate ion is very tricky to maintain and i found calcium to be way way overrated as a problem especially with tap water.
     
  20. Feb 8, 2017 #20

    Lesso

    Lesso

    Lesso

    Mad Scientist

    Joined:
    Mar 5, 2012
    Messages:
    746
    Likes Received:
    19
    Zem....do you find as i do that most problems in hydro stem from ph?
     

Share This Page