Does this look like a cal/mag issue?

Discussion in 'Marijuana Plant Problems' started by yankeeny20, Feb 13, 2018.

  1.  
    yankeeny20

    yankeeny20 Member

    I noticed some spots on my plant this morning so I was reading up on what it might be. I'm thinking it could be a calmag deficiency but just wanted another opinion.

    It's indoors in soil going on week 5 of flowering. I water about 2-3x a week feed-feed-water. I'm using Aurora innovation nutes and calmag at about 75% recommended amount. My other two plants are looking good and I'm feeding them all the same. Should I just up the calmag for this lady or is it something else?
     

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  2.  
    Tiffj

    Tiffj Well-Known Member

    Calcium and magnesium are two different things, so you can’t have a calmag def, however yup looks like you need to add calcium, how long have the leaves been like this? Did you add calmag before the leaves looked like this or after? Tbh the light green also indicates you may have a magnesium problem also.
     
  3.  
    yankeeny20

    yankeeny20 Member

    I was using the diagnose page on growweedeasy.com and misread it. I meant calcium or manganese def as the other it looked like. It also mentioned spots and yellowing.

    http://www.growweedeasy.com/manganese-deficiency-cannabis

    I just noticed it slightly yesterday and today so it must be recent.
     
  4.  
    ANC

    ANC Well-Known Member

    Increase your non NPK part of your feeding regime.
    Most of these "deficiencies are caused by excesses, or an absence of microbes to convert the ions into a usable form for the plant.

    I would at the same time but no less important. brew a 24 hour earth worm casting tea and spray down the whole plant, especially the damaged leaves. , pour the rest out over your roots.
     
    Blitz35 likes this.
  5.  
    yankeeny20

    yankeeny20 Member

    Got a link with any info on teas? Never heard much about them until just recently, not sure how they work.
     
  6.  
    ANC

    ANC Well-Known Member

    Have a look on youtube... Your first teas probably won't be very good. But it is still miles better than any cure you can pour out of a bottle or bag. Plants, like us, live in symbiosis with bacteria and fungi. Did you know just a 3rd of your poop is actually made up of food remains....?

    These bacteria and fungi are found in and on all cells of the plant.
     
    yankeeny20 likes this.
  7.  
    Hydrowannabe

    Hydrowannabe Well-Known Member

    This question continues to, well, question me....if calcium and mangnesium deficiencies are unrelateable (both aren’t very mobile but I think calcium is completely immobile nute), why do they make a calmag product with directed dosages on it. Shouldn’t they make some kind of foliar spray separately, at least for calcium. Maybe they do??.
     
    yankeeny20 likes this.
  8.  
    Tim1987

    Tim1987 Well-Known Member

    Dont quote me, but im pretty sure "botanicare" made it because they didnt buffer their nutes properly.
    A+b has more calmag than you think. Just check you bottle.
    Check your ph first. Adjust.
    Then check your ec's. Adjust.
    I think you have toxicity.
     
    xtsho likes this.
  9.  
    ANC

    ANC Well-Known Member

    It is almost NEVER a deficiency. More often a lockout through pH or medium getting hot because it does not get watered until runoff.
    You can mix a recipe for soil, and it will have an excess of just about everything just so there is enough plant-available nutrients for the short-haul.
    After a few weeks, that portion is spent, but the soil is fucking hot and few microbes thrive in that. So , people throw out the fucked up soil and start a new pot from a new bag being shipped in from fuck knows where. You can turn virtually any soil into a rich, living environment in about 300 days. It just takes a little foresight. This time next year, you could have soil that will grow plants that kill bugs that try to eat them. They are THAT healthy.
     
    xtsho, yankeeny20 and Blitz35 like this.
  10.  
    Hydrowannabe

    Hydrowannabe Well-Known Member

    I have about two leaves that are completely isolated from the rest of the plant that look like this. Now there is just one. The deficiency was mobile enough to spread throughout the this entire leaf, but the rest of the plant is untouched. Makes me think it’s a calcium something or other. The rest of the plant is very green and robust. Not trying to hijack your thread ha, just showing what I thought was a “calmag” issue. I use the reccomeneded dose of hgs calmag of 1 tsp/gal,..putting my base water at 150-200 ppm
     

    Attached Files:

    Tim1987 likes this.
  11.  
    Hydrowannabe

    Hydrowannabe Well-Known Member

    That leaf started out looking like the OP’s leaf. Hopefully the op doesn’t have to many leaves like that bc I think it only progresses in the leaves that you see the symptoms
     
  12.  
    Tim1987

    Tim1987 Well-Known Member

    Yes.
    But until you know the PH and ec/ppm of your media. You're guessing!
    PH?
    Ec/ppm?
    Good luck.
    Tim
     
  13.  
    yankeeny20

    yankeeny20 Member

    I've been reading up on organics these last few weeks and plan on making a super soil for future grows. I like the idea of maintaining a healthy soil and just letting the plants do their thing. I've been doing this for a little less than a year so I'm still learning a lot as I go.
     
  14.  
    yankeeny20

    yankeeny20 Member

    ph was right around 6.5 from runoff

    I have a tds meter for ppm. Can I use that on the runoff as well to see what the soil is sitting at? I've only used it to check my tap which comes out around 120ppm. Never checked water with nutes or runoff.
     
    Tim1987 likes this.
  15.  
    ANC

    ANC Well-Known Member

    That plant is overall in good condition, I wouldn't change anything over two leaves.
     
  16.  
    Tim1987

    Tim1987 Well-Known Member

    Only if you have a small pot! Runoff only gives you an accurate average of the whole pot. You could have hot spots. You wont know.
    You can mix a soil sample with distilled water. Then test it with an ec/ppm or ph metre. Just google the ratio. I can never remember.
    I like to use stake metres to monitor swings in ph. Im pretty sure they sell ec/ppm ones now aswell. Just dont rely on both their accuracy.
    Good luck.
    Tim
     
    yankeeny20 likes this.
  17.  
    Hydrowannabe

    Hydrowannabe Well-Known Member

    I wasn’t sure if you were talking to me or the op ha,.. bc I have all blue lab equipment. I am very confident where my ph and ppms are at. I’m thinking you were talking to the op bc I had said that when I use the reccomended dose of calmag, it brought my base up to around 150-200 ppms..I didn’t guess that haha. But to the other guy that said I shouldn’t change anything bc of those two leaves,...I completely agree. I’mwasnt going to unless it started to spread, but I think it’s an immobile calcium deficiency that I’m guessing started from the place I got the clone from, but like you said no big deal. Just didn’t want the ops leaves to all turn to that lol. That would be bad
     
  18.  
    yankeeny20

    yankeeny20 Member

    Most of them did but it was close to harvest so I just chopped them. I'll have to see how it turns out.
     
    Tim1987 likes this.
  19.  
    Tim1987

    Tim1987 Well-Known Member

    Best of luck mate :bigjoint:
     
  20.  
    ANC

    ANC Well-Known Member

    That is natural for the plant to suck up everything from the leaves.
    They get old and photosynthesis reduces along with the sugars they feed the microbes that normally keep them fed.
     

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