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Thread: Cal/mag deficiency

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    Exclamation Cal/mag deficiency

    Unfortunately I can't say I'm new to growing, I've been at it for a while in fact. Yet I'm running into this issues the last couple harvests, and now I'm reaching out for help. It seems to me it's a calcium or magnesium deficiency, or both. The last watering included: 1 Tblsp Pure Blend grow, and 1 Tspn of cal mag. This mixture ppm's at 650, and they're in soil. I feel like something's wrong with this picture, hence the deficiency I'm looking at here.



    [img]

  2. #2
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    Re: Cal/mag deficiency?

    Looks like a lockout due to pH.

    Twisted leaves=pH problems .... usually

    Any idea of your run off pH?

    DD
    If you own 28 different foods, 65 different additives and 14 jugs of molasses and not one single book on plants, then that is the problem. WB

    It's not the bow, it's the Indian. unkn

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    Re: Cal/mag deficiency?

    You know DD I really don't know. I've been watering @ 5.9 - 6.0, I'm sure the runoff's pH is than that though. Do you think getting the pH to run off @ 6 is better rather than starting @ 6?

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    Re: Cal/mag deficiency?

    Quote Originally Posted by LiveTour View Post
    You know DD I really don't know. I've been watering @ 5.9 - 6.0, I'm sure the runoff's pH is than that though. Do you think getting the pH to run off @ 6 is better rather than starting @ 6?
    Uuuuuhhhhh .... Neither .. 6 is lockout low.

    6.5-6.8 is where you want to be in soil.

    You REALLY ought to invest in a ~$20 pH pen off ebay.

    DD
    GigaGrew likes this.
    If you own 28 different foods, 65 different additives and 14 jugs of molasses and not one single book on plants, then that is the problem. WB

    It's not the bow, it's the Indian. unkn

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    Re: Cal/mag deficiency?

    Ok right on! I have a digital pH test meter so that will work of course. I'll bump the pH up on the next watering Thanks DD!

    Now should I mix my water/nutes to a higher pH (6.3-6.5), or shoot for that for a run off value?

    thanks again!

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    Re: Cal/mag deficiency?

    6.5-6.8 in and out.

    Powdered dolomite lime will take care of bot the pH and cal/mag issues. Get some.

    DD
    If you own 28 different foods, 65 different additives and 14 jugs of molasses and not one single book on plants, then that is the problem. WB

    It's not the bow, it's the Indian. unkn

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    Re: Cal/mag deficiency?

    Looks like I'll adjust my pH to about 6.3-6.4 on today's watering. I'm thinking they'll bounce back before I switch the lamp to 12/12 :D

    About the doomlite, would I sprinkle it on the top soil, is that cool?

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    Re: Cal/mag deficiency?

    Correction, I'll be watering with a 6.5 today

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    Re: Cal/mag deficiency?

    Yes, sprinkle it on the top and water in.

    2tbl/gallon of mix.

    Make sure it's powdered, not pellets.

    DD
    If you own 28 different foods, 65 different additives and 14 jugs of molasses and not one single book on plants, then that is the problem. WB

    It's not the bow, it's the Indian. unkn

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    Re: Cal/mag deficiency?

    Cool, thanks again DD!

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    Re: Cal/mag deficiency

    Where can you get powdered dolomite? Is it already in growing mediums like Pro-Mix?

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    Re: Cal/mag deficiency

    Quote Originally Posted by MJGenius View Post
    Where can you get powdered dolomite? Is it already in growing mediums like Pro-Mix?
    In my area, only Lowes has the powdered (it's labeled ground), everyone has the pellets including Lowes.

    Some mixes have some added, but not enough.

    DD
    If you own 28 different foods, 65 different additives and 14 jugs of molasses and not one single book on plants, then that is the problem. WB

    It's not the bow, it's the Indian. unkn

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    Re: Cal/mag deficiency

    ****UPDATE****

    The plants haven't shown any signs of increasing deficiencies, and are looking better which is great. So far I've just increased the pH level. I picked up the dolomite today at the hydro store, so I'll be adding that on the next watering. I like how the smallest bag they had was 50lbs heh heh. I have enough dolomite for a while it looks like

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    Re: Cal/mag deficiency

    Last edited by Be Irie; 12-09-2010 at 07:49 AM.
    WizHigh likes this.

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    Re: Cal/mag deficiency

    Thank you ladiedutchess it did

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