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Thread: Is this Nitrogen deficiency?

  1. #1

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    Default Is this Nitrogen deficiency?

    morning guys

    so before i start here is some info

    --black magic soil
    --900w led
    --temps showing lower as its gotten colder outside between 19c - 28c off and on.
    --sensi skunk strain
    --3rd week on 1212
    --RH 25-40

    I didn't give her any nutes until last week as she seamed very sensitive and even showed N toxicity from the soil
    I gave her seaweed xtract and Bio Canna Flores, and 2 days ago also gave her another feed of maybe 3ml to a few ltrs of water.

    from what I've learned so far the yellowing is saying N deficiency but Im not sure, and the rusting on the leaves I have no idea.

    any help will be much appreciated






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  3. #2

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    Quote Originally Posted by 420gen View Post
    morning guys

    so before i start here is some info

    --black magic soil
    --900w led
    --temps showing lower as its gotten colder outside between 19c - 28c off and on.
    --sensi skunk strain
    --3rd week on 1212
    --RH 25-40

    I didn't give her any nutes until last week as she seamed very sensitive and even showed N toxicity from the soil
    I gave her seaweed xtract and Bio Canna Flores, and 2 days ago also gave her another feed of maybe 3ml to a few ltrs of water.

    from what I've learned so far the yellowing is saying N deficiency but Im not sure, and the rusting on the leaves I have no idea.

    any help will be much appreciated





    It looks like you have a couple of things going on. Check out the cannabis infirmary section under cannabis basics.

    The 1st thing that comes to mind with the rusty looking spots is a magnesium deficiency. But wait for more experienced growers to wake up in the UK and give advice.

    Meanwhile, check out the infirmary. Lots of pictures and explanations there.

    Sent from my SAMSUNG-SM-N910A using Tapatalk

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    on it now man thanks, sometimes i get so worried and forget to actually have a look around

    and i think you might be right, comparing the pics it looks very similar to mg def

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    Most likely a mag deff from too many ferts blockin it out . Plant seems very dark and too much fertilizer can eventually lock out micros and secondary elements

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    what trex says dude.
    3ml is a bit much id back off to 1.5/2ml, you most always never follow the recomended dosage for nutes, less is more as it were. give them just water next few schedules then keep n eye on the new growth to tell you how things are coming on, you cant fix the already damaged leaves btw so forget about them.
    since yer in flower i wouldnt recommend a foilar spray, not saying it cant be done but its a buggery
    hope ya get sorted
    Last edited by lipnobody; 01-11-18 at 02:00 PM.
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    Ive given her some Epson salt, new growth seems to be fine, but i have a very strong ammonia smell past week and no idea why.
    ive only ever fed her 3 times maybe, the bottle recomends 40ml per feed, so i figured 3ml would be a small enough,

    Ive read so many different things regarding the ammonia, some say its mould, some say bad soil. soil doesn't smell and there is no mould on buds, so im hoping its just nitrogen evaporating or some shit as my house smells like cat litter and it bloody stinks lol


    Quote Originally Posted by Trex View Post
    Most likely a mag deff from too many ferts blockin it out . Plant seems very dark and too much fertilizer can eventually lock out micros and secondary elements

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    Is the ammonia smell coming from the soil or the plant? What soil are you using?

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    Black magic soil..... gotta read better.

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    Ammonia smell comes from my compost bin if that helps

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    It only started when i started feeding her nutes, I read that compost can do this if its too wet and the nitrogen doesnt allow the micro stuff to break down or something close to that, was pretty high when reading

    but when i grab a hand of soil and smell it outside, it just smells like soil. Im not gonna feed now untill i see hunger signs just to be on the safe side

    Quote Originally Posted by gardro View Post
    Ammonia smell comes from my compost bin if that helps

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    Are the nutes very old? If they smell like ammonia in the bottle then I believe they have gone bad. At least this is what I was told.

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    Quote Originally Posted by gardro View Post
    Ammonia smell comes from my compost bin if that helps
    I believe that means it needs a turn or sift.

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    Quote Originally Posted by CityDweller View Post
    I believe that means it needs a turn or sift.
    Ok thanks mate. Ive made one from a Wheely bin and drilled some holes. I will get a fork in there

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    Quote Originally Posted by gardro View Post
    Ok thanks mate. Ive made one from a Wheely bin and drilled some holes. I will get a fork in there
    Exactly what she needs. A good forking. Gotta break down the N with some oxygen. No more green until the smell dissipates. Gotta let it balance.

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    only bought it few months ago. they smell the same as when i first got it

    Quote Originally Posted by CityDweller View Post
    Are the nutes very old? If they smell like ammonia in the bottle then I believe they have gone bad. At least this is what I was told.

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    Quote Originally Posted by Trex View Post
    Most likely a mag deff from too many ferts blockin it out . Plant seems very dark and too much fertilizer can eventually lock out micros and secondary elements
    the bottle recomends 40ml per feed, so i figured 3ml would be a small enough,

    40ml into 10lt is it? or 40ml into what amount? you might have added heavy strength feed into a heavily prefertilized soil that probably didn't need it
    where the lower leaves yellowing and new growth going very pale green? the sign in soil they need feeding

    id feed only water until they go green vs dark green black, as said it's just locking out everything

    only time i ever smelt amonia in a indoor soil pot was from me overwatering and that was killing the roots/soil due to no oxygen,
    smell went away when i corrected 4he wet/dry watering




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    I think its 10 ltr yes, the bottle I use holds 5 ltrs and i do half of it so 3ml to 2.5 ltrs usually . and you are right, this black magic soil is very heavy in fertilisers, the only signs of hunger was the magnesium problem, back then i just thought she needs nutes didn't think about mg def .

    no more nutes for now yes.

    I let her go pretty dry before feeding, sometimes the water runs through instantly when i water which I'm guessing is too dry?


    Quote Originally Posted by MonsterEnergy View Post
    the bottle recomends 40ml per feed, so i figured 3ml would be a small enough,

    40ml into 10lt is it? or 40ml into what amount? you might have added heavy strength feed into a heavily prefertilized soil that probably didn't need it
    where the lower leaves yellowing and new growth going very pale green? the sign in soil they need feeding

    id feed only water until they go green vs dark green black, as said it's just locking out everything

    only time i ever smelt amonia in a indoor soil pot was from me overwatering and that was killing the roots/soil due to no oxygen,
    smell went away when i corrected 4he wet/dry watering

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    Quote Originally Posted by gardro View Post
    Ok thanks mate. Ive made one from a Wheely bin and drilled some holes. I will get a fork in there
    Get soke straw in there gardo . Break it off in chunks and layer your pile . Let sit a week it will start steaming then turn your pile every 3 days or so .

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