Pro-Mix BX and PH problems

Discussion in 'Marijuana Plant Problems' started by Ason, Dec 26, 2012.

  1.  
    Ason

    Ason Well-Known Member

    Im currently using a Pro-Mix BX,EWC,sheep humus mix and I added 1tsp of dolomitic lime per approx gallon. I water my plants with a water ph of 6.5 and it comes out at 6. So obviously my soil ph is very low. Im using peat based product so thats what i get I guess. Im currently getting a Magnesium deficency most definitely which i believe to be lockout. I also just tried sprinkling some on the top before i water aswell as disolving a bit in the actual water and my water runoff was still very low as far as my water ph test could tell. Seems when the runoff is merky its a little hard to tell the ph test results but it definitely is not yellow (6.5) my question is how much dolomitic lime do i need? and are the results from sprinkling/putting in the water immediate? also my question is can I overdo it with the lime? My lime is in granulated form which i grind to a powder. Thank you
     
  2.  
    colonuggs

    colonuggs Well-Known Member

    Calmag and about a teaspoon of bone meal mixed up in about a gallon of the medium
     
  3.  
    Ason

    Ason Well-Known Member

    You mean botanicare calmag? which is a liquid no? I want to use my dolomitic lime which is a calcium magnesium mix also I am not growing organic I use GH flora series.
     
  4.  
    hydroponickush

    hydroponickush Member

    I use pro mix bx/ worm castings/ and domolite lime at 2tbsp per gallon and my plants look like shit. Pro mix bx sucks , Im really pissed off that my plants turn lime green/ yellow when I have a buffer in the medium and ph in the soil itself is 6.4 wtf. If you have cal/mag deficiency which I know how that is with this shitty soil , you can also use epsom salt or botanicare cal/mag.
     
  5.  
    Ason

    Ason Well-Known Member

    my runoff is coming out 6 after being 6.5 going in so i think my ph is way down. Yea i really wish I could get something better it seems like the greenhouse's around here use the pro-mix bx thats where i got it from. Otherwise my only other real option is sunshine mix #4. I think my plant has a mg defiency because its being lockedout. Does this make sense? Ill try and post a pic later
     
  6.  
    colonuggs

    colonuggs Well-Known Member

    i use sunshine #4 which is about the same as promix...mabey a different source of the peatmoss

    with some strains I notice brown spots and leaf curl....phours def
     
  7.  
    Kite High

    Kite High Well-Known Member

    I use promix hp with excellent results...dolomite lime is a great buffer but ime breaks down too slowly to supplement....Cal-Mag plus is what I use and ro water
     
  8.  
    Ason

    Ason Well-Known Member

    I think i figured it out I added 2 tbsps of dolomitic lime per gallon of medium and potted all my new guys in that and my older plants i kept putting a bit on top 2 times i watered and it seemed to straighten it out. The mg defiency dosent seem to be spreading anymore.
     
  9.  
    Ason

    Ason Well-Known Member

    i used the dolomitic lime to neutralize my soil so that i could get a ph of 6.5
     
  10.  
    Kite High

    Kite High Well-Known Member

    as well in VERY SMALL amounts as it can/will fry your plants
     
  11.  
    Ason

    Ason Well-Known Member

    I used dolomitic lime which was granulated but i crushed it in a mortor and pestal lolll Im thinking of finding a old coffee grinder just for grinding up my lime. I looked everywhere in town and the only stuff available was granulated dolomitic lime
     

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