Pro Mix PH

Discussion in 'Marijuana Plant Problems' started by sharks, Jan 6, 2009.

  1.  
    sharks

    sharks Active Member

    I am using a pro mix as a grow medium. Please advise if this is a soil or a soiless medium. Also what PH should this medium be? I appreciate al help.
  2.  
    frmrboi

    frmrboi Well-Known Member

    Pro Mix is all I've ever used. It is considered a "soiless" mix as it contains no soil (as in black topsoil) Fresh out of the bale it's Ph is low until it's moistened and the limestone can react with the peat to counteract it's acidity. You have to keep it flushed with each watering to the point of heavy runoff to keep the Ph at it's proper level. I don't know what the PH is after wetting but it's good as I've had no problems as long as you keep flushing it.
  3.  
    sharks

    sharks Active Member

    Frmrboi, Thanks.

    What ph is the water you are watering with?
  4.  
    frmrboi

    frmrboi Well-Known Member

    I don't know, I don't have a tester.
    I use rainwater (Vancouver, we get LOTS) which I'm told is 7.0.
  5.  
    Picasso345

    Picasso345 Well-Known Member

    What kind of Pro-Mix is it?
  6.  
    sharks

    sharks Active Member

    Hey Picasso, its Premier Pro- Mix got it at a grow shop. Not sure what PH to water with so my plant has both nute burn and nitro deff.
  7.  
    Picasso345

    Picasso345 Well-Known Member

    Your water, after you add nutes, should be at a PH of 6.5. I would suggest using that Pro-Mix straight out of the bag with no additions on your part.
  8.  
    sharks

    sharks Active Member

    Thanks big guy.
  9.  
    overmyhead

    overmyhead Well-Known Member

    Hey Farmboi, I'm getting ready to use pro mix - waht do you mean by keeping it flushed. Do you flush with water between feedings? Or you just mean that you let the nuted water run through?

    Thanks!
  10.  
    Ghost420

    Ghost420 Well-Known Member

    i use promix as well. what there refering to is flushing out the salts that build up from nuting.


    water enough so that each time a little water come out of the holes at the botem
  11.  
    overmyhead

    overmyhead Well-Known Member

    Thanks, do you feed them every time you water?
  12.  
    Ghost420

    Ghost420 Well-Known Member

    no i do a big dose once per week
  13.  
    overmyhead

    overmyhead Well-Known Member

    Thanks. What ppm's is it when you feed? The food that is.
  14.  
    Ghost420

    Ghost420 Well-Known Member

    last feeding i had a ppm of 1250 stepping it up this week
  15.  
    SpruceZeus

    SpruceZeus Well-Known Member

    In my experience, promix will slowly drift your ph up. I've had to use Ph down to counteract this.

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