PH Of Soil Is 7.5

Discussion in 'General Marijuana Growing' started by CriticalJack18, Sep 8, 2018.

  1.  
    CriticalJack18

    CriticalJack18 Active Member

    So I’m growing two critical jack herer autos and noticing Nute Burn when I feed at even the smallest dosages, 1/8th dosage every other watering and my leaves are turning yellow. I’m 48 days in and plants are flowering. They are probably hungry but I’m going to give them some ph water to flush them out and give them even less nutrients. I tested the soil with a soil meter and it came out to 7.5, which is pretty high. I water with the correct ph 6.2-6.5. What do you think is going on and what should I do? I’m using roots organic soil. Here are some pics...
     

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  2.  
    918Farmer

    918Farmer Active Member

    Forget the soil ph testers flush one of the plants or test runoff it will be more accurate. If ph is too high flush with lower ph water until runoff is the same last gallon you flush with add some nutes to it. Good luck
     
    CriticalJack18 likes this.
  3.  
    CriticalJack18

    CriticalJack18 Active Member

    So flush it with regular water? Test ph? If too high flush again with lower ph and nutes?
     
  4.  
    918Farmer

    918Farmer Active Member

    I would flush it with lower ph water to try to bring the soils ph down to an acceptable range somewhere around 6.3 and 6.5 seems to be a great number. On the last gallon I'd run some lower strength nutes in just so she can have something to feed on while recovering from the issue. Once things seem to be getting back to normal give her the normal bloom nutes
     
    CriticalJack18 likes this.
  5.  
    CriticalJack18

    CriticalJack18 Active Member

    Ok brotha. So I should water with a ph of what right now? 6.2-6.5? Because that’s what I made last night. Or should I go lower and make a new batch?
     
    918Farmer likes this.
  6.  
    918Farmer

    918Farmer Active Member

    I personally the first gallon or 2 I would run 5.7ish then the last 2 right around 6.2-6.5 as long as the runoff is the same as what you're putting in then you're good. Are you mixing your nutes after you ph your water or are you mixing them and then adjusting ph as needed? Within a few days it should work itself out. That's why I keep boomerang around for after I have an issue helps with the comeback.
     
  7.  
    918Farmer

    918Farmer Active Member

    And are you using ro water or tap ?
     
    CriticalJack18 likes this.
  8.  
    CriticalJack18

    CriticalJack18 Active Member

    Tap water I adjust PH to 6.2-6.5
     
  9.  
    CriticalJack18

    CriticalJack18 Active Member

    I mix them then adjust PH
     
    918Farmer likes this.
  10.  
    918Farmer

    918Farmer Active Member

    Okay thats perfect then you really shouldn't have a cal mag issue either with tap it already has calcium and magnesium in it I keep a bottle of botanicare cal mag just incase but have rarely had to use it just a splash here and there. I'm uploading a video to my channel now of what I use for nutrients and supplements just taking a long time to upload lol. And not knocking roots organic but I've read up on quite a few issues people have with it but apples and oranges right? I personally run ffof or hf, & upon transplants I use strawberry fields its higher in p and k which is used in flowering stage
     
  11.  
    Chunky Stool

    Chunky Stool Well-Known Member

    If you're using roots organics soil with synthetic nutes @ the correct PH, I wouldn't worry about it.

    The only time you need to flush is when you've got salt accumulation from overfeeding -- and it doesn't look like you do.
     
  12.  
    918Farmer

    918Farmer Active Member

    Looking at the pics of those plants the last thing I would say is dont worry about it. When you see stuff like that its definitely time to worry. Imo
     
    PURPLEB3RRYKUSH likes this.
  13.  
    918Farmer

    918Farmer Active Member

    At that ph the plant cannot uptake the needed nutrients in the stage it is in. Plain and simple
     

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    PURPLEB3RRYKUSH likes this.
  14.  
    xtsho

    xtsho Well-Known Member

    Then don't give them any food. Roots Organics has quite a bit of stuff in it.

    "Ingredients: Coco fiber, peat moss, perlite, pumice, premium worm castings, bat guano, kelp, fish bone meal, soybean meal, feather meal, greensand, leonardite and alfalfa meal."

    You're just going to be running around in circles chasing pH. You're growing in soil not hydro.
     
  15.  
    xtsho

    xtsho Well-Known Member

    You can't tell the pH at the root zone by checking runoff. The soil they're using is like a supersoil. Flushing a bunch of water through and then checking the pH is worthless. You have no idea what's washed out of the soil or if some of the amendments wash out more than the others. It's an organic soil. Leave it alone. Probably not any need for additional nutes either since that's when the OP started having issues.
     
    Richard Drysift likes this.
  16.  
    918Farmer

    918Farmer Active Member

    Whatever you think buddy had similar issue before and corrected it in the steps I took. Different strokes for different folks. In soil 7.5 is too high no matter what.
     
    PURPLEB3RRYKUSH likes this.
  17.  
    xtsho

    xtsho Well-Known Member

    Are you growing in organic soil? You can flush all you want but as those organic amendments continue to break down they continue to change the soil. The OP isn't growing in Promix which has nothing in it. They're growing in an organic soil with organic amendments. Dumping gallons of water and chasing pH is a waste of time with what the OP is using as a growing medium..

    Period...
     
  18.  
    918Farmer

    918Farmer Active Member

    Opinions and assholes. Apples and oranges. Then it shouldn't have helped mine while my grow was organic. But it did. Not gonna argue with anyones opinion. Simply stated what has worked perfectly fine for my past and recent grows. Goodluck Jack let me know how the grow progresses buddy
     
  19.  
    Richard Drysift

    Richard Drysift Well-Known Member

    If this was a ph or more accurately an absorbtion problem the entire plant would be locked out of nutrients and the newest growth at the tips would be yellow AF. Runoff ph tells you nothing useful in a soil grow. I would just water your plants as normal with 1/2 strength nutes & don't worry about ph. The yellowing is inside the canopy & is likely from a lack of light; only the shaded leaves are affected. Blurple LEDs can only penetrate so deep. My 2 cent
     
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  20.  
    xtsho

    xtsho Well-Known Member

    So now I'm an asshole? Cool.

    Took a look at your youtube channel. Why even have a channel? Telling people they have to have CalMag and your twenty bottles of fluff? I never use CalMag. I also wasn't impressed with those plants you had. I'll put my grows up against yours any day. Lets see some pictures of your stuff and not those scrawny plants on your youtube channel.

    And I didn't have to resort to name calling.

    Out of here.

    Sorry to the OP for mucking up their thread.
     
    Chunky Stool likes this.

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