Reliable ppm chart for marijuana??

Discussion in 'Hydroponics / Aeroponics' started by Merlin85, Jun 4, 2009.


    hxvoc Active Member

    I gave up on getting the right mix. Every run I have a deficiency. low, medium, high ppm doesnt matter I consistantly get rust spots on all of my plants. I still get some bud so im just about over it. fuck it I just deal with the rusty ugly looking plants. still seems to smoke ok when its all said and done
    sinnamon likes this.

    frankpetersen Member

    My parents did Alot of ACID,& I'm related to the scarecrow from the wizard of oz.this is y I ask u .

    Malevolence New Member

    your parents must have dropped a lot of brown acid

    farmerman421 Member

    does anyone have info on ppms of calcium and magnesium range they use through out a grow? I understand it is different in veg vs. bloom.

    medhed Active Member

    One of the bestest posts I've seen,especially if a noob does yet understand the definition...
    ProPheT 216

    ProPheT 216 Active Member

    Just to state the obvious here, because no one else has yet. If your feeding your plants and they are getting everything they need n u see early leaf drop and rust spots 9/10 times your over feeding. Your ec is to high. Especially if you see contrasting signs, like clawing and upside down canoes on the top of the plant and rusty falling leaves at the bottom. Nuts are being locked out and the plant just isn't eating well because the salts in the soil are higher than the salts in the root zone, MJ eats when the salts in the soil or water is less than the salts in the roots.
    Mullowman likes this.

    Jerseykushface Well-Known Member

    So lemme get this right if my tap water is at 100 ppm and i have a seedling i would want to add 100-150 more ppm from nutes to get my total ppm up to 200-250

    Terry385 Well-Known Member

    "i have a seedling" how old.. tap water is good for young seedlings

    Reliable ppm chart for marijuana??

    Redvirgo Active Member


    CAREBEAR-666 New Member

    Thanks Boss, this is just what this poor Welsh orphan needed, tidy boyo!
    Rony Ahmedaziz

    Rony Ahmedaziz New Member

    nice chart man. :) Thanks

    pinner420 Well-Known Member

    Budley Doright

    Budley Doright Well-Known Member

    When I first started hydro I fed half of what the chart for that product then used my meter to monitor the levels and if they dropped I would raise the EC next fill (every 7 days). I kept detailed records and when I started the next run I added the exact amounts for that EC. I did the same with the PH. As for rust spots, ya their a bitch and no it's not always caused by over feeding IMO. If you have unhealthy brown spotting then you should try to solve it as it does mean something is amiss, I was the same as I'm fuck it their ok lol, after doing some research with my particular setup and water (well) I was able to cure it and now plants are green till chop.
    butterbudface and sinnamon like this.
    Gregor Eisenhorn

    Gregor Eisenhorn Well-Known Member

    I remember I once raised the ppms to 800, but it was still dropping day after day 9somthign like 50-80 ppms daily). Does that still mean there's too little nutrients? I;m kind of scared of the thought of pushing it up to 1000.
    Budley Doright

    Budley Doright Well-Known Member

    LOL I know what your saying, been there. I really watch the plant more than the meter now and if the plants are happy, green, and growing I tend to feed the same and not push the limits. But yes most things I've read say if it's dropping then raise it.
    pinner420 likes this.

    Aeroknow Well-Known Member

    I end up at 1.7-1.8 EC in most of my setups.
    Last edited: Apr 1, 2016

    pinner420 Well-Known Member

    16grocurve.jpg rolling at 1.2 ~1.4 flower
    Sativied likes this.

    WeedFreak78 Well-Known Member

    How does that transfer over to ec/ppm?

    generally 1.8 -2.0ec here, as high as 2.3 on some before i see any issues, but i don't push anymore.
    Aeroknow likes this.

    Aeroknow Well-Known Member

    I found 1.7-1.8 ish to work great for me, around 20 yrs ago. It's what 1/2 strength floraseries is/was.
    It's the set it and forget it number(work my way up to it of course) that still works fantastic with most every strain I grow, and in many many dif setups. The exception being soil.

    Sativied Well-Known Member

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