Proper PH for Pro mix medium for growing marijuana in nursery pots

Discussion in 'Advanced Marijuana Cultivation' started by shroomyk, Aug 22, 2009.


    shroomyk Member

    Hi. I use a brand of soil less medium called: Pro Mix and i grow in nursery pots. Im wondering if my PH is idealy the right number for growing my marijuana. I mix all my nutrients an additive and supplements in a 5 gallon bucket, then adjust my PH to: 6.3 i use this PH # for veggying and in flowering. im wondering if this is the ideal PH for my soil less mix i use. Also is there 2 PH numbers for veggying and flowering, or is there just a general PH for both Any hardcore indoor growers that use Pro mix, or a soil less medium. please reply. let my know what PH is ideal. Thanks
    smoke and coke

    smoke and coke Well-Known Member

    heres a couple of charts to look at.
    fred flintstoned

    fred flintstoned Well-Known Member

    I use promix too. In veg I adjust ph to 6.0, in flower I adjust to 6 for two weeks and to 6.2 for six weeks. If you look at the charts above you'll see different nutes are available at different ph. Promix has a lot of peat which can be kinda acidic, thats why I use slightly higher ph than usually recommended. The best way to test this for yourself is test the runoff after you feed. The difference in ph will give you a good idea of the acidity of your mix. If the particular promix you use is too acidic, (they make several different mixes), you can add a touch of dolomite lime in the mix to help the balance.
    Hope this helps.

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