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epsom salt ratio

Discussion in 'General Marijuana Growing' started by kieahtoka, May 14, 2007.


    kieahtoka Well-Known Member

    Hey guys I recently found that my plants have a magnesium deficiency, and I wanted to foliar feed my plants with some epsom salt and water. I don't know the ratio though

    mogie Well-Known Member

    The plants can be foliar feed at ½ teaspoon/quart of Epsom salts (first powdered and dissolved in some hot water). When mixing up soil, use 2 teaspoon dolomite lime per gallon of soil.
    If the starting water is above 200 ppm, that is pretty hard water, that will lock out mg with all of the calcium in the water. Either add a 1/4 teaspoon per gallon of epsom salts or lime (both will effectively reduce the lockout or invest into a reverse osmosis water filter.
    stoned and trying

    stoned and trying Active Member

    i have a culligan reverse osmosis tap at my sink :) is it good to use? what are the advantages?

    SHOOT2KILL66 The Gardener

    I prefair to mix with water and feed through the soil over folliar spraying

    After giving them the mg wait about a week or two before using again two much will make it worse .

    What i found that works even better was to flush out with a good organic Fert with good levels of MG. and some ph,d water also . My routine would be 1 water 1 fert and end with another water flush .. This way seemed to recover fastest

    BunOne Active Member

    i also just recently discovered a mg problem, i run a DWC setup so i added a large Tbsp of Epsom salts to roughly 6 liters of water in my res.

    how long till you see results usually?

    kcheetah Member

    Howdy Kieahtoka; kcheetah here...I did a small time experiment using Epsom salts (1 full Tsp per gallon),ph'd to 5.5 - sprayed bottom of leaves lightly(mist,not drippin).....plants popped back into
    green leaf,but I got a quicker result,mixing 1 Tbl. in a 3 gallon jug of Feeding water,Ph'd to 5.5.Be patient, I water(using Epsom salts) once a month now,with SWEET Results.Happy Thanksgiving! Try a bit
    of pure live Mycorrhizal inoculant,"The Bomb!"

    foreverflyhi Well-Known Member

    so u mix both epson salt and mycorrhizal?

    imchucky666 Well-Known Member

    1 TBSP / GAL is what I have been reading........
    I am getting some of the rust colored spotting on the older leaves on one plant, so I did 1 tsp/ 1/2 gal of water today and sprayed..... How often should I do that?

    deeeman420 Member

    Can sea salt or regular salt also be used?

    cannabineer Ursus marijanus

    No! Salt is sodium chloride ... both toxic ions.
    Epsom salt is magnesium sulfate ... both nutrient ions. cn

    cannabineer Ursus marijanus

    Be careful foliar-feeding ionics. There is a serious risk of burning the leaves. I would add the magnesium solution (I recommend one gram per liter as the dosage) to the roots. cn

    knotmyself Member

    week 7 of flower under 600 watts HPS, seeing a little yellowing on the lower leaves and a lot on one of my 4. At this stage would/Could it hurt to try Epsom salt? I keep hearing people saying they want to keep there plant green till the end but I sure do see a lot of yellowing going on towards the end of most peoples grows anyway? Thoughts? Suggestions? Thanks!

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