1. Grasscity.com August contest: Subscribe to our channel on YouTube to be entered to win a PAX 2 Vaporizer! Winner will be announced Sept 1st
    Dismiss Notice

Organic Sulfur Sources?

Discussion in 'Organic Growing' started by CommanderInReef, Feb 22, 2011.

  1. #1 CommanderInReef, Feb 22, 2011
    Last edited by a moderator: Feb 22, 2011
    My mothers appear to be becoming P and Sulfur deficient. I'm wonder what organic sources there are out there. I believe you can use mushroom compost, but don't know if that varies by what the mushroom compost is actually made from. Does anyone know of any 100% organic sources out there? I'm borderline ready to just use some Mother Plant chem nutes on them just to make sure they don't get worse. Please save me from this evil abominable thought.
  2. Howdy Commander,

    Check out K-MAG for your sulfur concerns. It is also a great source of soluble magnesium and potassium. Good stuff all the way around.


  3. #3 CommanderInReef, Feb 22, 2011
    Last edited by a moderator: Feb 22, 2011
    Sees like 22% is really high sulfur content. Shouldn't I be using something along the lines of 2-3%?

    ...also where would one even purchase the stuff? Do you have to buy direct?
  4. K-Mag is also marketed as Sul-Po-Mag and is found at garden centers or even on Amazon. sul po mag

    If you're concerned and want some more subtle sulfur ideas, either Epsom Salts (magnesium sulfate) at 13% sulfur or Gypsum (calcium sulfate) at 17-20% sulfur.

    In my experience, the K-mag is my hands down favorite.


  5. Thank you for your prompt help and awesome quality information!
  6. What kind of a top dress application rate or foliar application rate would you suggest with this product? The moms are in #2 Smart Posts. ...just seems like it would be easy to overdo it and hinder my Cal uptake.
  7. CommanderInReef

    1 tablespoon in 1 gallon of water is an uber safe application rate. This mineral (which looks like rock salt) is soluble - mostly. Shake the jug every time you walk by it and in a day or so you'll be able to spray your plants or apply to the soil. A cheap (like under $10.00) air pump from China Mart and a $.75 airstone will have you ready to go in 10 hours or so. Starting out with boiling water is helpful as well.

    Anyway on to your question about the levels of Mg, K and S............

    From the Sul-Po-Mag web site is a good explanation on the percentages of the components in this mineral product.

  8. Thank you LD. Always appreciated!
  9. LD

    Would it be AOK to also add NH Liquid Fish to the K-Mag? No adverse effect? Also should the K-Mag be pH'd, or left alone and just used as is?

    Another off question...what do you pH your soil drench at vs. your foliar? Both at 6.5? Foliar a higher pH?

    Also, to be trying to correct a Phosphorus deficiency, where should my dirt pH be?

    ...I really wish I had someone local that could teach me how to read leaves better...

    Sorry for the barrage of questions.

  10. #10 FormerLumperDaw, Feb 23, 2011
    Last edited by a moderator: Feb 23, 2011

    K-Mag (Sul-Po-Mag, Langbeinite, sulphate of potash - pick your name!) cannot and will not have any effect on your soil's pH - looking at the components in this mineral will explain that easily. Of the 2 components, Magnesium & Potassium are base alkalis (meaning that they can accept hydrogen ions). And remember it's Hydrogen (H) that is the 'H' in pH.

    Sulphur when broken down by the soil's microbe colonies releases a carbonic gas (2 Oxygen atoms bound with a single Carbon atom) as well as Hydrogen (H) which can, if needed, be used by the soil's microbes to raise the pH in the rhizosphere.

    As far as pH goes I've never tested anything for the pH other than when fermenting plant material (FPE or BIM). My experience has been that a soil, using solid ingredients will negate the need for monitoring pH.

    One of the problems with testing a soil on an ongoing basis is that bacteria colonies and fungi colonies prefer different pH levels which are adjusted by the exchange of cations that are directly affected by the elements being freed from bonds (like the Carbon (C) and Oxygen (O) components in Calcium Carbonate). You could test your soil in the morning and find that the pH is elevated and without you doing anything you might find a far lower reading in the evening. This has to do with the relationship(s) between the fungi vs. bacteria colonies. When the bacteria colonies explode like when you apply a food that they love like alfalfa tea or (God forbid I'm typing this) molasses - then the fungi take over and begin to devour the weaker bacteria colonies which causes the drop in the pH.

    If you feel that you're having major pH issues then I would be looking at my water source. Water quality ranges across the board in the US. The standards are fairly minimal and not too helpful for people growing plants in containers. To say the least.


  11. CommanderInReef

    Applying a combination of chelated minerals in a viable humic and fulvic source will do wonders for your soil's pH.

    A product that I use and some others here at GC is BioAg TM-7 and the TM is for Trace Minerals and 7 being the number of specific micro nutrients it contains.

    Apply 1x per week - religiously - and you'll be able to retire your pH pen once you get your water source dialed in.

  12. The past two waterings I have used RO water. I just also ordered myself a really nice Growonix GX300 system that will be installed soon and will be my new source of water rather than bubbled city water. The plants seem a little healthier looking in their new growth. Still waiting for the Sul-Po-Mag to show up.

    Today they got some Bio-Biz Root Juice, Cal-Mag Plus, Neptunes Harvest Liquid Fish and ThriveAlive Green. pH'd in today at 6.3 and came out at 6.8. So my soil pH seems to still be high. Hopefully the NH Liquid Fish will help with what could be a P deficiency ...it's numbers are 2-4-1 + Thrive Alive Green 1-1-1.

    Could I successfully use a combo of the following two products as a replacement for BioAg TM-7? Would it essentially be the same thing. What I have been using currently is Root Juice from Bio-Bizz (Kelp & 2.2% Humic Acid - 0.1-0-0.1)

    Fulvic Acid
    Fulvic Acid Concentrate

    Humic Acid
    Humic Acid
  13. OK, I've been doing some reading here about BioAg TM-7 and VAM & Activator...now that I have a better understanding of what some of these things are, I'm impressed. Do you just buy direct from them and what products do you use from them for what purposes?

    Sorry for the barrage of questions. I know you're a plethora of information on these things, and I a sponge...extra absorbent. I live for organics now that I've dove in head first.
  14. CommanderInReef

    You can buy direct from them and the prices reflect your landed cost, i.e. no S & H charges.

    Having said that, the national company which control a great deal of the indoor garden centers (National Garden Wholesale - a division of SunLight Mfg. and in some kind of unholy alliance with HydroFarms and someone else) - at any rate BioAg cut an incredible deal for distribution to their clients, i.e. the local indoor garden store.

    I can actually buy it cheaper at the local grow store than I can ordering it direct. And that's BEFORE the usual, unimportant and obligatory 'Good Bro Discount' afforded to anyone that can walk and mumble at the same time.

    In one of the cannabis grow magazines, Maximum Yield, one of the scientists at BioAg penned an article on how to consider which humic acid product to buy - "The Real Dirt on Humic Substances"

    You'll probably find it an interesting read.


  15. That's some funny shit there LD.....LMFAO!.......good article also, I have it in print.


Share This Page