K Mag

Rated 5.00 out of 5 based on 4 customer ratings
(4 customer reviews)


Product Documents


Not Available in California

Product Description

Solution Grade MAGNESIUM POTASH and SULFUR Powder. Also known as KMAG SUL-PO-MAG and KMS. 22% Potassium with 11% Magnesium 22% SULFUR in a solution grade powder.

Perfect for adding Magnesium Potassium and sulfur to growing plants in any growing application.

Product form:

Dry powder

NPK analysis:


Directions For Use

As a soil applied fertilizer or nutrient:

Dissolve 2-4 dry ounces in 1 gallon of water. Coverage is 100 – 500 sq. ft.

As a folier application:

dissolve 1 dry ounce in 1 gallon of water.

All items are shipped using USPS Priority Mail, unless otherwise requested and arranged by the customer, prior to order completion.Free Shipping

All orders ship within 48 hours of order confirmation and as always FREE SHIPPING in the USA. After successfully placing an order from Kelp4less.com you will receive an order confirmation email with the details of your order to the email address provided.

Once your order has shipped you will be emailed specific tracking information.

To check the status of an order please visit our “View Order” page.

Gift Cards are electronically delivered to your email address.

State of Idaho is not an option for shipping any of our products. If you are in the State of Idaho, please contact us direct.

Kelp4less Disclaimer

While Kelp4less has made every effort to ensure accuracy of information on its website and labels, Kelp4less assumes no responsibility or liability for the use and results of any of it’s products.

The purchaser and the end user of Kelp4less products assumes sole responsibility and liability for product use, results and disposal. Kelp4less makes no guarantees either express or implied.

4 reviews for K Mag

  1. Avatar
    Rated 5 out of 5


    Ah K-Mag – where have you been all this time? Never heard of this kind of mix before, and I find it very useful as a preventative measure against deficiencies that *might* occur. I’ve only used it at the strength mentioned in the mixing instructions. I’ve applied it on both mature and (very) young plants. The clones are sprayed at 2 weeks and the flowering plants are sprayed within the first two weeks of induction, while their metabolism is changing. These applications help prevent mag / sulfur deficiency, and I swear the clones look better even 24 hours after application. My only gripe – I wish calcium was thrown in this product, but I use their limestone powder as a top dressing instead.

  2. Avatar
    Rated 5 out of 5

    hydrorod (verified owner)

    Great Stuff, really helps give that extra boost to my flowers Very impessive blend used either as a drench or spray for high performance maintenance during all growth stages but mainly during 3-5 week works for me.

  3. Avatar
    Rated 5 out of 5


    Solid product .. been using it for a year now. Real nice shot of potassium, magnesium and sulfur. Gone up to 5 TBS per gallon once per week in flower with no ill effects.

  4. Avatar
    Rated 5 out of 5


    I may have made a mistake ordering what wanted to order was calcium magnesium. I am going to start using it anyway and see what will happen
    But I believe in Kelp4less great people and product

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