Calcium Magnesium Plus

Rated 5.00 out of 5 based on 7 customer ratings
(7 customer reviews)


Why Use It?

Supports peak production and plant development by providing essential and available Calcium and Magnesium supplement to any nutrient regimen.

Product Documents

Not Available in California

Product Description


Product form:

Dry granules and flakes

Water soluble

NPK analysis:


Primary function/use:

A good source of the key essential nutrients for plant life – calcium and magnesium.

Product designation:


Product highlights:

High in beneficial calcium, magnesium, iron and trace minerals. This product meets or exceeds all other Cal Mag products on the market. No need to pay for water.

Well suited for:

Hydroponics, soil and soil-less.

Directions For Use

How to mix:

Mix 1/2 tsp. with one (1) gallon of reservoir water.


Be sure to shake well when making a liquid solution.

When and where to use:

Use product through the grow and bloom stages. Feed weekly. Apply as a root drench. For best results avoid foliar spray.


Ensure bag is properly sealed and stored in cool, dry, dark place.

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 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.

7 reviews for Calcium Magnesium Plus

  1. Avatar
    Rated 5 out of 5

    Gina (verified owner)

    Use this product with my grow and bloom packs . Mixes easy and easy to use, great supplement for tomatoes to avoid tomato end rot.

  2. Avatar
    Rated 5 out of 5

    Mark Bohrer

    Excellent soluble product . I use this product during all phases of growing and bloom . Excellent for using in your own tea. Comes packaged nice and secure and with great instructions .

  3. Avatar
    Rated 5 out of 5

    John Humble (verified owner)

    Awesome product, I use it along with the grow pack and bloom pack with amazing results.

  4. Avatar
    Rated 5 out of 5

    Jay Tee (verified owner)

    The Organic Mechanic has helped me very much with his products and videos. Cal mag+ is an essential supplement for ALL hydroponic gardeners. As he says EVERYONE has water and with Cal mag+ you can make an almost unlimited supply of what is needed to get any hydroponic grow off to a healthy start. Watch his humic acid videos as well as the other supplements and you will see a great improvement in your hydroponic gardens.

  5. Avatar
    Rated 5 out of 5


    Love this stuff, also a must for indoor grower, no more deficiencies in my grows! Thank You Kelp4less!!!!!!!!!!!!!!!

  6. Avatar
    Rated 5 out of 5

    Chris (verified owner)

    Not only is this product good to give to my plants, it is necessary to treat the coco I grow in so it is absolutely essential for me. And the fact that it is a powder means I can ship enough to last me a while for a reasonable price.

  7. Avatar
    Rated 5 out of 5

    K.T. (verified owner)

    Dissolves without any issues. Plants started new growth in 48 hrs despite deficiencies. Great product.

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