Sea Minerals Fertilizer – My Favorite Fertilizer

Sea Minerals Fertilizer

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If you’re lucky enough to live right beside the ocean, I’m envious of not only your view of the surf, but the incredible fertilizer you have at your doorstep.

Sea minerals fertilizer is definitely my favorite organic fertilizer. It has very noticeably improved the health and increased the growth and yield of many of my plants.

Rivers and volcanoes have been adding minerals to the sea for hundreds of millions of years, which is why it is so nutrient dense in there.

That’s what we need to emulate in our gardens.

Fortunately these days, we all have access to it, even if we live far away from the sea…

Benefits Of Sea Minerals Fertilizer

Sea Minerals Fertilizer On Raspberries

Yes, the ocean has salt, but it also has over over 80 other minerals that are immediately available to plants upon application.

On the other hand, seaweed fertilizer and fish fertilizer and most organic fertilizers need to be worked on by microorganisms first – not a problem if you’re ensuring these microorganisms are there, but just an extra step in the process.

By the way, be sure to read the comparison to seaweed fertilizer and fish fertilizer on the right side of the page.

Dr. Maynard Murray was one of the early pioneers of using sea minerals for fertilizer. He purchased a farm and started bringing railroad cars of ocean water in to fertilize it. Sea Minerals Fertilizer On Carrots

He got bigger yields, tastier and more nutritious food, far fewer pests and just healthier plants in general.

How To Use Straight Ocean Water In The Garden

If you’re lucky enough to live near the ocean, you don’t need to go through the process of concentrating the sea water down and removing the sodium chloride.

Certainly there are benefits to that, but there’s also something to be said for walking out your door and getting some free fertilizer.

Of course you don’t want to use ocean water from a polluted bay, but if your little piece of sea is relatively clean, go for it.

As for application rate, early experiments showed that various plants would take anywhere from 1200-3000ml of sea water per square foot of soil. That’s a lot! Apparently 1 application would last for 5 years.

If I’m doing it, based on what I’ve learned, I apply more like 1 teaspoon diluted in 3 Tablespoons of water (1:10 ratio) per square foot (5000ml of ocean water per 1000 square feet), 4 times per year every year, for both foliar and soil applications.

But most of us don’t live by the ocean. Fortunately, there are a couple of companies doing a really good job of concentrating that sea water down into a liquid fertilizer while still retaining the important constituents of the water.

Finding A Quality Sea Mineral Fertilizer

Sea Minerals Fertilizer On Apples

The product I use is called Sea-Crop and I’ve been using it for many years. Thirty gallons of seawater are used to make 1 gallon of this concentrate.

There are a couple of reasons I like it more than the other ocean fertilizers I’ve tried:

  • The first is that 95% of the sodium chloride is removed. Now in my view, this isn’t as big of a deal as the manufacturer contends, as I believe the sodium and chlorine are just part of the natural balance of sea minerals, but what I do like is that have less sodium allows for a higher application rate than could otherwise be used.
  • But the bigger reason I like this product is because they do a great job of retaining the microscopic organic component of the water – the dead (and perhaps some living) microbes and plant matter. I’ve done a lot of research into the various methods of processing ocean water and usually this component is substantially decreased, especially in sea solids fertilizer such as ‘Sea Minerals FA’ and ‘Sea 90 Fertilizer’, therefore so is the effect on plants (these are still fine products and certainly useful in some cases, but I prefer the much more alive Sea-Crop).

And here’s an email from a biology student who took it upon himself to test the product:

“My name is Josh, I bought 1 gallon of Seacrop at the 2015 Tilth and promised a subjective microscopic analysis. For the procedure, I filled mason jars 3/4 with deionized water and added the exact same weight of inoculant (containing bacteria and fungi) to each container. Subsequent additions of kelp extract and fish emulsion were identical between samples, as were temperature and oxygen components. The only perceivable discrepancy amongst samples was addition of Seacrop to only one sample. The difference in bacterial population was astounding, where the non-Seacrop sample had no bacteria and the sample with Seacrop was exploding with a diverse range of beneficial bacteria. Good job on a great product that works better than I could have imagined!”
– Joshua Peterson, Entomological Aide and Biocontrol Technician, Wenatchee Valley College

How To Use Sea Crop In The Garden

It’s more expensive than liquid kelp and fish, but the application rate is only 1/3 quart per 1000 square feet annually (up to 2/3 quart for orchards), so it doesn’t end up costing much more.

I use 1/3 cup of sea minerals fertilizer per 1000 square feet (or 2/3 cup for orchards), every other month, alternating with liquid fish fertilizer (eg. fish in March, sea minerals in April, fish in May, etc.).

So for me 1 quart will do 1000 square feet for 3 years, and 1 gallon will do 4000 square feet for 3 years.

Mix it with at least 50 times as much water, which is 1/3 cup (5 Tbsp) per gallon of water.

Sea minerals is great mixed with liquid seaweed and molasses/dextrose. It also goes well with EM, compost tea and mycorrhizal fungi. The manufacturer of this sea minerals says it’s best not to apply it in the same spray as liquid fish in order to keep its effectiveness optimal – I’m not sure how big of an issue that is, but it’s one reason I started alternating them every other month.

To soak your seeds for 4-12 hours before planting, you can mix it with 100 times as much water, which is 1/2 teaspoon per cup of water. I also often mix with liquid seaweed when I do this.

Free $25 Bonus When You Buy Today

When you buy this sea minerals fertilizer, you get enrolled into my online Biostimulants course.

The course includes 10 videos totaling about 75 minutes where I chat about seaweed, fish, sea minerals, molasses/dextrose, rock dust, and how to use them all.

Important Info

I go into more detail about ordering on the main page, but here are a few quick things I’d like to mention:

  • If you have a question about this product, leave it in the comment section at the bottom of of this page and I'll try to respond within a few hours.
  • Shipping is $15 if your order is less than $50, $20 if your order is $50-$100, and $25 if your order is more than $100 (AK and HI add $10)
  • Dry fertilizers and compost tea brewers ship for free, separately with USPS instead of UPS, so they will arrive on their own maybe a day or 2 apart from my other products.
  • I ship in the U.S. only. Products ordered by 2pm will ship same day. After that they ship next day. Weekend orders ship Monday.
  • All of my products have a 1 year 100% money-back guarantee.
  • With every order, I send $1 to Organics 4 Orphans and other similar organizations. O4O is working with the world’s poor to help them grow organic, highly nutritious, highly medicinal food for themselves, and then use the surplus food to generate income for themselves as well as feeding the orphans in their communities. My hope this year is to send $1500US, which is enough to start projects in 25 new communities!

Order Now!

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Business Seals In summary, this sea minerals fertilizer:

  • Is my favorite fertilizer, often producing very impressive increases in growth and yield, not to mention plant health.
  • Is made by concentrating clean ocean water 30 times, removing most of the sodium chloride, keeping the other remaining 80+ elements along with the beneficial organic component.
  • Is organic, OMRI-Listed and the most sustainable fertilizer I know of.

As a free bonus when you order today, I’ll also enroll you in my online Biostimulants course.

Just choose your container size and click ‘Add To Cart’ up above!

37 Comments

  1. Brian Michael Shea on April 1, 2014 at 4:24 am

    I DO live by the ocean, 8 blocks away actually, and I live right off a canal connected to the ocean, so I have great access to both ocean water and seaweed. So, if I were to use the sea water, you said 1 teaspoon per square foot, so does the sea water get diluted? I also asked this before, but doesn’t the salt harm the plants?

    • Phil on April 1, 2014 at 1:36 pm

      Yes, I would dilute it with 10 parts water. You’d think the salt would harm the plants, but it generally doesn’t. There may be certain plants that are especially susceptible to salt damage, but they probably wouldn’t be doing very well 8 blocks from the ocean anyway.

      • Brian Michael Shea on April 1, 2014 at 4:08 pm

        Thanks Phil. I’m going to try it today. Oh darn, I have to go to the beach…… 😉

        • James on January 5, 2016 at 1:35 am

          2 years later. What has been the result of your experiment?

          • Brian Michael Shea on January 5, 2016 at 5:50 pm

            i honestly don’t remember where i used it, if it was on the beds in the courtyard, it worked great, on my veggie plot, so so. i’ve used more seaweed actually. i think my veggie plot needed to get more organic matter and build fertility, and seems to be getting better, whereas the soil in my courtyard was already pretty good.



  2. Bear on April 30, 2014 at 5:24 pm

    My Gilmore hose-end sprayer is set on 1 tbs per gallon when I spray a molasses/liquid seaweed/BioAg mixture for my 1000 square foot growing area. Could I add some sea minerals to this mixture and, if so, how much? Thanks.

    • Phil on April 30, 2014 at 7:03 pm

      Sure, I use 1/3 cup per 1000 square feet every month or two. That dilution rate is plenty, so you’re good to go.

      • Bear on April 30, 2014 at 9:55 pm

        Thanks! I’ll order some of your sea minerals today. Also, FYI, the video at the end of this academy lesson doesn’t work (“YouTube Remineralization”). The message I get when I select it is: “This video does not exist.” Thank you again for your academy and your willingness to answer questions. Our neighbors are beginning to ask questions like, “Okay. What are you doing differently?” So people are noticing an improvement around here.

        • Phil on May 1, 2014 at 11:14 am

          Excellent!

  3. Terri Hamilton on May 25, 2014 at 11:18 pm

    Does this product contain iron?

    • Phil on May 26, 2014 at 12:05 pm

      Yes, it contains trace amounts of iron and every other mineral, but not too much of anything. For iron, it’s 15 parts per million.

  4. James Rose on July 28, 2014 at 1:26 am

    this is absolutely staggering

  5. racheloceangrown on July 28, 2014 at 7:34 pm

    I work for the company oceangrown, Inc. And think you’d benefit more from our products please check us out at oceansolution.com and look us up on youtube! Like us on Facebook as well!

  6. Vijayan Muthu on August 3, 2014 at 2:00 am

    Hi Phil, I am VIJAY from Malaysia. I do practice using beneficial microbs in my garden. By using sea water 1:10 does it harms the mychorriza networke, trichoderma, paecilomyces lilacinus and I do all so use becillus subtilis, pseudomonas fluorescens and many other microbs .

    • Phil on August 3, 2014 at 7:35 pm

      As long as you don’t use too much, it will be fine. I even combine sea minerals with my inoculants sometimes.

      • Vijayan Muthu on August 4, 2014 at 3:13 pm

        Tq Phil.

  7. marko on October 30, 2014 at 8:18 pm

    Do I need other fertilizer with sea crop, or is the sea crop everything that I need for my garden? Thanks

    • Phil on October 31, 2014 at 7:16 am

      Fertilizing is a bit more complicated than that, but what I can say is that sea crop is the only fertilizer you need for supplying micronutrients. For macronutrients, you may need some specific minerals such as calcium and phosphorus, which can only be discovered by sending a soil test to a good soil lab to see what you have.

  8. Nelson on April 24, 2015 at 4:01 pm

    Hi Phil, I am Nelson from Malaysia. Out of curiosity, some suppliers said that this brand and most sea minerals fertilisers are just water mixed with nitrate (synthetic), is it correct? Additionally, I tried to google abt the minerals analysis for Sea Crop, but I couldn’t locate any yet… If you have, mind to share the content here?? 🙂

    • Phil on April 24, 2015 at 6:26 pm

      Hi Nelson, the few sea mineral products I know of (including this one) are some form of concentrated sea water with nothing else added at all. This one here is even registered organic, so no synthetic nitrates for sure.I have seen an analysis of Sea Crop somewhere before, but no, I don’t have it right now. I’ll let you know if I ever find it.

      • Nelson on April 25, 2015 at 9:43 am

        Thanks for your explanation Phil :)Recently this supplier has approached me with Liquid Ionic Concentrated Mineral Fertilizing Water, what he mentioned is this is derived from the ocean water too from Arabian Ocean, and he is using membrane filtration and some unique method to extract the minerals in which is different with the method used by Sea Crop/ Ocean Trace, SEA-90 if I am not mistaken.Phil, since you are an expert in farming, what’s your comment on above? 🙂

        • Phil on April 25, 2015 at 12:54 pm

          Sorry Nelson, I’ve never heard of that product and can’t find any information on it online.

          • Nelson on April 26, 2015 at 5:24 pm

            That’s what I thought. I couldn’t find anything when i googled that. Thanks Phil! Appreciate your help



  9. MendR on July 24, 2015 at 2:51 am

    Hi, I’m on ocean in Fla. Do I just dive down and get a bucket full of seawater? Heard it wasn’t concentrated enough. What do you think? I’m very new to all of this, but very interested. Please advise Thanks.

    • Phil on July 25, 2015 at 6:24 pm

      Yes, I use 5 quarts per 1000 square feet, mixed in 10-15 gallons of water and watered onto plants and soil. It’s not nearly as concentrated as the sea mineral fertilizer products available, but it’s still full of minerals (which you can taste when you go swimming).

      • MendR on July 26, 2015 at 5:30 pm

        Phil: How often should I treat w/sea salt? Once a month? year? Also, should I skim the top of the ocean water, or jump from boat, in and go a few feet under to harvest? Thanks for responding.

        • Phil on July 28, 2015 at 4:08 pm

          I do it 4 times per year. Skimming off the top of the ocean is perfectly fine.

  10. Richard on March 28, 2016 at 3:05 pm

    After you dilute the sea water how do you apply it? I assume I would be applying to my plants?

    • Phil on March 28, 2016 at 10:34 pm

      Yes, you can dilute it in a standalone sprayer (like a backpack sprayer) or use a hose-end sprayer (which then does the diluting for you) to spray it onto your plant leaves – and the soil as well.

  11. BeN on April 18, 2016 at 10:46 am

    I have been given some dead sea mud, is it beneficial as a fertilizer?

    • Phil on April 19, 2016 at 4:16 pm

      Hmm, I’m not sure Ben. Do you have an analysis of what it’s comprised of? And any kind of mineral analysis?

  12. BeN on April 20, 2016 at 6:02 pm

    For comparison, below is a typical sea water analysis:Magnesium 0.13%Sodium 1.07%Calcium 0.04%Potassium 0.04%Chlorides 1.9%Bromides 0.007%

  13. Richard on May 24, 2016 at 4:09 pm

    I am a bit confused, I wrote to you yesterday about settings when applying ocean water using the Gimour hose end sprayer to a 250 Sq Ft garden. Your response was ” Setting 10 is 10 Tbsp per gallon, which is a 1 to 25 ratio, so that’s plenty diluted”. How much undiluted sea water am I supposed to put in the hose end sprayer and then apply using setting 10? Thanks, sorry for the confusion

    • Phil on May 25, 2016 at 8:01 pm

      The research has been all over the map about how much to apply, but I’ve settled on applying less ocean water, sprayed more often, in order to avoid applying too much at once.I do 5 liters per 1000 square feet 4 times per year, which would be 1250ml per 250 square feet, or exactly 1/3 gallon of ocean water. So ya, you’d have to make a few passes with the little Gilmour. As for the dilution rate, setting 10 is the highest setting the Gilmour does, which is perhaps unnecessarily dilute, but that’s fine.Alternatively, to speed things up, you can use a watering can, and a 1:10 ratio is fine, which is 375ml (1.5 cups) per gallon of water. So that’s 3.3 gallons of water for your 1/3 gallon of ocean water. Hope that helps.

  14. lindasunderlin on July 28, 2016 at 10:24 pm

    I have two young apple trees and my raspberries that are yellow and not doing well. I have addediron and magnesium and it last a short while and then they are yellow again. How much sea crop would you give a 6-7 foot apple tree and raspberry plants that are in a row? Thanks

    • Phil on July 31, 2016 at 2:45 pm

      I generally think in terms of square footage: 1/3 cup per 1000 square feet, 4 times a year. Twice as much for fruit trees.RASPBERRIES:If the raspberry patch is 3 feet by 50 feet, that’s 150 square feet. At 1/3 cup per 1000 square feet, that’s a little less than 1 Tbsp for the raspberries – 4 times a year.TREES:Here’s what the sea minerals product developer says for trees:Medium size trees (size 3-6 feet): use 4 oz. SEA-CROP® seawater concentrate per tree, not to exceed 10 gallons per acre per year.Large trees (size 6-12 feet): use 6 oz of SEA-CROP® concentrate per tree, not to exceed 10 gallons per acre per year….Depending on tree size, I would use 1-1.5 oz (2-3 Tbsp) per tree – 4 times a year.

      • lindasunderlin on August 1, 2016 at 5:46 pm

        Thank you. I will give it a try.

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