Organic Kelp

(31 customer reviews)


Kelp contains over 75 vitamins, minerals and micronutrients. Stimulates vigorous root development and plant growth. Increases plant tolerance to stress, frost, pests, disease and drought. Great for all stages of grow and bloom. Kelp works so well it’s why we built our entire business around it.

Not Avail in California


Product form:

Dry powder, water soluble

NPK analysis:


Product highlights:

Contains naturally occurring plant hormones and provides a balance of major and minor nutrients, enzymes, amino acids, humic acids and other organic substances. Over 80 identified elements in all.

Product designation:


Well suited for:

Hydroponics, soil and soil-less.

Product Comparison Results:

Plant Growth

With Kelp

Fruit and Flower Set

With Kelp

Primary function/use:

All-purpose growth amendment for plants and roots.

When and where to use:

All stages of plant development. Use Kelp powder to improve specific growth states. For example, to promote buds, apply kelp when plants are beginning to bud.

Use to extend shelf life of fruits and vegetables by spraying 10 days before harvest. To lengthen life of cut flowers, spray 1 to 2 days before cutting. For maximum effectiveness, apply every 4 to 7 days.

A foliar application is the most efficient and effective method. Kelp extracts are 8 to 20 times more effective when applied to the leaves then when broadcast on the soil.

For rooting and transplanting:

Mix ¼ tsp. with one (1) gallon of water. Dip roots, transplants and clones in solution before planting.

Foliar spray:

Mix ¼ tsp. with one (1) gallon of water. Spray as a fine mist until it drips off the plant surfaces.

For seedlings:

Mix ¼ tsp. with one (1) gallon of water. For seeds, soak in solution for 30 seconds.

For hydroponics:

Mix ¼ to ½ tsp. with one (1) gallon of reservoir water.


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

Additional information

Weight N/A

31 reviews for Organic Kelp

  1. Tom Winrow

    As a USDA certified Organic aquaponics farm we have to be very careful about every input on our farm. And after doing thorough research on the limited number of OMRI approved suppliers, we decided on purchasing from Kelp4Less not only because they offered the best value, but they were also very helpful on the phone. After the first run of their products (OMRI approved Humic Acid, Kelp, and Azomite) we were beyond satisfied with their products (our plants were too!) and even more impressed by their impeccable customer service. We will continue to use Kelp4less to help us and our plants grow!

  2. Dane Theisen

    A great organic amendment to garden soil. I use this Organic Kelp “Multi-Vitamin” during veg and bloom and only buy it from Kelp4Less. Who else has Kelp in their name? I use this product during all nutrient feedings. A plant that has everything it needs and more, will experience consistent growth and higher yields, than that of a unhappy hungry plant. Be a Kick-Ass caregiver and give your plants the picture perfect life-style they deserve! You’ll thank them later.

  3. barnabasedwards

    I 100% Love this soluble kelp I loved it before Kelp4Less. The quality of this product is there. The plant readiness is there. I use the entire time from start to finish on all my flowering vegetables. If you buy this product you won’t be disappointed. I’ve used these in soil and hydro it is the real deal but don’t take my word prices are so reasonable you can experiment.

  4. bentleesmom30

    This product is a must have!! Great for soil amendments and plants love it kelp is a great product and kelp4less does it right.

  5. Peter Caravella (verified owner)

    Every feeding foliar or root drench gets a dose of Soluble Kelp. Mix the night before planed use to hydrate fully. Put the soluble kelp and other powdered Aminos, Fulvic, Humic, and a dose of Yucca in the bucket with water.

    Use a stick immersion blender, be sure there is plenty of room in the bucket for foam that builds up when blending the Yucca. Gets Foamy!!

  6. Julio Webster (verified owner)

    Great product


    My plants love the rock phosphate and earth worm they say eaty eaty and request that I get them more .

  8. Anna Sy

    This is the best soluble kelp for my plants especially when my plants are a bit down with this CA heat.. I see the plants recovers after several days.. It dissolves fast., no need of warm water..Used other kelp products but it hardens after several months.. well recommended.. will order soon cuz of container gardening..

  9. EGVdave

    Love this Kelp product. I use it every year putting some in the planting hole of all my transplants. Wonderful results!

  10. Matt

    Totally satisfied. Foliar, root drench or both it works great! Mixes with other additives easily. Affordable as well. I highly recommend this Kelp4Less product

  11. Rob

    I use this product and it’s made my plants double in size. It also lasts a long time. Well worth the money.

  12. Greg Campbell

    I have been using this kelp product for several years now, for growing wheatgrass sprouts. It must be the best available as it provides exceptional results week on and week out. Could not be happier!

  13. tshirley1697

    I have seen huge improvements in my Bermuda with stress and fungus issues. It is easy to mix and spray with no clogs.

  14. A smith (verified owner)

    Amazing Product


    Fast shipping fantastic products my plants are happy!

  16. tdhoover123

    this kelp is pure kelp ,no fillers

  17. mark

    This is one of the best companys i have ever found on line very helpful employees great products always on time deliveries . I WOULD RECOMMEND THEM FOR ALL YOUR ORGANIC NEEDS .Give them a try they will make you happy .

  18. matthewwfrick

    I like using this on my lawn in the summer time to get that nice dark look without stressing the grass with top growth from fertilzer

  19. Richard Zink

    I love this stuff! It totally makes a difference you can see. And it also makes the buds taste like candy! I swear. It makes them sweet and yummy.

  20. Amanda

    I love this kelp, it works so good. It dissolves very easily. I mix the folic acid ,kelp, humic acid and iron and water everything, all my plants love it. I also love getting the buy one get one free sale

  21. Timothy Bednarchuk

    My plants LOVE it! Kelp4less always has my back for the ammendments my plants love, for so much cheaper then the name brand premixed nutrient brands. Thanks!

  22. vadim antonov

    great kelp product with just the right formulation to keep the plants happy and healthy. I would definitely buy it again

  23. Eric P

    I use on my Bermuda lawn. Seems to have helped greatly with overall health and disease tolerance! Very pleased!

  24. Gerlinde Alcorn

    It works well with Mycorrhizae or for that matter all your soluble products. My plants needed an extra kick afte our freezing spell this winter

  25. Jordon H

    Great product for seed, clone, veg and flower, all stages . Always positive results and is truly water soluble witch is not true with other brands , Kelp4less #1 in price, shipping, and product.

  26. Cathy Galeotti (verified owner)

    This kelp Product is amazing,
    Keeps plants and seedlings healthy
    Just using it alone.
    Had fantastic gardens using it.
    Literally gave me a green thumb
    No kidding.
    Ive also used the yucca extract
    In summer ,super amazing
    I had 8ft tall collard greens

  27. MIke Gorczewski

    I have a commercial garden and have used many expensive products that were cut with crap. Everything I buy from kelp for less is 100% what the product should be. I have referred many others all agree. Fantastic products great prices free shipping how could you possibly go wrong. I truly am a life time buyer thanks everyone who works there and delivers the best product yet.
    Gormans Garden
    Owner Mike

  28. Jeff W.

    Extremely soluble and great quality. Second time I purchased from kelp4less.

  29. orions_au

    This is by far been helping more than I thought it would. A side by side run of using and not using this kelp shows me that i’m goin to always use kelp from now on! Excellent.

  30. René Upshaw

    Used this product several years ago will excellent results. Ready to resume growing and using Kelp4Less products.

  31. daniel

    This stuff is the best stuff. I have been a loyal customer when it come to this or anything else kelp 4 less has to offer. All you need is teaspoon per gallon and you really see it disolve like they say it does!!!!!

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