Search  for anything...

Organic Kelp Fertilizer by GS Plant Foods - Omri Listed(1 Gallon) - Liquid Kelp Concentrate for Gardens, Lawns & Soil Yields 800+ gallons

  • Based on 3,163 reviews
Condition: New
Checking for product changes

Buy Now, Pay Later


As low as $9 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

Eligible for Return, Refund or Replacement within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Sunday, Nov 10
Order within 20 hours and 44 minutes
Available payment plans shown during checkout

Size: 1 Gallon


Features

  • OMRI ORGANIC LISTED SEAWEED & KELP FERTILIZER: Liquid Kelp is a natural plant food that provides a range of benefits for plant health and nutrition. OMRI listed for organic use, GS Plant Foods Liquid Seaweed Fertilizer is a completely natural, seaweed extract fertilizer for plants. Our liquid seaweed will optimize soil conditions for greater root mass and improve nutrient uptake. It can be applied without concern for harmful chemicals or nutrient loss to the environment.
  • ONE OF NATURES MIRACLE PLANT FOODS: Made from the finest seaweed plant Ascophyllum Nodosum, this is one of natures miracle plant foods. Our seaweed extract improves your plants tolerance to excessive heat, wind, drought conditions and more. It increases and stabilizes chlorophyll in plants, which results in darker green leaves and increased sugar content in plants.
  • IMPROVES OVERALL PLANT NUTRITION AT HOME OR COMMERCIALLY: GS Plant Foods sea kelp fertilizer is used extensively on a commercial basis, as well as at home for gardeners as an organic soil conditioner. Using GS Plant Foods seaweed plant fertilizer will lead to improved nutrient uptake and general plant wellbeing.
  • EASY TO APPLY FOR NATURAL GREAT RESULTS: Apply liquid kelp to improve growing conditions in all growth stages. To use, simply mix 2 ounces of this liquid fertilizer concentrate organic into a gallon of water and apply. Each gallon of this mixture will then cover as much as 1,000 sq ft. Any sprayer will work, but for large areas, the hose end sprayer is easiest! This liquid kelp should be sprayed in the morning or late afternoon when temperatures are lower, and the leaves stoma are open.
  • TRUSTED & RELIABLE: At GS Plant Foods, we understand that you are placing your trust in us to provide you with the highest quality organic seaweed fertilizer products available. We have 100% confidence in the quality of our products and continuously strive to deliver the best customer experience. Our products are organic, easy to use, cost efficient, sustainable, and yield consistent & amazing results in your garden, no matter what you're growing or what medium in which your plants are growing.

Brand: GS Plant Foods


Item Weight: 128 Ounces


Item Form: Liquid


Coverage: Medium


Liquid Volume: 3.6 Liters


Brand: GS Plant Foods


Item Weight: 128 Ounces


Item Form: Liquid


Coverage: Medium


Liquid Volume: 3.6 Liters


Specific Uses For Product: Lawns,Organic,Plant Food


Product Dimensions: 7 x 4 x 11 inches


Item Weight: 8 pounds


Country of Origin: USA


Item model number: LK1gallon


Is Discontinued By Manufacturer: No


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Nov 10

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Works amazingly
Size: 1 Gallon
I was encouraged by the reviews I read before purchasing the product. I must note one of the advantages is its being a liquid already and mixing well for use in a sprayer. I found that it has no scent that I could tell. It works amazingly well. I had a rapid growth out of my plants in a week or less less after using it the first time. It does last a very long time because you only use about an ounce to the gallon. I want to say this is made the most significant improvement in my plants and garden vegetables that I have seen using any fertilizer. I love the fact that it won’t burn the plants and is a huge advantage over other fertilizers I’ve used on my plants. And not being a corrosive chemical that causes other problems on your equipment. All the way around this exceeded my expectations and will continue to use it extensively. Really just couldn’t be happier with the product. It’s getting to be winter here and I stop using it when the leaves turn gray brown or fell off. I’ll continue to use it on any of the plants that have green leaves and will likely do some experiments to show the difference of with and without, but it is noticeable. Cost wise very affordable, ease of use is great. Long lasting as the gallon goes along way. Delighted I found it. Will be buying more. ... show more
Reviewed in the United States on November 2, 2022 by JDoss

  • Really work. Amazing!!!
I use for a grafted orange mandarin tree. the photo speaks for itself
Reviewed in the United States on March 4, 2024 by Maria J. Miralles Maria J. Miralles

  • Great fertilizer
Size: 1 Gallon
This product is great for all our fertilizer needs. Acts quickly, turns yellow leaves into green growth. Be sure to dilute as instructed and you will be surprised. A product we have been using for years.
Reviewed in the United States on December 31, 2023 by Danson G. Tolman

  • Liquid Kelp Organic Seaweed Extract 1 Gallon Fertilizer Concentrate
I received this Liquid Kelp organic seaweed extract fertilizer concentrate recently, I am happy with the performance of this product so far, have only used one application to all my potted plants, my flowers were all bright and perky looking and got some nice compliments on how pretty and bright they were from passerby's and family members, however I did notice that my flowers did not last as long as they did when they did not have any fertilizer of any kind, I am not sure if this is the result of a sudden heat wave we are having in spring this year after having a very cold winter, I shall update this review later if things change. This part of the review is concerning the opening of the gallon bottle, they have this inner seal, that I am unhappy with and wish that it was not included, although I know it was to protect from any product leakage during transit to my home, the problem was while struggling to open and remove this inner plastic seal, it did not provide a tab or something easy to grip on to and make it easy to pull out of opening in the neck of the bottle, when it did finally come loose from its grip in the top of the bottle, I believe it created a small vacuum and pulled the liquid to the surface and out the bottle and all over the surface and me, what a mess I had to clean up, this was not due to how I pulled out the seal, I do believe it was created by this little cup shaped seal that caused this problem, other companies seal their bottles with a tin foil or plastic seal like film, this company used a plastic cup shaped material for its seal, and although it did not create a foul smelling scent after it splashed on me and the surface I placed it on, it did stain very badly where you need to wear very old clothes while opening this product. They did seal this bottle with extra sealing however while it was in transit to my home that I was thankful for. I would of liked to give this product a five star rating but had to give it a four star rating because of this incident while opening the bottle. I am anxious to try it on other plants but have not had a chance due to very windy and hot days recently. I did notice that one green plant is thriving on this fertilizer, my plant looks greener, thicker and is spreading out more, very happy about that, but the jury is still out on my flowers. The scent that this product creates is not bad but not something you look forward to smelling either when you use an application of it the first time, once it is water in well there is no scent or a very light scent lingering in the soil if you are close enough to smell it that is and it does lure the flies a little this is natural for a fish fertilizer of course, but they do go away once the fertilizer loses more of its scent. I did notice it keeps the birds away from that area where the flowers and plants are planted, that's a plus side for me. And you have to be careful of using this fertilizer in planters that sit on concrete as it stains. Using this fertilizer is not really all that easy to use, the bottle is heavy on first use and you have to be careful not to spill this while pouring it in your garden sprayer or watering container due to heavy staining of container being used or spilling on concrete or other materials. Value of product, jury is still out on this product until a later date when I reedit this review. ... show more
Reviewed in the United States on May 11, 2020 by Darrel

  • Works Great
Size: 1 Gallon
The smell can be a little tough at first, but is soon disappears. Plants love it. My garden had a very good yield. This was my first year using it in my veggie garden. I also use it on my hemp plants. Excellent.
Reviewed in the United States on September 8, 2023 by Amazon Customer

  • Great Fertilizer
I stopped using commercial fertilizers like miracle gro to try this and really I see no need to go back. I've been using this in a foliar application with great results. I've noticed my plants to get much more healthy after using. I'll usually try to spray it on either early in the morning before the sun gets too strong or in the evening before it gets dark so that the spray has a chance to dry on. Best thing is it works well, I haven't noticed a bad smell even on the hottest most humid days and its better for my plants then the commercial fertilizers. ... show more
Reviewed in the United States on December 21, 2023 by Hobbes123

  • Feed Your Plants
I love my plants so I wanted a product that will help them thrive and grow. I love this product. You don't need to add much to your watering can and the plants just look magnificent.
Reviewed in the United States on January 18, 2024 by Michele P

  • Easy Liquid Kelp
Size: 1 Gallon
My Leland Poplars, Arbor Vitae, Juniper, and Norway Spruce all needed stress relief from a dry Spring. Liquid Kelp eas easy to apply. They look much better after just ten days. Very happy.
Reviewed in the United States on July 16, 2023 by Marc Watson

Can't find a product?

Find it on Amazon first, then paste the link below.