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Neptune's Harvest Fish & Seaweed Blend 2-3-1

Regular price $20.00
Unit price

Neptune's Harvest Organic Fertilizers

OMRI Listed

NOW WITH FREE SHIPPING!!! (Excludes 55 Gallon and 275 Gallon Drums)

Neptune's Harvest Organic Fish & Seaweed Blend 2-3-1 organic fertilizer is an combines the benefits of fresh fish and the deep north cold water seaweed Ascophyllum Nodosum.  Neptune's Harvest fish/seaweed blend contains vitamins, amino acids, enzymes, and natural plant growth hormones (phytohormones) from the seaweed.  It also contains the micro and macro nutrients naturally found in fish.  The nitrogen and other nutrients are already chelated, so they are readily available for plant consumption.  Unlike fish emulsions, Neptune’s Harvest retains the fish proteins and oils.

The Seaweed in Neptune's Harvest Fish / Seaweed Blend is an organic storehouse of over 60 naturally occurring major and minor nutrients and amino acids. This blend of fish and seaweed contains growth promoting substances that enhance plant development, color and vigor and have also been found to increase plant hardiness and resistance to adverse environmental conditions; such as early frost, extreme heat and lack of moisture.


  • University studies have shown Neptune’s Harvest to outperform 20-20-20 fertilizers.
  • Increased marketable yields for fruits and vegetables.
  • Improved shelf life on fruits and vegetables.
  • Increase in Plants natural sugar.
  • Stronger and more colorful flowers and foliage.
  • More plentiful, fragrant, and longer lasting blooms.
  • OMRI-Listed.  Meets the requirements of the National Organic Program (NOP) for use in organic production.
  • Multiple record giant pumpkins using Neptune's Harvest Fertilizer - striking results and organically!

  • Pure North Atlantic Hydrolyzed Fish.
  • Pure North Atlantic Seaweed (Ascophyllum nodosum).

Shake well before using. Prepare for one application only. Do not store diluted fertilizer.

Larger Application to Plants, Turf or Trees: Add 6 ounces per 1,000 square feet, diluted in no more concentrated than 12.5 ounces per gallon of water.  A typical rate would be 12 ounces per 2 gallons of water sprayed evenly per 1,000 square feet.  
House Plants:
 1 Tablespoon per Gallon of water.  Feed every 2-3 weeks.  Water lightly so that diluted fertilizer does not remain in drip dish.
Outdoor Plants: 1/8 Cup per Gallon of water.  Feed vegetables, flowers, trees, and shrubs, every 2-3 weeks. Apply generously to soil or as a foliar spray, until leaves are wet, top and bottom.  It is best to foliar feed early or late in the day.
Compost Enhancer: 1/4 Cup per Gallon of water every 2-3 weeks.
Seed Germination: Soak in a solution of 1 teaspoon per cup of water.

  • 1 Pint (Covers 2,723 square feet).
  • 1 Quart (Covers 5,445 square feet).
  • 1 Gallon (Covers 1/2 acre or 21,780 sq. ft.).
  • 5 Gallon (Covers 2.5 acres).
  • 55 Gallon Drum (Covers 27.5 acres)*
  • 275 Gallon Tote (Covers 137.5 acres)*

    CLICK HERE for more information on professional wholesale pricing or for bulk purchases, including for 55 Gallon Drums and 275 Gallon Tote Sizes







Our sister company, Green Earth Ag & Turf, brings a decade of experience as the U.S. leader in providing Professional Landscapers, Farmers and Indoor Growers like you the best in organic products for higher yields, aesthetics and profits!  Discounted professional or wholesale prices can be found there.

to quickly and easily open a wholesale account with us or to get bulk and professional pricing. 

You can also contact us directly at (866) 374-5101 or for the top technical and customer service in the industry.  

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Customer Reviews

Based on 3 reviews
Jorge Rufo

Ordered Neptune's Harvest fish and seaweed blend from Received my order within the promised time and will definitely order more products from them in the near future.

Happy gardener
Makes a huge difference!

I've been giving my echinacea 'Cheyenne Spirit' borders a weekly foliar feed. The colors this season are so much more vibrant and the plants seem happier. It's a keeper!

Papper B.
My favorite fertilizer

I use Neptune's fertilizer in my garden and my houseplants. I love that I stumbled upon Grow It Naturally. I will definitely continue to purchase from here and support local businesses. Thanks yall.