Neptune's Harvest Fish Fertilizer (2-4-1) - Organic Liquid Plant Fertilizer - Fish Hydrolysate for Vegetables, Flowers, Fruit, Trees, Grass - Indoor and Outdoor Plant Food (Quart)
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Availability:
In Stock.
Arrives
Wednesday, Oct 28
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At a glance
- Condition
- New
- Size
- qt
- Style
- fertilizer
- Model
- HF136
- Weight
- 2.3 lb
- Item Form
- Liquid
- Liquid Volume
- 946 ml
- In the box
- Neptune's Harvest Fish Fertilizer Quart
Features 5
- Derived for Maximum Growth: Start with nutrition designed to work with nature; Neptunes Harvest Organic Fish Fertilizer 2-4-1 is a liquid fish fertilizer and organic fish plant food made using a unique cold process that protects the vitamins, amino acids, enzymes, and growth hormones; sourced from clean, mineral rich North Atlantic Ocean fish and never lake, farmed, or river fish; this fertilizer supports lawns, vegetables, flowers, and indoor plants throughout the growing season and is safe for kids and pets
- Power of Fish Hydrolysate: Crafted from post-fillet ocean fish using 100% of the fish, this organic plant fertilizer delivers complete nutrition in natures perfect balance; containing far more than NPK, it supplies micronutrients, trace elements, vitamins, minerals, amino acids, enzymes, and omega oils, making this plant fertilizer beneficial for everything that grows while supporting better yield, improved quality, and nutrient-dense food without the offensive odor common in fish emulsions
- How to Use: Simple and efficient across growing spaces, this liquid plant food requires only one ounce per gallon of water and works as a soil drench or foliar feed; ideal as an indoor plant fertilizer and for outdoor gardens, trees, lawns, and vegetables, this liquid fish fertilizer acts as a natural sticker and spreader, helping nutrients adhere better to plant surfaces for effective absorption
- Supports Soil Performance: This organic soil amendments solution builds organic matter, feeds beneficial bacteria and microbes, and improves soil structure over time; soil becomes looser, retains moisture, drains better, and supports healthier roots; this organic fish fertilizer is OMRI Listed, helps raise Brix levels, sequesters carbon, and may deter deer naturally, helping plants become less susceptible to insects and disease while improving long-term soil quality
- Package Contents: Neptune's Harvest 2-4-1 Fish Fertilizer - 36oz Bottle (Pack of 1)
Specs 17
| Brand | Neptune's Harvest |
|---|---|
| Item Weight | 2.3 pounds |
| Item Form | Liquid |
| Liquid Volume | 946 ml |
| Specific Uses For Product | Shade,Shade Protector |
| Model Number | HF136 |
| Global Trade Identification Number | 23 |
| Number of Packs | 1 |
| Manufacturer | Neptune's Harvest |
| UPC | 081435036123 190283017229 |
| Unit Count | 32 Fluid Ounces |
| Item Type Name | Fish Fertilizer |
| Part Number | HF136 |
| Application Method | Soil Drench, Foliar Feed |
| Coverage | Medium |
| Target Species | Fish |
| Mixing Ratio | 2-4-1 |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Wednesday, Oct 28
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Happy plants
Size: Gallon
Style: fertilizer
My plants love this fertilizer!! The initial smell isn’t great (if you’ve ever cleaned an aquarium or fish pond…that’s it) It dissipates by the next day.
Reviewed in the United States on October 11, 2026 by julie v
Great fertilizer
Size: Quart
Style: fertilizer
I love this for my house plants!
Reviewed in the United States on October 3, 2026 by Patricia Purcell
Good stuff!
Size: Pint
Style: fertilizer
My plants are doing way better. They all look so good and healthy. When mixing it stinks a little but it goes right away.
Reviewed in the United States on July 15, 2026 by Rae McDaniel
Super stinky stuff that’s worth it’s weight in gold.
Size: 5 Gallon Pail
Style: fertilizer
Make no mistake - you do not want to touch it. Haha. I’ve set this up on a timer drip system for landscaping and garden now in two different properties. It’s amazing stuff. Plants loooove it. Water early morning for just 10 minutes and within a week, plants take off. Now it’s set to water it in every 3 days. Just remember - it smells horrid - so do not plan to touch it and then not scrub yourself down (which is why ours is on an automated drip system). Have recommended it to friends and everyone has had amazing results. They have a smaller size if you want to try it out but I’m sure once you set it up so you don’t have to touch it, you’ll be hooked too. Happy gardening!
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Reviewed in the United States on July 21, 2025 by Amazon Customer
Great fertilizer
Size: Pint
Style: fertilizer
Dwarf tomatoes greened up within couple days, easy to apply, no bad smell
Reviewed in the United States on June 30, 2026 by Mike Gallo
The best
Size: Quart
Style: fertilizer
Until now I’ve never been able to grow anything. I will never run out of this.
Reviewed in the United States on June 17, 2026 by Terri S.
Must have for plant lovers!
Size: Quart
Style: fertilizer
Alright, folks, gather 'round, and let me regale you with my adventure in the world of fish poop fertilizer. Now, I'm no expert in gardening, but this stuff had me curious, and curiosity didn't just kill the cat; it fertilized it! First things first, I opened the bag, and oh boy, it hit me like a fish market on a hot summer's day. The smell? Let's just say it's not exactly the perfume of the year. But I thought, "Hey, it's fish poop; what did I expect, lavender fields?" So, you know, just be prepared to hold your nose or light a scented candle when you use this stuff. Now, here's the good part. My plants loved it! I mean, they went absolutely bananas. It was like they'd discovered the secret to plant nirvana. It's like feeding your flora a Michelin-star meal – they thrive and flourish like they're at a garden party of the century. And let's not forget the novelty factor. I mean, telling your friends you're using fish poop to fertilize your garden? Priceless. It's like gardening with a touch of bathroom humor. In conclusion, fish poop fertilizer is like a smelly, magical elixir for your plants. If you can get past the pungent aroma, your garden will thank you with lush, vibrant blooms and veggies. So, if you're ready to dive into the world of stinky horticulture, this stuff is the catch of the day. Just remember to bring your nose clips!
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Reviewed in the United States on November 8, 2023 by Fuzzyman
I have tried so many fish emulsion/seaweed fertilizers and this is the best despite the cost
Size: Gallon
Style: fertilizer
I go through about 3 gallons a season on my outdoor pot plant garden. The photo is one side of the house. There are myriad houseplants and potted garden plants like heucheras in back. This year I planted some yellow marigolds, not overly fond of them but with Neptune's they grew to enormous size. Also grew some Allegheny Hawkweed (going native!) and the difference between hawkweed in the wild and the fertilized hawkweed was astonishing.
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Reviewed in the United States on October 11, 2026 by Patty