---
product_id: 2620934
title: "Fish Fertilizer (2-4-1) - Organic Liquid Plant Fertilizer - Fish Hydrolysate for Vegetables, Flowers, Fruit, Trees, Grass - Indoor and Outdoor Plant Food (Quart)"
brand: "neptune's harvest"
price: "¥13036"
currency: JPY
in_stock: true
reviews_count: 13
category: "Neptune's Harvest"
url: https://www.desertcart.jp/products/2620934-fish-fertilizer-2-4-1-organic-liquid-plant-fertilizer-fish
store_origin: JP
region: Japan
---

# 2-4-1 NPK ratio for balanced growth OMRI Listed organic, safe for kids & pets Cold-processed to preserve vitamins & enzymes Fish Fertilizer (2-4-1) - Organic Liquid Plant Fertilizer - Fish Hydrolysate for Vegetables, Flowers, Fruit, Trees, Grass - Indoor and Outdoor Plant Food (Quart)

**Brand:** neptune's harvest
**Price:** ¥13036
**Availability:** ✅ In Stock

## Summary

> 🌿 Unlock the ocean’s secret to thriving plants—grow smarter, not harder!

## Quick Answers

- **What is this?** Fish Fertilizer (2-4-1) - Organic Liquid Plant Fertilizer - Fish Hydrolysate for Vegetables, Flowers, Fruit, Trees, Grass - Indoor and Outdoor Plant Food (Quart) by neptune's harvest
- **How much does it cost?** ¥13036 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/2620934-fish-fertilizer-2-4-1-organic-liquid-plant-fertilizer-fish)

## Best For

- neptune's harvest enthusiasts

## Why This Product

- Trusted neptune's harvest brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Soil Health Booster:** Enhances soil structure, moisture retention, and beneficial microbes for long-term garden resilience.
- • **Beyond NPK Nutrition:** Delivers essential micronutrients, amino acids, and omega oils for richer, healthier plants and higher yields.
- • **Effortless Application:** Just 1 oz per gallon for soil drench or foliar feed—maximizes nutrient absorption with natural sticker-spreader action.
- • **Kid & Pet Friendly Organic:** OMRI certified and free from harmful chemicals—grow your garden with confidence and care.
- • **Nature’s Perfect Growth Formula:** Harnesses pure North Atlantic fish hydrolysate for unmatched nutrient density and vitality.

## Overview

Neptune’s Harvest Fish Fertilizer (2-4-1) is an organic liquid plant food made from sustainably sourced North Atlantic fish using a cold process that preserves vital nutrients. This OMRI-listed fertilizer provides a balanced NPK ratio plus micronutrients, amino acids, and enzymes to boost plant growth, soil health, and crop quality. Safe for indoor and outdoor use, it supports vegetables, flowers, trees, and lawns with easy application and eco-friendly credentials.

## Description

desertcart.com : 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) : Fertilizers : Patio, Lawn & Garden

Review: Good stuff! - My plants are doing way better. They all look so good and healthy. When mixing it stinks a little but it goes right away.
Review: Great new growth - Stinky, but good for leaf growth! It felt like I refreshed my plants in 24 hrs

## Features

- Derived for Maximum Growth: Start with nutrition designed to work with nature; Neptune’s 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 nature’s 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)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0012Q2TFA |
| Application Method | Soil Drench, Foliar Feed |
| Best Sellers Rank | #9,447 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #295 in Garden Fertilizers |
| Brand | Neptune's Harvest |
| Brand Name | Neptune's Harvest |
| Coverage | Medium |
| Customer Reviews | 4.7 out of 5 stars 3,087 Reviews |
| Global Trade Identification Number | 00081435036123 |
| Included Components | Neptune's Harvest Fish Fertilizer Quart |
| Item Form | Liquid |
| Item Type Name | Fish Fertilizer |
| Item Weight | 2.3 pounds |
| Liquid Volume | 946 ml |
| Manufacturer | Neptune's Harvest |
| Mixing Ratio | 2-4-1 |
| Model Number | HF136 |
| Number of Packs | 1 |
| Part Number | HF136 |
| Specific Uses For Product | Shade,Shade Protector |
| Target Species | Fish |
| UPC | 081435036123 190283017229 |
| Unit Count | 32 Fluid Ounces |

## Product Details

- **Brand:** Neptune's Harvest
- **Item Form:** Liquid
- **Item Weight:** 2.3 pounds
- **Liquid Volume:** 946 ml
- **Specific Uses For Product:** Shade,Shade Protector

## Images

![Fish Fertilizer (2-4-1) - Organic Liquid Plant Fertilizer - Fish Hydrolysate for Vegetables, Flowers, Fruit, Trees, Grass - Indoor and Outdoor Plant Food (Quart) - Image 1](https://m.media-amazon.com/images/I/615yS3nXd0L.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Do you know in what way this is different from neptune's harvest sw136 organic seaweed plant food?**
A: Seaweed is more of a micronutrient supplier with little fertilizer content, while the Neptunes Harvest fish fertilizer is mostly fertilizer, with quite a lot of micronutrients too. But not as much as in seaweed.

**Q: Whats the difference between buying this and buying the neptune's harvest organic hydrolized fish & seaweed fertilizer ?**
A: The npk rating is different . Just the fish has a npk of 2-4-1 where as the fish with seaweed has npk of 2-3-1 . I would think the one with seaweed would contain more mircronutrients . But both are great and made with hydrolized fish .

**Q: Best way to apply product?  Anyway to attach to a hose?**
A: For small areas use a watering can.  For larger areas dilute with about 1/4-12 water and spray with a hose end sprayer.

**Q: Would this product be too "rich", or even inappropriate for young, recently planted Red Maple trees ?**
A: I think this product is great, but with a young tree, I would use a much weaker solution than they suggest.  I am very pleased with the results, but remember, you don't want your young tree to grow too fast.  Just use 1/r-1/3 of the solution and see how it grows.  I have used this on japanese maples and it really improves the color of the leaves.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good stuff!
*by R***L on July 15, 2026*

My plants are doing way better. They all look so good and healthy. When mixing it stinks a little but it goes right away.

### ⭐⭐⭐⭐⭐ Great new growth
*by M***A on May 26, 2026*

Stinky, but good for leaf growth! It felt like I refreshed my plants in 24 hrs

### ⭐⭐⭐⭐⭐ Must have for plant lovers!
*by F***N on November 8, 2023*

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!

## Frequently Bought Together

- Neptune's Harvest Fish Fertilizer 2-4-1, 36 Ounce
- Neptune's Harvest Tomato & Veg Fertilizer 2-4-2, 36 oz
- Neptune's Harvest Seaweed Fertilizer 0-0-1 (36 Ounce)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-09-18*