---
product_id: 1332115
title: "Neptune's Harvest Fish & Seaweed Fertilizer 2-3-1, 18 Ounce (36 Ounce)"
brand: "neptune's harvest"
price: "7373 kr"
currency: ISK
in_stock: true
reviews_count: 13
category: "Neptune's Harvest"
url: https://www.desertcart.is/products/1332115-neptunes-harvest-fish-and-seaweed-fertilizer-2-3-1-18
store_origin: IS
region: Iceland
---

# 2-3-1 NPK ratio for balanced growth 18 fl oz concentrated liquid formula 100% organic fish & seaweed blend Neptune's Harvest Fish & Seaweed Fertilizer 2-3-1, 18 Ounce (36 Ounce)

**Brand:** neptune's harvest
**Price:** 7373 kr
**Availability:** ✅ In Stock

## Summary

> 🌱 Grow like a pro, naturally—your garden’s secret weapon!

## Quick Answers

- **What is this?** Neptune's Harvest Fish & Seaweed Fertilizer 2-3-1, 18 Ounce (36 Ounce) by neptune's harvest
- **How much does it cost?** 7373 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/1332115-neptunes-harvest-fish-and-seaweed-fertilizer-2-3-1-18)

## 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

- • **Pure Organic Power:** Fermented fish and seaweed deliver natural nutrients without harsh chemicals
- • **Long-Lasting Blooms:** Enhances flower fragrance, color, and bloom duration for standout garden moments
- • **Versatile Application:** Easy to mix and apply by hand, sprayer, or drip line—perfect for any garden setup
- • **Trusted by Garden Pros:** Top-rated with 4.7 stars and thousands of happy plant parents worldwide
- • **Boost Your Garden’s Vibe:** Rich 2-3-1 NPK ratio fuels vibrant veggies and lush foliage

## Overview

Neptune's Harvest Fish & Seaweed Fertilizer is a premium 18-ounce liquid organic fertilizer with a balanced 2-3-1 NPK ratio. Made from fermented fish and seaweed, it promotes bigger yields, stronger plants, and longer-lasting blooms. Easy to apply via hand, sprayer, or drip line, it’s a favorite among gardeners seeking natural, effective growth solutions.

## Description

desertcart.com : Neptune's Harvest Fish & Seaweed Fertilizer 2-3-1, 18 Ounce (36 Ounce) : Fish Emulsion Organic Fertilizer : Patio, Lawn & Garden

Review: Big Yields, Beautiful Plants, Fair Price - My tomatoes and herbs love it. So do my houseplants. I love it for two reasons: One, it helps me get big vegetable yields and grow beautiful plants. Two, it's all natural. As for the price, it's fair. Not the cheapest fertilizer on the market, but it's worth every penny.
Review: Love this stuff - I think this is a great organic fertilizer that can be used throughout your garden whether your plants are in the ground, potted, or indoors for seedlings or established plants. I highly recommend it. All of my plants love it and it is not harsh on any of them. Definitely follow the instructions on the bottle. The key for me is to not water the plants right before. If it is for potted plants and depending on the size I do little by little. Then after I finish I will go back to the first one to see if it needs more. You don't want the fertilizer draining out of the bottle - you want to make sure it all stays in the soil. This is fermented fish and seaweed so the concentrate in the bottle does have a punch as expected but once it is diluted there is barely any smell or any off putting smell. That is also why I do little by little so the fertilizer does not drain down into the drip trays. I can see it making the smell stronger as it evaporates.

## Features

- Grow a beautiful vegetable garden
- Flowers and foliage will be stronger and more colorful
- Blooms will be more plentiful, fragrant and longer lasting
- Easy to mix and apply by hand, sprayer, or drip line

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000OWBUSA |
| Best Sellers Rank | #3,617 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #135 in Garden Fertilizers |
| Brand | Neptune's Harvest |
| Customer Reviews | 4.7 4.7 out of 5 stars (6,989) |
| Global Trade Identification Number | 00081435236127 |
| Is Discontinued By Manufacturer | No |
| Item Form | Liquid |
| Item Weight | 1.13 pounds |
| Item model number | FS136 |
| Liquid Volume | 18 Fluid Ounces |
| Manufacturer | Neptune's Harvest |
| Number of Items | 1 |
| Product Dimensions | 4 x 4 x 9 inches |
| Specific Uses For Product | Organic |
| UPC | 081435236127 |
| Unit Count | 36.0 Fluid Ounces |

## Product Details

- **Brand:** Neptune's Harvest
- **Item Form:** Liquid
- **Item Weight:** 1.13 Pounds
- **Liquid Volume:** 18 Fluid Ounces
- **Specific Uses For Product:** Organic

## Images

![Neptune's Harvest Fish & Seaweed Fertilizer 2-3-1, 18 Ounce (36 Ounce) - Image 1](https://m.media-amazon.com/images/I/61H2mDig-pL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Big Yields, Beautiful Plants, Fair Price
*by M***E on November 1, 2025*

My tomatoes and herbs love it. So do my houseplants. I love it for two reasons: One, it helps me get big vegetable yields and grow beautiful plants. Two, it's all natural. As for the price, it's fair. Not the cheapest fertilizer on the market, but it's worth every penny.

### ⭐⭐⭐⭐⭐ Love this stuff
*by D***D on March 25, 2024*

I think this is a great organic fertilizer that can be used throughout your garden whether your plants are in the ground, potted, or indoors for seedlings or established plants. I highly recommend it. All of my plants love it and it is not harsh on any of them. Definitely follow the instructions on the bottle. The key for me is to not water the plants right before. If it is for potted plants and depending on the size I do little by little. Then after I finish I will go back to the first one to see if it needs more. You don't want the fertilizer draining out of the bottle - you want to make sure it all stays in the soil. This is fermented fish and seaweed so the concentrate in the bottle does have a punch as expected but once it is diluted there is barely any smell or any off putting smell. That is also why I do little by little so the fertilizer does not drain down into the drip trays. I can see it making the smell stronger as it evaporates.

### ⭐⭐⭐⭐⭐ Oceanic Elixir for Earthly Abundance: The Sea's Secret to Garden Glory!
*by M***. on March 17, 2023*

Dive into the bountiful benefits of Neptune's Harvest Organic Hydrolized Fish & Seaweed Fertilizer, a 36-ounce bottle of nutrient-rich goodness that will have your plants flourishing like never before! This sea-sourced solution is packed with the finest ingredients from the ocean's depths, providing your garden with a powerful blend for optimal growth. Let's set sail on the details of this aquatic agricultural ally. Pros: Oceanic offerings: Combining the best of both worlds, this fertilizer contains hydrolized fish and seaweed, providing your plants with an array of essential nutrients for healthy growth and development. Blossom bonanza: Neptune's Harvest Organic Fertilizer promotes vigorous root systems, abundant blossoms, and increased fruit production, making your garden a veritable paradise of productivity. Eco-friendly excellence: Sustainably sourced and organic, this fertilizer ensures you're not only nourishing your plants but also doing your part for Mother Earth. Versatile vitality: Suitable for a wide range of plants, from vegetables and fruits to flowers and shrubs, this fertilizer offers oceanic goodness for all your gardening needs. Cons: Pricey potion: Some users might find the cost of this fertilizer to be on the higher side. However, the exceptional results and bountiful harvest it delivers make it a worthy investment for any dedicated gardener. Aromatic adventure: Due to its organic, nutrient-rich composition, this fertilizer may have a strong, fishy odor. But fear not, for the smell is a small price to pay for the garden splendor that awaits! In conclusion, Neptune's Harvest Organic Hydrolized Fish & Seaweed Fertilizer is the sea's secret to garden glory, providing your plants with an oceanic elixir that promotes optimal growth and abundance. Embrace the power of this aquatic agricultural ally, and watch your garden transform into a flourishing haven of earthly delights!

## Frequently Bought Together

- Neptune's Harvest Fish & Seaweed Fertilizer 2-3-1 (36 Ounce)
- Neptune's Harvest Tomato & Veg Fertilizer 2-4-2, 36 oz
- Neptune's Harvest Fish Fertilizer 2-4-1, 36 Ounce

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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-02-09*