---
product_id: 638636546
title: "Seaweed and Kelp Fertilizer for Plants - Organic Sea-K - Concentrated Extract Powder Nutrient Makes 700 Liters"
brand: "greenleaf nutrients"
price: "217 kr"
currency: DKK
in_stock: true
reviews_count: 13
category: "Greenleaf Nutrients"
url: https://www.desertcart.dk/products/638636546-seaweed-and-kelp-fertilizer-for-plants-organic-sea-k-concentrated
store_origin: DK
region: Denmark
---

# 18%+ soluble potassium 70+ vitamins & minerals 100% water soluble powder Seaweed and Kelp Fertilizer for Plants - Organic Sea-K - Concentrated Extract Powder Nutrient Makes 700 Liters

**Brand:** greenleaf nutrients
**Price:** 217 kr
**Availability:** ✅ In Stock

## Summary

> 🌱 Elevate your garden game with nature’s most concentrated seaweed secret!

## Quick Answers

- **What is this?** Seaweed and Kelp Fertilizer for Plants - Organic Sea-K - Concentrated Extract Powder Nutrient Makes 700 Liters by greenleaf nutrients
- **How much does it cost?** 217 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/638636546-seaweed-and-kelp-fertilizer-for-plants-organic-sea-k-concentrated)

## Best For

- greenleaf nutrients enthusiasts

## Why This Product

- Trusted greenleaf nutrients brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Versatile Application:** Fully water soluble powder fits hydroponics, soil, coco, peat & more.
- • **Pure & Potent Organic Power:** OMRI & EU ECOCERT certified for trusted, sustainable farming.
- • **Maximized Nutrient Absorption:** Advanced low-temp enzymatic extraction preserves bioactive potency.
- • **Ultimate Plant Vitality Boost:** Harness 70+ vitamins, minerals & enzymes for lush, vibrant growth.
- • **Stress Resistance & Yield Amplifier:** Boosts root health, germination, fruit expansion & Brix levels.

## Overview

Sea-K is a premium organic seaweed and kelp extract powder, delivering over 70 essential vitamins, minerals, and enzymes in a 100% water-soluble form. Certified by OMRI and EU ECOCERT, it supports robust plant growth, stress resistance, and enhanced yields with high potassium content (18%+ soluble K). Ideal for all growing systems including hydroponics and soil, this 200g ultra-concentrated powder makes up to 700 liters of nutrient-rich solution, perfect for professional and passionate gardeners aiming for vibrant, healthy plants.

## Description

Product description Kelp seaweed extract has long been known as one of the most effective, natural and potent ways to improve your plants. Improve resistance to stress; promote fruit and flower expansion, coloring and potency, and increase Brix! Rich concentrations of more than 70 vitamins, minerals, and enzymes helps benefit your plants and revitalize your soil media. Sea-K Kelp is extracted from species Ascophyllum nodosum, Sargassum, Laginariausing the most advanced, low temperature enzymatic hydrolysis processes, maintaining a light brown color and highest purity of beneficial bioactive ingredients. 100% water soluble powder form suitable for any growthing system or media. Including greenhouse & outdoor drip irrigation, hydroponics, coco, peat, soil, rockwool, etc. High Potassium(K) for vibrancy, with over 18% soluble K! Also high levels of soluble Magnesium (Mg), Calcium (Ca), Iron (Fe), etc. Promotes strong growth, root viability, germination and yields. Rich in polysaccharides, cytokins, auxins, purines, IAA and more! Don’t miss this essential nutrient for your plants! Directions Dissolve the powder in water before application. Suitable for use in various growing systems, including greenhouse & outdoor drip irrigation, hydroponics, coco, peat, soil, rockwool, etc. Follow package instructions for specific application rates and methods. P.when('A').execute(function(A) { A.on('a:expander:toggle_description:toggle:collapse', function(data) { window.scroll(0, data.expander.$expander[0].offsetTop-100); }); }); Safety Warning Avoid contact with skin and eyes. Use gloves, a dust mask, and goggles when handling. Keep out of reach of children and pets. May cause irritation if inhaled. See more

Review: Excellent quality - Excellent quality
Review: Cheap and plants love it. - This plant food is very effective. Its also great value for money as its in powdered form, so your not paying for a diluted product. It comes in a small packet and looks quite funky with that artwork. It has a definite smell which some people may not like, but I think all kelp products share this trait.

## Features

- 【Kelp seaweed extract】has long been known as one of the most effective, natural and potent ways to improve your plants. Improve resistance to stress; promote fruit and flower expansion, coloring and potency, and increase Brix! Rich concentrations of more than 70 vitamins, minerals, and enzymes helps benefit your plants and revitalize your soil media.
- 【OMRI and EU ECOCERT Organic】Dual Organic Agriculture certification (National Organic Program) for both USA and Europe for Organic farming and crop production.
- Sea-K Kelp is extracted from species Ascophyllum nodosum, Sargassum, Laginariausing the most advanced, 【low temperature enzymatic hydrolysis processes】, maintaining a light brown color and highest purity of beneficial bioactive ingredients.
- 【100% Water Soluble Powder】 Suitable for any growing system or media, including greenhouse & outdoor drip irrigation, hydroponics, coco, peat, soil, rockwool, etc. 200g ultra concentrated bag size makes up to 400 gallons!
- 【High Potassium(K)】 For vibrancy, with over 18% soluble K! Also high levels of soluble Magnesium (Mg), Calcium (Ca), Iron (Fe), etc.
- 【Promotes strong growth, root viability, germination and yields.】 Rich in polysaccharides, cytokins, auxins, purines, IAA and more! Don’t miss this essential nutrient for your plants!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B096L9TP26 |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 20,808 in Garden ( See Top 100 in Garden ) 215 in Multi-Purpose Fertilisers |
| Coverage | Full |
| Customer Reviews | 4.6 4.6 out of 5 stars (478) |
| Date First Available | 2 Jun. 2024 |
| Item Package Quantity | 1 |
| Item Weight | 200 g |
| Item model number | 742776993208 |
| Manufacturer | Greenleaf Nutrients |
| Part number | Sea-K-200g pouch |
| Product Dimensions | 22.86 x 15.24 x 1.27 cm; 200 g |
| Size | 200g |
| Specific uses | Plant Growth |

## Product Details

- **Brand:** Greenleaf Nutrients
- **Item form:** Powder
- **Item weight:** 200 Grams
- **Manufacturer:** Greenleaf Nutrients
- **Specific uses for product:** Plant Growth

## Images

![Seaweed and Kelp Fertilizer for Plants - Organic Sea-K - Concentrated Extract Powder Nutrient Makes 700 Liters - Image 1](https://m.media-amazon.com/images/I/91woCrr3R0L.jpg)
![Seaweed and Kelp Fertilizer for Plants - Organic Sea-K - Concentrated Extract Powder Nutrient Makes 700 Liters - Image 2](https://m.media-amazon.com/images/I/915iRCNy+4L.jpg)
![Seaweed and Kelp Fertilizer for Plants - Organic Sea-K - Concentrated Extract Powder Nutrient Makes 700 Liters - Image 3](https://m.media-amazon.com/images/I/51UyiK273+L.jpg)
![Seaweed and Kelp Fertilizer for Plants - Organic Sea-K - Concentrated Extract Powder Nutrient Makes 700 Liters - Image 4](https://m.media-amazon.com/images/I/612M8v+LZPL.jpg)
![Seaweed and Kelp Fertilizer for Plants - Organic Sea-K - Concentrated Extract Powder Nutrient Makes 700 Liters - Image 5](https://m.media-amazon.com/images/I/41UXktb+amL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent quality
*by R***G on 14 February 2026*

Excellent quality

### ⭐⭐⭐⭐⭐ Cheap and plants love it.
*by J***E on 12 March 2025*

This plant food is very effective. Its also great value for money as its in powdered form, so your not paying for a diluted product. It comes in a small packet and looks quite funky with that artwork. It has a definite smell which some people may not like, but I think all kelp products share this trait.

### ⭐⭐⭐⭐⭐ Quality
*by S***M on 3 December 2025*

Great for succulents, lithops and cactus. Goes a long way. Value for money

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-02-27*