--- product_id: 465304416 title: "Organic Sea-K for Plants Seaweed and Kelp Fertilizer Supplement Concentrated Extract Powder Nutrient" brand: "greenleaf nutrients" price: "72.61 DT" currency: TND in_stock: true reviews_count: 13 category: "Greenleaf Nutrients" url: https://www.desertcart.tn/products/465304416-organic-sea-k-for-plants-seaweed-and-kelp-fertilizer-supplement store_origin: TN region: Tunisia --- # 18%+ soluble potassium for vibrancy 100% water soluble powder 70+ vitamins, minerals & enzymes Organic Sea-K for Plants Seaweed and Kelp Fertilizer Supplement Concentrated Extract Powder Nutrient **Brand:** greenleaf nutrients **Price:** 72.61 DT **Availability:** ✅ In Stock ## Summary > 🌱 Elevate your garden game with nature’s most potent seaweed elixir! ## Quick Answers - **What is this?** Organic Sea-K for Plants Seaweed and Kelp Fertilizer Supplement Concentrated Extract Powder Nutrient by greenleaf nutrients - **How much does it cost?** 72.61 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/465304416-organic-sea-k-for-plants-seaweed-and-kelp-fertilizer-supplement) ## 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:** Perfect for hydroponics, soil, coco, peat, rockwool, and drip irrigation systems. - • **Advanced Extraction Purity:** Low-temp enzymatic hydrolysis locks in bioactive nutrients for peak plant vitality. - • **Boosts Growth & Resilience:** Enhances stress resistance, root viability, flowering, fruit potency, and Brix levels. - • **Certified Organic Excellence:** Dual OMRI & EU ECOCERT certified for trusted, clean plant nutrition. - • **Ultra-Concentrated Powerhouse:** 200g powder makes up to 400 gallons—maximize your growth potential! ## Overview Greenleaf Nutrients’ Organic Sea-K is a premium, 100% water-soluble kelp and seaweed extract powder, packed with over 70 vitamins, minerals, and enzymes. Certified organic by OMRI and EU ECOCERT, it uses advanced low-temperature enzymatic hydrolysis to preserve nutrient purity. With 18%+ soluble potassium and rich bioactives, it supports robust plant growth, stress resistance, and enhanced fruit and flower quality across all growing media and systems. ## 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! Legal Disclaimer: This product does NOT contain any pesticides, synthetic PGR’s, or and other EPA regulated ingredients. This product is fully compliant with all EPA rules and regulations. This product meets or exceeds all OMRI and state guidelines for heavy metals verified through independent lab testing, and is safe to be used on crops meant for human consumption. This is product is not currently registered, designed or intended for use as fertilizer in the states of Washington, Oregon or California. Please consult your state website (state department of agriculture or fertilizer) for guidance and list of appropriate and registered and approved fertilizers in your region. For questions regarding product pending compliance, or regulatory application process in your state, feel free to contact us! Review: I love it!! - I will keep this in my rotation. Works great as folier or root drench. I love it in those super hot days when plants get stressed. It helps them recover better. Review: After One Year of Use -- Best Fertilizer I've ever used - Bought this in June 2025 as an avid orchid collector. They say it takes a bit to truly observe the long term effects of proper fertilizing in your orchid collection which has been true in my experience. All I can say is, this is absolutely a staple in my orchid growing routine now. I use half a teaspoon per gallon because regular and lower dosage is better for orchids IMO. Anyway, the blooms I've had since I began using this a little under a year ago have been some of the strongest in my collection. Orchids that struggled to bloom again are spiking etc. Highly recc. ## 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 | | Application Method | Dissolve the powder in water and apply to plants | | Best Sellers Rank | #121,627 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #2,135 in Garden Fertilizers | | Brand | Greenleaf Nutrients | | Brand Name | Greenleaf Nutrients | | Coverage | Medium | | Customer Reviews | 4.6 out of 5 stars 565 Reviews | | Item Form | Powder | | Item Weight | 200 g | | Manufacturer | Greenleaf Nutrients | | Mixing Ratio | 1 tsp dissolved per 2 Gal of water and fed to plants | | Model Number | Sea-K-200g-FBA | | Number of Items | 1 | | Number of Packs | 1 | | Part Number | Sea-K-200g pouch | | Specific Uses For Product | Hydroponics, Soil, Plant Growth, Root Feeding and Foliar | | Target Species | plants | | UPC | 742776993208 | | Unit Count | 7.05 Ounce | ## Product Details - **Brand:** Greenleaf Nutrients - **Item Form:** Powder - **Item Weight:** 200 g - **Number of Packs:** 1 - **Specific Uses For Product:** Hydroponics, Soil, Plant Growth, Root Feeding and Foliar ## Images ![Organic Sea-K for Plants Seaweed and Kelp Fertilizer Supplement Concentrated Extract Powder Nutrient - Image 1](https://m.media-amazon.com/images/I/81AMZy-LTvL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ I love it!! *by J***N on July 25, 2026* I will keep this in my rotation. Works great as folier or root drench. I love it in those super hot days when plants get stressed. It helps them recover better. ### ⭐⭐⭐⭐⭐ After One Year of Use -- Best Fertilizer I've ever used *by P***A on April 13, 2026* Bought this in June 2025 as an avid orchid collector. They say it takes a bit to truly observe the long term effects of proper fertilizing in your orchid collection which has been true in my experience. All I can say is, this is absolutely a staple in my orchid growing routine now. I use half a teaspoon per gallon because regular and lower dosage is better for orchids IMO. Anyway, the blooms I've had since I began using this a little under a year ago have been some of the strongest in my collection. Orchids that struggled to bloom again are spiking etc. Highly recc. ### ⭐⭐⭐⭐⭐ Plants loved it *by N***R on May 16, 2026* My plants loved this. I added this to my transplant routine and my plants stayed perky. Was easy to add to a water bottle and dissolved fast --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/465304416-organic-sea-k-for-plants-seaweed-and-kelp-fertilizer-supplement](https://www.desertcart.tn/products/465304416-organic-sea-k-for-plants-seaweed-and-kelp-fertilizer-supplement) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-10-15*