China Seaweed Extract Powder Manufacturer
HUMICO has been manufacturing Seaweed Extract Powder for 10+ years.
Supplying black, green and yellow seaweed extract powder fertilizer in different contents.
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Humico - Your Professional Seaweed Extract Powder Supplier
HUMICO supply 100% water-soluble seaweed extract powder sourced from clean, pollution-free oceans. It is rich in natural nutrients, alginic acid, and bioactive compounds that boost root growth, improve crop resistance, and increase yields.
Our HumxSeaweed (Seaweed Extract Powder) have excellent solubility and high purity. We can provide fast delivery & steady supply for large-volume orders. That’s why we’re trusted by worldwide fertilizer manufacturers, biostimulant formulators, and growers.
HumxSeaweed (Seaweed Extract Powder for Plants)
Water solublity: 100% soluble
Alginic acid: >40%
Nitrogen: >5%
K2O: >20%
Organic Matter: >30%
PH: 6-8
Appearance: Black Powder
Solubility: ＞99.9%
PH: 8-10
Organic Matter: ＞40%
Moisture: ＜5%
Potassium K2O: ＞18%
Size: 80-100mesh
Alginic Acid: 14%
Organic Matter: 40%
N: 0.5%
K2O: 15%
Ca: 0.5%
Mg: 1%
B: 0.5%
pH: 5-7
Water-Solubility: 100%
Black Seaweed Extract Powder
Product Video
What You See Is What You Get.
A clear, real-world view of our Black Seaweed Extract Powder.
👀 Appearance: Fine, black powder — clean and uniform
📏 Size: 80–100 mesh — perfect fineness for fast and complete water solubility
✅ High-quality, consistent texture
Seaweed Extract Powder
100% Water Solubility
HumxSeaweed (Seaweed Extract Powder) is made to dissolve 100% completely in water, leaving no lumps, no sediment, and no waste. Whether you’re using it for foliar spray, drip irrigation, or fertigation, it mixes fast and works efficiently.
✅ Instant Dissolution – No stirring or waiting
✅ Fine Powder – Easy handling and fast mixing
✅ Zero Residue – Clean application for all types of systems
Package of HumxSeaweed (Seaweed Extract Powder)
HUMICO offer a wide range of customizable packaging options to fit your market needs — from small retail packs to large bulk orders.
✅ Standard Sizes: 1kg, 2kg, 5kg, 10kg, 20kg bags
✅ OEM & Private Label Services — with your logo, language, and brand design
✅ Strong, Moisture-Proof Bags — to protect your product quality during shipping and storage
✅ Flexible Shipping — Support for pallets, mixed containers, or direct delivery to port
Whether you’re a distributor, fertilizer manufacturer, or agricultural supplier, HUMICO makes it easy to pack, sell, and ship.
Seaweed Extract Powder Documents
HumxSeaweed (Seaweed Extract Powder) Certificates
HUMICO HumxSeaweed is backed by globally recognized certifications.
🏅 OMRI Listed – Approved for use in organic farming in compliance with USDA/NOP standards
🏅 ISO 9001:2015 Certified – Ensures strict quality management and consistency in every production batch
These certifications prove our commitment to:
✔ Safe, sustainable, and organic inputs
✔ High production standards and traceability
✔ Meeting the demands of global distributors, formulators, and growers
Choose HUMICO – a certified, trusted partner for high-quality seaweed extract powder fertilizer.
At HUMICO, we actively participate in the world’s leading agriculture and feed industry exhibitions.
• CAC Shanghai 2026 – 26th China International Agrochemical & Crop Protection Exhibition
• AgroChemEX (ACEShow) Shanghai China 2025
• CAC 2025 – 25th China International Agrochemical & Crop Protection Exhibition
• Sugarex Thailand 2024 & Agri Expo Thailand 2024
• Viv Select China 2024
• CAC 2024 – 24th China Agrochemical & Crop Protection Exhibition
FAQ of HUMICO HumxSeaweed (Seaweed Extract Powder)
What's the difference between black seaweed extract powder and green seaweed extract powder?
What’s the difference between black seaweed extract powder and green seaweed extract powder?
1：The contents are different.
The black seaweed extract powder contains 18% Alginic Acid, while the green one contains 40%.
2：The usage and precautions are different.
When spraying on leaves, if you use it on strawberries or other brightly colored fruits, the green seaweed extract powder can be sprayed directly on the fruit without any problem.
But for the black seaweed extract powder, please avoid spraying it on the fruit to prevent the surface from getting black stains.
What's your green seaweed extract powder derived from?
Our green seaweed extract powder is derived from Sargassum, Ascophyllum nodosum, and Enteromorpha, combined with 10% small peptides (amino acids).
Are you trading company or manufacturer?
We are manufacturer. Our manufacturing facility is nestled in the scenic landscapes of the Ningxia Autonomous Region. With an annual production capacity of 100,000 tons, we cordially invite you to visit our factory.
Do you offer samples?
Absolutely, we are happy to provide samples upon request. Once we receive your inquiry, we will promptly arrange to send samples to you.
What is your minimum order quantity (MOQ)?
Our standard MOQ is 1 kilogram.
What are the payment terms?
Typically, our payment terms are 30% TT in advance, with the remaining 70% TT against the BL copy. We also accept LC at sight.
Can you customize our bags or print our logo on them?
Absolutely, we welcome and accept OEM requests!
How do you maintain quality control?
We place immense value on the quality of our products. To ensure this, our quality control team is deeply involved at every stage of the production process. Each batch of our product undergoes rigorous testing, including HPLC, before dispatch. Additionally, pre-shipment inspections by SGS or PONY are conducted to guarantee the quality of our products.
How can I track my shipment after payment?
Rest assured, we will keep you updated on your shipment. Details including packing, tracking number, loading photos, and shipping documents will be sent to your email promptly.
How long does delivery take?
Our general delivery timeframe is 7-10 days, assuming we have the product in stock. If not, it may take between 10-15 days to arrange shipping.
Seaweed Extract Powder Uses
HUMICO seaweed extract powder is used for a variety of purposes in agriculture and horticulture:
Soil Amendment: Enhances soil health by improving structure, aeration, and nutrient content.
Plant Growth Nutrients: Contains natural essential nutrients and minerals that stimulate root development and overall plant growth.
Foliar Spray: Applied directly to plant leaves to quickly address nutrient deficiencies and boost health.
Disease and Pest Resistance: Strengthens plants’ natural defense mechanisms against diseases and pests.
Flowering and Fruiting: Encourages more abundant and healthier flowering and fruiting in plants.
Stress Reduction: Helps plants withstand environmental stresses like drought, salinity, and temperature extremes.
Hydroponics: Used in hydroponic systems to provide essential nutrients directly to plant roots.
Seed Treatment: Enhances seed germination and seedling vigor.
Lawn Care: Promotes healthier, greener lawns with improved grass growth.
Organic Farming: Ideal for organic farming due to its natural, eco-friendly properties.
Seaweed Extract Powder Fertilizer is valued for its versatility, effectiveness, and organic nature, making it a beneficial addition to a wide range of agricultural practices.
Benefits of Seaweed Extract Powder
HumxSeaweed (Seaweed Extract Powder Fertilizer) offers numerous benefits for plant growth and soil health:
Rich Nutrient Content: Provides a wide range of essential nutrients, minerals, and trace elements that are vital for plant health.
Essential Nutrients: Contains natural essential nutrients and minerals like cytokinins, auxins, and gibberellins, which stimulate plant growth and development.
Enhances Root Development: Promotes the growth of strong and healthy root systems, crucial for nutrient uptake.
Improves Soil Structure: Enhances soil fertility and water retention, creating a better environment for plant growth.
Increases Plant Resilience: Boosts plants’ natural defense mechanisms, making them more resistant to pests, diseases, and environmental stressors.
Stimulates Seed Germination: Improves germination rates and supports the early growth stages of plants.
Enhances Photosynthesis: Can lead to more efficient photosynthesis, contributing to overall plant health and productivity.
Eco-Friendly: As a natural, organic product, it’s safe for the environment and supports sustainable farming practices.
Versatile Application: Suitable for a wide range of plants, including vegetables, fruits, flowers, and lawns, and can be applied through foliar sprays or soil drenches.
Improves Plant Quality: Can lead to better tasting, more nutritious, and visually appealing crops.
Our Seaweed Extract Powder is particularly valued for its holistic approach to plant care, enhancing both the growth and health of plants in a natural and sustainable way.
Ultimate FAQ Guide to Seaweed Extract Powder
What is the benefit of seaweed extract powder?
Seaweed extract powder is a natural biostimulant that boosts plant growth by enhancing root development, improving nutrient absorption, increasing stress resistance, and promoting better flowering and fruit setting.
It also supports soil health by stimulating beneficial microbes and improving structure.
Safe, eco-friendly, and suitable for foliar spray, soil application, and seed treatment, it helps crops grow stronger, healthier, and more productive.
