A bowl of bright black Ihumate seaweed micro granules showing uniform particle size and purity
Ihumate black micro granule seaweed extract, high active alginic acid content, fully water-soluble organic fertilizer
Ihumate black micro granule seaweed extract all standard export packaging, supports OEM & ODM customization
Precise particle size comparison of Ihumate black micro granule seaweed extract with a ruler
Water solubility test of Ihumate black micro granule seaweed extract, dissolves rapidly into clear dark solution
A bowl of bright black Ihumate seaweed micro granules showing uniform particle size and purity
Ihumate black micro granule seaweed extract, high active alginic acid content, fully water-soluble organic fertilizer
Ihumate black micro granule seaweed extract all standard export packaging, supports OEM & ODM customization
Precise particle size comparison of Ihumate black micro granule seaweed extract with a ruler
Water solubility test of Ihumate black micro granule seaweed extract, dissolves rapidly into clear dark solution

Black Seaweed Extract Micro Granules

  • Appearance: Black Micro Granules
  • Water Solubility: 100%
  • Alginic Acid + Polysaccharides: > 30%
  • Nitrogen: > 3%
  • Potassium Oxide: > 18%
  • Organic Matter: > 30%
  • pH: 8-9
Related Products
( Customer Reviews)

Black Seaweed Extract Micro Granules (SEAWEED 100)

Alginic Acid + Polysaccharides Black Micro-Granules: High-Activity Natural Seaweed Weakly Acidic Biostimulant

The scientific combination of alginic acid + polysaccharides (>30%, core advantage), nitrogen (>3%), potassium (>18%) and organic matter (>30%) features a uniform 1mm black micro-granule form, with 100% water solubility and a mild pH 8-9 formula. Using a concentrated purification process, it retains the native active nutrients of natural seaweed, achieving multidimensional synergy of "seaweed active stimulation + macro, secondary and micronutrient supply + organic matter soil nourishment and root protection". It provides balanced and stable nutrients with high absorption and utilization rates, integrating multiple benefits such as growth promotion, stress resistance, soil improvement, seedling strengthening and quality enhancement.

1. Synergistic nutrient ratio, efficient absorption for growth: With high-content alginic acid and polysaccharides as the core functional carriers, combined with a high-potassium formula and slow-release nitrogen source, it comprehensively supplies key nutrients during crop growth periods. The high-concentration organic matter provides long-term fertilizer retention, reducing nutrient leaching loss and breaking the bottleneck of nutrient fixation in soil. The 1mm black fine micro-granules have uniform texture and excellent dispersibility. Being 100% water-soluble with no precipitation or residue, they dissolve and penetrate quickly, activate beneficial soil microorganisms, alleviate nutrient antagonism, promote rapid nutrient transport and absorption, and support healthy plant growth.

2. Soil improvement: The product has a stable pH of 8-9, weakly acidic, which can specifically adjust the pH of alkaline soils and balance soil physicochemical properties. The organic matter combined with green micro-granules promotes the formation of soil aggregate structure, loosens and activates the soil, improves aeration, water and nutrient retention, while nourishing beneficial soil microorganisms, accelerating microbial reproduction, and optimizing the rhizosphere microecology. It achieves dual effects of "biological activation + structural improvement" for soil improvement, suitable for various soil types including sandy soil.

3. Synergistic root promotion: Rapid root formation and long-term vitality maintenance. The small molecular active substances of alginic acid + polysaccharides quickly stimulate the emergence of crop capillary roots and lateral roots, showing noticeable effects within a few days after planting, with a significant increase in root quantity. Nitrogen supports root cell division, potassium enhances root stress resistance toughness, and the black micro-granules optimize rhizosphere nutrient supply. The four work synergistically to achieve "rapid root promotion and long-term root strengthening", maintaining root vitality until the final harvest stage and preventing premature crop aging.

4. Pathogen inhibition and disease resistance: Enhancing stress resistance and disease control. Alginic acid + polysaccharides activate the crop’s own immune system, regulate soluble sugar permeability, and enhance the plant’s ability to recognize and resist stresses such as drought, extreme temperatures, salinity and alkalinity. They inhibit the reproduction of harmful microorganisms, reduce the incidence of soil-borne diseases, suppress pathogen growth, forming a dual stress resistance line, and minimize yield losses caused by stress and disease.

5. Quality and efficiency improvement: Yield optimization and convenient application. The synergy of alginic acid + polysaccharides with nitrogen and potassium stimulates crop photosynthesis, promotes nutrient accumulation, improves fruit sugar content and quality, and extends shelf life. The black micro-granules have uniform particle size, are easy for large-scale broadcasting with no dust, and are 100% water soluble with no residue, allowing precise dosage control and reducing planting costs. Suitable for key growth stages such as seedling and flowering.

Expert advice: Suitable for various crops. It is recommended to dissolve in advance for drip irrigation or flushing; it can also be used for foliar spraying or broadcasting. Application during critical growth periods (post-transplant recovery, flowering and fruit set) yields better results. Combining with organic microbial fertilizers further enhances microbial synergy, achieving reduced input with increased efficiency and improved quality.

Black Seaweed Extract Micro Granules Specifications

Technical ParametersDetailed SpecsTesting MethodsReference Standards
AppearanceBlack Micro Granules--
Water Solubility100%Gravimetric MethodGB/T 20913
Alginic Acid + Polysaccharides> 30%SpectrophotometryNY/T 2117-2012
Nitrogen> 3%Titration after DistillationGB/T 8572
Potassium Oxide> 18%Flame PhotometryGB/T 8574
Organic Matter> 30%Potassium Dichromate Oxidation – External HeatingNY/T 1978-2010
pH8-9Potentiometric MethodNY/T 1973-2010

Black Micro Granule Seaweed Extract - Introduction

  • 1MM Uniform Micro Granules
  • Bright black color, high purity
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Black Micro Granule Seaweed Extract - Water Solubility

  • 100% Water Soluble
  • Fast Dissolving, No Residue
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COA, TDS, MSDS & HM Test Reports

Certificate of Analysis (COA)

Certificate of Analysis: Black Seaweed Extract Micro Granules

Technical Data Sheet (TDS)

TDS: Black Seaweed Extract Micro Granules

Safety Data Sheet (MSDS)

MSDS: Black Seaweed Extract Micro Granules

Heavy Metal Test Report

Heavy Metal Test Report: Black Seaweed Extract Micro Granules

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Need custom documents or specific test results?

Frequently Asked Questions

Ihumate FAQ: Sourcing, organic certification, logistics, and customization.
Apply for Ihumate Free Samples: Global shipping for lab compliance testing.
1

What are the core advantages of black micro-granule seaweed extract compared to traditional black seaweed extract?

The core advantages are concentrated in activity, absorption and adaptability: the active substance retention rate is over 92%, with a high content of natural auxins; the small molecular peptide structure can quickly penetrate the cell wall for absorption, showing faster effects, enabling rapid root promotion and maintaining long-term root vitality.
2

Are you a trading company or a manufacturer?

We are a professional manufacturing enterprise. Our modern factory is located in Huozhou, Linfen, Shanxi, China. With an annual capacity of 500,000 tons, we invite global partners to visit our facility.
3

How do you perform quality control?

4

Do you provide samples?

5

What are the payment terms?

6

How can I track my shipment after payment?

7

What is the Minimum Order Quantity (MOQ)?

8

Can you customize packaging or print our logo?

9

How long is the delivery time?

More questions about our products?

Application & Dosage: Black Seaweed Extract Micro Granules

Black micro granule seaweed extract is suitable for the whole growth period of various crops and multiple fertilization scenarios, promoting rooting and seedling strengthening, improving quality and yield, enhancing stress resistance and improving soil.

Fertilizer Manufacturing & Blending

  • Granular Fertilizers:
    Easily blended into granular NPK and compound fertilizers to promote rooting and seedling strengthening and improve crop nutrient absorption.
  • Liquid Fertilizers:
    As a functional additive directly added to various liquid fertilizers due to full water solubility.
  • Organic & Biological Fertilizers:
    Enhances chelation of nutrients, synergistically improves soil conditioning, fertility, growth promotion and stress resistance.

Drip Irrigation & Hydroponics

  • Drip Irrigation Systems:
    Easily dissolved in drip irrigation systems to ensure efficient nutrient delivery to roots.
  • Hydroponics:
    Suitable for hydroponic and greenhouse cultivation.

Application Ratio Scheme

Crop NameGrowth StageApplication Ratio
RiceSeedling Stage3–5 kg/ha
Pre-budding Stage3–5 kg/ha
Filling Stage3–5 kg/ha
Sweet Corn / PeanutGrowing Period3–5 kg/ha
Wheat / CottonJointing Stage3–5 kg/ha
Pineapple / MangoFruit Expansion Stage4–6 kg/ha
Citrus / LonganBud Break Stage5–8 kg/ha
Fruit Enlargement Stage6–10 kg/ha
BananaVegetative Growth Stage5–8 kg/ha
GrapePre- and Post-flowering4–6 kg/ha
StrawberryTransplanting Stage3–5 kg/ha
Tomato / LuffaInitial Flowering Stage4–6 kg/ha
Continuous Harvest Stage4–6 kg/ha
Flowering Cabbage / Crown DaisyWhole Growth Period3–5 kg/ha
PotatoTuber Formation Stage5–8 kg/ha
Purple Sweet PotatoTuber Expansion Stage5–8 kg/ha

Product Advantages: Black Seaweed Extract Micro Granules

Black micro granule seaweed extract provides multiple key benefits for plant growth and soil health, helping to improve agricultural productivity.

1

Growth & Root Promotion

High content of alginic acid and polysaccharides synergize with nitrogen and potassium to effectively stimulate plant growth and develop strong, robust roots.

2

Enhanced Stress Resistance

Helps crops withstand various environmental stresses, including drought, high salinity and extreme temperatures (heat or frost).

3

Improved Nutrient Uptake

As a natural chelating agent with full water solubility, it significantly improves soil nutrient availability.

4

Soil Health Improvement

Effectively boosts soil fertility by increasing organic matter and promoting microbial activity.

5

Disease Resistance & Quality Improvement

Strengthens the plant’s natural defense system, activates innate immune response and reduces disease incidence.

6

Green & Sustainable

Reduces reliance on synthetic fertilizers and adapts to modern fertilization methods such as drip irrigation and sprinkler irrigation.

Certifications: Black Seaweed Extract Micro Granules

Ihumate is backed by globally recognized certifications.

  • 🏅 OMRI Listed – Approved for organic use (USDA/NOP standards)
  • 🏅 CERES Certified – High-standard organic inputs for sustainable agriculture
  • ✔ Excellent international production process with full batch traceability
  • ✔ Meeting the strict demands of global distributors and formulators
Ihumate OMRI certificate proving compliance with USDA/NOP organic standards.
Ihumate Potassium Humate CERES organic certificate for EU and NOP standards.
Ihumate Potassium Fulvate CERES organic certificate ensuring global export quality.
Ihumate Mineral Humic Acid CERES organic certificate for high-end agriculture.
Ihumate Mineral Fulvic Acid CERES organic certificate for EU and NOP compliance.
Ihumate Sodium Humate CERES certificate for aquaculture, feed, and industrial use.
Ihumate Seaweed Extract CERES organic certificate, rich in natural hormones.

Ihumate Global Exhibition Videos

We showcase our Humic Acid, Seaweed, Liquid Fertilizer, and Bio-control series globally.
Join us at our 2026 exhibitions:
Event: Shanghai CAC (Fshow)
Booth: 12G05
Date: March 17-19, 2026
Address: No. 333 Songze Avenue, Qingpu District, Shanghai
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