Ihumate calcium seaweed liquid fertilizer promotional image, showing dual-channel transport technology and calcium deficiency prevention principle
Front view of Ihumate CALCIUM SEAWEED liquid fertilizer, sugar alcohol chelated technology, high active calcium for fast fruit and vegetable calcium supplementation
Ihumate CALCIUM SEAWEED full-spec packaging (1L-10L-IBC), supports global OEM labeling and export
Laboratory display of Ihumate CALCIUM SEAWEED liquid, clear, transparent, precipitation-free and highly stable form
Ihumate calcium seaweed liquid fertilizer promotional image, showing dual-channel transport technology and calcium deficiency prevention principle
Front view of Ihumate CALCIUM SEAWEED liquid fertilizer, sugar alcohol chelated technology, high active calcium for fast fruit and vegetable calcium supplementation
Ihumate CALCIUM SEAWEED full-spec packaging (1L-10L-IBC), supports global OEM labeling and export
Laboratory display of Ihumate CALCIUM SEAWEED liquid, clear, transparent, precipitation-free and highly stable form

Calcium Seaweed

  • Density: 1：1.37
  • Calcium: > 22%
  • Seaweed Extract: > 2%
Related Products
( Customer Reviews)

Calcium Seaweed

Active Calcium + Seaweed Extract: Dual Protection for Crop Stress Resistance and Quality Improvement

This product is a high-efficiency synergistic liquid calcium fertilizer with a density as high as 1:1.37. Its core components are high-content calcium oxide (>22%) and natural seaweed extract (>2%). This innovative combination solves calcium deficiency in crops and comprehensively improves crop quality and resistance through biostimulants:

1. Rapid Calcium Supplementation: Strengthens cell wall structure. With up to 22% calcium oxide, it quickly supplies active calcium needed by crops, effectively prevents physiological diseases such as bitter pit, blossom-end rot, fruit cracking, and weak stems, and builds solid plant cell structures.

2. Seaweed Synergy: Promotes efficient calcium absorption. More than 2% seaweed extract is rich in natural active substances, which improve the transportation and translocation efficiency of calcium ions in plants, prevent calcium from being fixed in soil, and accelerate its accumulation in fruits and leaves.

3. Physical Advantages: Clear and easy to apply. The 1:1.37 high-density formula ensures a clear, transparent liquid with no precipitation or impurities. It does not clog equipment in foliar spray or drip irrigation, ensuring convenient and uniform application.

4. Enhanced Resistance: Improves crop adaptability. Seaweed extract acts as a natural stress-resistant factor, activates crop defense mechanisms, enhances resistance to drought, salinization, diseases and pests, and is especially suitable for use under adverse conditions.

5. Quality Improvement: Optimizes fruit marketability. Calcium is a key element determining fruit firmness and storage tolerance. Combined with seaweed extract, it significantly improves fruit uniformity, extends shelf life, and increases overall yield and economic value.

Expert Recommendation: Suitable for crops with high calcium demand during fruit swelling, flowering and fruit setting stages. Recommended for fruits and vegetables prone to physiological calcium deficiency, such as tomatoes, peppers, melons, apples and citrus. Can be applied by foliar spray or irrigation.

Calcium Seaweed Specifications

Technical ParametersDetailed SpecsTesting MethodsReference Standards
Density1：1.37Hydrometer Method / Volumetric Flask Weighing MethodNY/T 1973
Calcium> 22%Atomic Absorption SpectrophotometryNY/T 1973
Seaweed Extract> 2%SpectrophotometryNY/T 2117-2012

CALCIUM SEAWEED - Introduction Video

  • High-concentration calcium
  • Good fluidity
Watch More

COA, TDS, MSDS & HM Test Reports

Certificate of Analysis (COA)

Certificate of Analysis: Calcium Seaweed

Technical Data Sheet (TDS)

TDS: Calcium Seaweed

Safety Data Sheet (MSDS)

MSDS: Calcium Seaweed

Heavy Metal Test Report

Heavy Metal Test Report: Calcium Seaweed

Download Support

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

Why can this Calcium Seaweed effectively prevent fruit cracking and blossom-end rot?

Calcium is a key component of plant cell walls. Calcium deficiency leads to loose cell wall structure, making physiological diseases (such as fruit cracking and blossom-end rot) highly likely to occur under drastic changes in water and nutrients. The highly active calcium in this product quickly strengthens cell walls, while seaweed extract ensures efficient calcium transport to the parts of fruits where it is most needed, solving the problem fundamentally.
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: Calcium Seaweed

Application Instructions: Suitable for foliar spray and drip irrigation; foliar spray is preferred (targeted and fast absorption). Foliar spray: Dilute 800–1200 times, 1500 times for seedling stage. Spray evenly on both sides of leaves and fruit surfaces at 0.8–1.2 L per mu. Drip irrigation: Dilute 1000–1500 times and apply evenly with irrigation water at 1.5–2.5 L per mu. Shake well before use. With its nutrient-rich density of 1.37, it ensures calcium and seaweed active ingredients reach target sites accurately. Strictly avoid mixing with high-phosphorus or ammonium nitrogen fertilizers.

Fertilizer Manufacturing & Blending

  • Liquid Fertilizer Compounding:
    With >22% high-concentration CaO and >2% seaweed extract, it can be used as a core raw material to formulate high-end foliar fertilizers and anti-cracking fertilizers for fruits and vegetables, improving calcium supplementation and stress resistance of finished products. Suitable for large-scale fertilizer production, compatible with most amino acid and potash raw materials without antagonism.
  • Custom Fertilizer Formulation:
    Can be compounded with boron fertilizer, magnesium fertilizer, etc., according to crop nutrient requirements to create special nutrient supplements for fruit swelling stages, targeting physiological diseases caused by calcium deficiency and meeting precise fertilization needs of different crops.
  • Fertilizer for Water-Fertilizer Integration:
    Uniform fluid property with density 1.37 allows adjustable dilution ratio, suitable for water-fertilizer integration systems in greenhouses and fields, realizing precise calcium supplementation, biostimulation and efficient irrigation simultaneously, reducing labor input.

Drip Irrigation & Hydroponics

  • Drip Irrigation System:
    100% water-soluble with no residue, does not clog drip pipes and filters. Weak acid-base property does not damage soil balance, suitable for large-scale orchards, vegetable gardens and farmland drip irrigation, especially for calcium supplementation in alkaline soil crops.
  • Spraying Operations:
    Seaweed extract enhances solution adhesion and spreadability with uniform droplets, suitable for manual and drone spraying. Application during young fruit and swelling stages quickly supplements calcium and active substances, supporting emergency calcium supply and routine growth regulation.

Application Ratio Scheme

Crop NameGrowth StageApplication Ratio
RiceTillering Stage2.5-3.5 L/ha
Booting Stage3.5-4.5 L/ha
Filling Stage3.0-4.0 L/ha
Wheat/BarleyJointing Stage3.0-4.0 L/ha
CornJointing Stage2.8-3.8 L/ha
Grand Growth Stage3.5-4.5 L/ha
CottonBudding Stage3.0-4.0 L/ha
Flowering & Bolling Stage4.0-5.0 L/ha
Citrus/OrangeYoung Fruit Stage4.5-5.5 L/ha
Fruit Swelling Stage5.0-6.0 L/ha
Apple/PearPost-Flowering Stage5.0-6.0 L/ha
Fruit Swelling Stage4.5-5.5 L/ha
GrapeFruit Swelling Stage4.5-5.5 L/ha
BananaVegetative Growth Stage5.5-6.5 L/ha
Tomato/PepperEarly Flowering Stage2.5-3.5 L/ha
Young Fruit Stage3.5-4.5 L/ha
Fruit Swelling Stage4.0-5.0 L/ha
StrawberryFruit Swelling Stage2.5-3.5 L/ha
Cucumber/LuffaEarly Fruiting Stage3.0-4.0 L/ha
Peak Fruiting Stage4.0-5.0 L/ha
PotatoTuber Formation Stage3.5-4.5 L/ha
PeanutPegging Stage3.0-4.0 L/ha

Product Advantages: Calcium Seaweed

Seaweed-chelated, high-concentration calcium supplementation: With >22% CaO as the core, plus >2% seaweed extract and nutrient-dense density 1.37, it integrates precise nutrient supply, anti-cracking, quality improvement and efficient absorption.

1

Precise Supply of High-Concentration Chelated Calcium

CaO content >22%, using chelated calcium source with density 1.37 fluid system to avoid soil fixation. Rapidly relieves fruit cracking, blossom-end rot caused by calcium deficiency, and accurately meets calcium demand in all growth stages.

2

Seaweed Synergistic Enhancement

Seaweed extract content >2%, rich in alginic acid, mannitol and other active substances. Builds calcium absorption channels, promotes calcium transport to fruits and young shoots, regulates crop growth rhythm, achieving dual effects of “calcium supplementation + conditioning”.

3

High Absorption and Utilization Efficiency

Chelation technology combined with surface activity of alginic acid makes calcium absorption rate over 80%, far exceeding traditional single calcium fertilizers, reducing nutrient waste and application cost.

4

Anti-Cracking, Quality Improvement & Yield Increase

Calcium strengthens cell wall toughness, seaweed actives optimize fruit metabolism. Together they significantly reduce cracked and deformed fruits, improve fruit firmness, color and sugar content, extend shelf life, and increase planting income.

5

Enhanced Stress Resistance and Protection

Synergy of calcium and seaweed polysaccharides enhances cell wall stability, improves tolerance to drought, low temperature, salinity and pathogens, reducing negative impacts of adverse environments on yield and quality.

6

Adaptable to Diverse Planting Scenarios

Weak acid-base property, can be mixed with most pesticides and fertilizers (avoid high phosphorus, ammonium nitrogen). Suitable for field, greenhouse, compatible with manual, drone and water-fertilizer integration application, with wide application range.

Certifications: Calcium Seaweed

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
Watch More