Seaweed extract for plants

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$2,499.00 - $3,999.00 / Metric Ton | 2 Metric Ton/Metric Tons Seaweed extract for plants (Min. Order)
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Quick Details
Biological Fertilizer
Place of Origin:
Fujian, China
Brand Name:
Vastland Seaweed extract
Model Number:
Alga-XM01 Seaweed extract
CAS No.:
Release Type:
Other Names:
Seaweed Fertilizer
Black flake
Organic matter:
Alginic acid:
Supply Ability
Supply Ability:
2000 Metric Ton/Metric Tons per Month Seaweed extract for plants
Packaging & Delivery
Packaging Details
20kg kraft paper bag, 13mts/20'FCL or according to customers' requirments.
Port of China
Lead Time :
Within 10-15day after confirmation.

Seaweed extract for plants




Appearance:  black flake;

Odor: smell of seaweed

Organic matter: 50%min,

Total N:1%min,



Alginic acid: 10%min (normally is 25%),

pH: 8-11,

Moisture: 5%max


AppearanceBlack powder or black flake Black powder or black flake
Odorsmell of seaweed Smell of seaweed
Organic matter45-55%min50%min
Total nitrogen1%min1%min
Alginic acid18%min,10%min (normally is 25%)




Soluble Seaweed Extract Powder is a 100% fresh seaweed extract and naturally composed of nutrients, trace minerals, carbohydrates such as alginic acids and plant growth promoters. It will rapidly correct nutrient deficiencies, improve fruit set, help plants endure environmental stress and has antitoxins to fend off bacteria and viruses, and to repel insects. It is suitable for all crops and applications including field crops, potting soil, vegetable and flower gardens, orchards and turf grass.


3. Application:



Restrain and resist bacilli, Improve crop’s quality and nutritional value of plant, enhance resistance of crops, induce plants to enhance resistance 

to disease, balance nutrition


For example:Function and Effects in Agriculture


1)Increased Yield and Quality

Increased root growth is an important part of yield building and quality improvement. In turf trials,seaweed fertilizer treated plots had 67% to 175% more roots than untreated plots, and plots treated during autumn showed a 38% increase in spring growth and 52% more roots than untreated plots. For fruits and vegetables,foliar applications of seaweed fertilizer consistently increased yield from 15.5% to 26.4% during a three-year trial period.


2)Broad-spectrum Mineralisation:

Seaweed contains the full mineral spectrum, because it grows in seawater. There are never droughts or crop failures in this aquatic environment and an abundance of food is always assured, because, as we impoverish the land through poor management, the eroded material simultaneously enriches the ocean.


3. Natural Chelation:

Chelation involves the neutralisation of positively charged elements (cations) to facilitate their easy entry into the negatively charged plant. Minerals can be seven to ten times more plant-available in chelated form. Kelp contains a powerful chelating agent called Mannitol, which naturally chelates the full suite of cations already present in seaweed. There is also sufficient Mannitol (10% of dry weight) to offer chelation capacity for any other cations that may be applied in conjunction with seaweed fertilizer.


4) Improved Soil Structure and Water Holding Capacity

Alginic acid,is a soil conditioner, which combines with metallic elements to form cross-linked polymers of greatly increased molecular weight. These salts swell when wet and retain moisture tenaciously. In the process, they help the soil to form a crumb structure. Part of this crumb forming process is physical and part is biological.


5)Pronounced Fungal Stimulation:

Seaweed contains a rich lode of long-chain sugars, which are specific fungi foods. Fungi form the aggregates which are the essence of crumb structure. They are also intimately involved in nutrient availability, decomposition and disease protection.


4.Package and storage

1) 20kg kraft paper bag, 13mts/20'FCL

2) According to customers' requirments.

  Storage :In sealed and damp-proof place




Xiamen Vastland Co., Ltd. Founded in 1998, with more than 15 years experience, our company now become one of the most efficient and reliable fertilizers and plant growth regulators manufacturers and suppliers.

Our products are manufactured according to the top standard and have exported to over 80 countries and across 5 major continents. We provide customers with the right combination of quality products and expert knowledge that best serve their needs.

To guarantee all products and services, Xiamen Vastland Chemical Co., Ltd. has been certified by ISO9001: 2008, CQC. etc.


We able to provide:

  • Single soluble fertilizers
  • Soluble NPK fertilizers
  • Liquid fertilizers
  • Micronutrients
  • Organic fertilizers
  • Compound NPK fertilizers
  • Plant growth regulators
  • Pesticides

We also provide made-to-order service to design and produce fertilizers to suit customers’ exact needs. We would love the opportunity to meet with you and learn about how we can devise a crop fertility plan to help you grow the best quality crops in a healthy, safe and environmentally friendly manner.

We will do everything that we can in order to answer your questions and build a winning business relationship.





The pre-sale commitments:

After the effective communication ,we will offer our best price and the quatity you want,to meet the clients' satisfaction.


Sale commitment:

 If any problems, please contact us at once, and we will solve it in time.


After-sales commitment:

Our goal is Long term cooperation relationship.Therefore,we always try our best to satisfy our clients’ need.