Gold Member Since 2009
Audited Supplier
Qingdao Seawin Biotech Group Co., Ltd.

Seaweed Extract, Organic Fertilizer, Seaweed Fertilizer manufacturer / supplier in China, offering Alga 21st - Seaweed Extract, Seaweed Extract Powder/Flake Fertilizer (Seaweed Extract Powder / Flake), Seaweed Extract Fertilizer of Amino Acid (Seaweed Amino) and so on.

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Supplier Homepage Product Natural Seaweed Extract Alga 21st - Seaweed Extract

Alga 21st - Seaweed Extract

FOB Price: Get Latest Price
Min. Order: 3,000 kg
Port: Qingdao, China
Production Capacity: 600mt/Month
Payment Terms: L/C, T/T

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Basic Info
  • Model NO.: Alga 21st
  • Appearance: Powder
  • Chemical Character: Chemical Neutral
  • Solubility: 100%Soluble
  • Transport Package: 100g, 500g, 1kg, 10kg, OEM
  • Origin: China
  • Application: Vegetables, Flowers, Fruit
  • Infection on Soil: Physiological Neutral
  • Release Type: Quick
  • Trademark: Seawinner
  • Specification: Alga 21st
Product Description
Alga 21st
Seaweed Extract Powder / Flake)

Product feature: Black or brown powder / flake, 100% water soluble, pH: 8-10

Main ingredients:

Alginic Acid8-15%
Organic matter≥50%
Much secondary elements, microelements,
amino acid.

Meliorate soil, enhance plants ability of anti-stress, induce plants resistance to disease, improve crops quality, increase yield by 15 - 30%.

Foliar spray: Diluted by 1:2000-3000.
One picking crops: Apply 3~4 times in growing period.
Several picking crops: Apply after each picking.

Drip irrigation: Diluted by 1:2500-3000, apply 3~4 times in growing period. Dosage: 1.5-3 kg/ha.

1. Suggest apply in the morning or evening to get better effect.

2. Re-spray if it rains within 8 hours after spraying.

Validity: Three years

Packing: 100g/bag, 1kg/bag, 20kg/carton( bag), OEM.


Samples: Free sample ≤ 500g available upon request.

Price: Upon request. 

Registration support: Available.

Field demonstration: Upon request.


Qingdao Seawin Biotech Group Co., Ltd. is enjoying No.1 Market Share of China in the field of seaweed fertilizer.

Alga 21st - Seaweed Extract

Alga 21st - Seaweed Extract

Alga 21st - Seaweed Extract

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