What is the lead time for orders?

Peak season lead time is one month, while off-season lead time is within 15 workdays.

Can I get free samples?

Yes, free samples of up to 500g are available upon request.

What certifications does the product have?

The product is certified with ISO9001, ISO, and CE.

Seaweed Plus Humic Acid: Enhance Soil Improvement Effect

Name: Seaweed Plus Humic Acid: Enhance Soil Improvement Effect
Brand: Qingdao Seawin Biotech Group Co., Ltd.
SKU: 777721482

Shandong, ChinaQingdao Seawin Biotech Group Co., Ltd.

Negotiable

2,000 L

Sample price:US$1.00/piece.Request sample

Product profile

Customization

Available

Certification

ISO9001, ISO, CE

Application

Vegetables, Flowers, Fruit

Model NO.

Seaha

Appearance

Liquid

Infection on Soil

Physiological Neutral

Chemical Character

Chemical Neutral

Release Type

Slow

Solubility

100% Soluble

Transport Package

1L, 4L, 5L, 10L, 20L

Specification

Seaha

Trademark

Seawinner

Origin

China

Production Capacity

8000L/Month

Key features

Soil Improvement: Promotes soil aggregate structure and increases oxygen content.

Stress Resistance: Enhances crop resistance to drought, cold, and high temperatures.

Yield Enhancement: Promotes plant growth, fruit enlargement, and improves crop quality.

Market Leader: Qingdao Seawin holds No.1 market share in China for seaweed fertilizer.

Certified Quality: Products certified with ISO9001, ISO, and CE standards.

Full Solubility: 100% soluble liquid formulation for efficient absorption.

Flexible Packaging: Available in 100ml to 10L sizes for various application needs.

Free Samples: Free samples up to 500g available upon request.

Company profile

Qingdao Seawin Biotech Group Co., Ltd.

Shandong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service AvailableExport Year: 2004-06-01 CertifiedNearest Port: Qingdao PortAverage Response Time: ≤18h CertifiedTerms of Payment: LC, T/T, Western Union

AI-Powered supplier vetting

SummaryQingdao Seawin Biotech Group Co., Ltd. is a China-based limited company founded in 2000, with 556 employees and operations in Shandong. It is identified as a manufacturer and processor focused on seaweed fertilizers, organic fertilizers, NPK fertilizers, fertilizer equipment, and related products. The supplier reports more than 10 production lines, a 260,000 m² manufacturing plant, annual seaweed extract and finished-product output of 600,000 tons, and export markets in South America, Europe, and North America. Its agronomist team provides fertilizer solutions and crop-protection advice, while reported certifications include ISO 9001, ISO 14001, ISO 45001, and ECOCERT organic-input certification. The available data supports strong production capability, certification coverage, and technical support. However, evidence is insufficient to confirm customization capability, financial credibility, or established customer cases; the trade records provided show only one transaction per listed buyer.

Supplier typeThe supplier is a limited company founded in 2000 and is explicitly described as a professional manufacturer focused on the exploitation, development, production, and marketing of marine biological products. Its product keywords and manufacturing descriptions identify it as a producer of seaweed fertilizer, organic fertilizer, NPK fertilizer, and fertilizer equipment rather than solely a trading company.

CertificationsThe supplier reports ISO9001:2015, ISO14001:2015, and ISO45001:2016 management-system certificates. Its SEAWINNER organic fertilizers are also stated to be certified by ECOCERT as organic agricultural inputs under both EU and NOP standards, providing explicit evidence of multiple quality, environmental, occupational-safety, and product certifications.

R&D capabilityThe supplier reports 41 years of total R&D-engineer experience and describes development and industrial utilization of marine biological resources. Its agronomist team provides professional fertilizer solutions and crop-protection advice, indicating technical development capability, although the slices do not provide specific R&D projects, patents, laboratories, or newly developed products.

Production capacityProduction capability is strongly supported by 556 employees, more than 10 production lines, a reported 260,000 m² manufacturing plant, two Shandong production bases, and stated annual output of 600,000 tons of seaweed extract and finished products. The supplier also reports lead times of within 15 workdays in off-peak periods and one month during peak periods, further indicating organized manufacturing capacity.

Product Q&A

Q:What are the main benefits of Seaweed Plus Humic Acid?

It coordinates vegetative and reproductive growth, prevents leaf chlorosis, enhances photosynthesis, increases yield, improves quality, and boosts resistance to drought, cold, and high temperatures.

Q:How should this product be applied?

For drip irrigation, use 10-15L/ha, 2-4 times at 10-15 day intervals. For foliar spray, dilute 500-800 times and apply 3-4 times at 7-10 day intervals.

Q:What is the shelf life of the product?

The validity period is two years.

Q:Is OEM/ODM service available?

Yes, both OEM and ODM services are available.

Q:What are the payment terms?

Payment terms include LC, T/T, and Western Union.