[TL;DR] Choosing between seaweed extract flake and soluble seaweed extract powder mostly comes down to your application method and order volume. Seaweed Extract Algamas (16–18% water-soluble K2O, 10% alginic acid, 500 PPM natural PGR, OMRI listed) is built for foliar spray programs on field crops, orchards and turf. Soluble Seaweed Extract Powder (65% organic matter, 100% water-soluble, 1-ton MOQ with a free 500g sample) is built for fertigation lines and private-label OEM packaging. Both are manufactured by Tianjin Agritech Bioindustry Co., Ltd. from wild kelp raw material.
If you import or distribute crop biostimulants, you already know the seaweed fertilizer category is crowded with near-identical product descriptions. The real sourcing question rarely gets answered on a spec sheet: should this season's order be a granular/flake extract for your foliar spray program, or a soluble powder for fertigation and OEM retail lines? Getting the format wrong means wasted freight on a product your customers can't easily apply, or a bulk purchase that doesn't fit your private-label packaging plan. Below, we compare Tianjin Agritech Bioindustry's two flagship seaweed extract formats side by side, using only the specifications, dosage tables and FAQ data published on our own product pages - so you can match the right format to your market before you request a quote.
Seaweed Extract Algamas: Built for Scheduled Foliar Programs
Seaweed Extract Algamas is extracted from wild kelp (Laminaria, Ecklonia Maxima) through low-temperature enzymatic hydrolysis, which preserves more than 60 natural active substances - amino acids, plant hormones (auxin, cytokinin), seaweed polysaccharides and trace elements. It is fully water-soluble and suited to foliar spraying, drip irrigation, and soil application across fruit, vegetable and field crops.
| Potassium (K2O) | 16–18% |
| Alginic Acid | 10% |
| Organic Matter | 45–65% |
| PGR content | 500 PPM |
| pH | 9–11 |
Application timing is crop-specific and published in detail on the product page: for example, vegetables like eggplant and pepper are treated at the six-leaf stage, early bloom, and first fruit set (500–800 g/ha, diluted 1:3000), while grapes follow a cane-growth and full-bloom schedule (600–800 g/ha, diluted 1:2000–3000). It ships in 1kg bags (20 bags/CTN) for smaller distributors or 20kg cartons (72 CTN/pallet) for bulk buyers, and carries OMRI-listed organic certification.
Flake vs Powder: A Side-by-Side Comparison
| Attribute | Seaweed Extract Algamas | Soluble Seaweed Extract Powder |
|---|---|---|
| Form | Flake / powder, 100% soluble | Fine powder, 100% soluble |
| K2O | 16–18% | 10–18% |
| Organic Matter | 45–65% | 65% |
| Typical Method | Foliar spray, drip irrigation, soil application | Foliar spray and fertigation |
| Packaging | 1kg/bag (20bag/CTN); 20kg/CTN (72CTN/Pallet) | 10g / 100g / 1000g / 20kg; OEM custom 100g–25kg |
| MOQ / Sample | Case-quantity available on inquiry | 1-ton MOQ; free 500g trial sample |
| Best Fit | Field crops, orchards, turf on a scheduled spray program | Fertigation systems, hydroponics, private-label retail lines |
A 5-Step Checklist Before You Place the Order
- Match the format to your application equipment. Spray boom or backpack sprayer programs favor the flake extract's foliar timing tables; drip lines and hydroponic setups favor the fully soluble powder.
- Check the crop-stage dosage chart. Both products publish per-crop timing (e.g., six-leaf stage, early bloom, fruit set) - align this with your customers' growing calendar before ordering.
- Confirm certification needs. If your buyers require OMRI-listed organic inputs, Seaweed Extract Algamas carries this listing directly.
- Request the free sample and test report. The soluble powder line offers a free 500g trial sample ahead of the 1-ton MOQ, plus third-party batch test reports.
- Decide on packaging. Choose between standard carton sizes (1kg/20kg) or OEM custom bags (100g–25kg) if you plan to sell under your own brand.
Who Makes These Products
Tianjin Agritech Bioindustry Co., Ltd. originated from part of the China Seaweed Association's Science and Technology Institute, and is equipped with standard laboratories and testing equipment for raw material selection and quality supervision. The company runs a documented three-stage process - communication of specs, controlled production, and multi-stage quality inspection - and provides third-party test reports for each production batch. Products are exported to the EU, Latin America, the Middle East, and Asian markets, and OEM/ODM development is available for distributors building their own branded lines.
Frequently Asked Questions
Q: Does seaweed extract fertilizer lose potency during long-distance shipping or storage?
A: Stored in a cool, dark place, seaweed extract products typically remain effective for 6–12 months once the container is opened, so most export shipments arrive well within the usable window.
Q: What is the minimum order quantity for the soluble seaweed extract powder, and can I test it first?
A: The MOQ is 1 ton, and a free 500g sample is available for trial before you commit to a full order.
Q: Can I sell either product under my own brand?
A: Yes, OEM labeling and packaging customization is supported, from 100g retail sachets up to 25kg bags, with packaging designed to your brand requirements.
Q: How often should seaweed fertilizer be applied during the growing season?
A: A general guideline is every 2–4 weeks during active growth, adjusted upward slightly if plants show nutrient deficiency or stress signs.
Q: Is there quality documentation I can share with my own customers?
A: Third-party test reports and internal quality standards are provided, and each batch is checked for physical, chemical, and solubility indicators before shipment.
In short: pick Seaweed Extract Algamas when your program runs on a foliar spray schedule and you want OMRI-listed organic backing; pick Soluble Seaweed Extract Powder when your line runs on fertigation, or when you're building a private-label retail product with flexible OEM packaging.
For a tailored recommendation, dosage plan, or quotation, please contact our technical team at yangsc@agritechsolution.com or via WhatsApp at +86 158 1040 7523.