| TL;DR | Seaweed extract, amino acid fertilizer and potassium humate are all plant biostimulants, but each solves a different problem. Use seaweed extract (Algamas: 16-18% K2O, 10% alginic acid) for root vigor and stress recovery, amino acid fertilizer (43% free amino acids) for fast nutrient uptake, and potassium humate (70-80% humic acid) for soil structure and saline-alkali land. Specs, dosages and a 4-step selection guide follow. |
The global biostimulants market is projected to grow from USD 4.97 billion in 2026 to USD 8.77 billion by 2031, a 12.0% CAGR, according to MarketsandMarkets. Seaweed extracts, amino acids and humic substances sit among the leading active ingredients.
For importers, distributors and formulators, the question is no longer whether to stock a biostimulant for abiotic stress such as drought and salinity, but which chemistry matches each customer's crop. This guide compares three Tianjin Agritech Bioindustry products using the data on their own product pages.
| Seaweed extracts: share of 2026 biostimulant market |
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34.8% | ||
| Fruits and vegetables: share of crop-type demand |
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41.9% | ||
| Europe: share of global biostimulant revenue |
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38.6% | ||
| Top five suppliers: combined market share |
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33.4% |
Source: MarkNtel Advisors, 2026 biostimulants market analysis.
What Each Biostimulant Delivers: Verified Specifications
All figures below come from the product pages at algasmars.com. Treat them as manufacturer data and confirm them in a small field trial before scaling up.
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Seaweed Extract Algamas: root vigor and stress recoveryMade from wild kelp (Laminaria, Ecklonia maxima) by low-temperature enzymatic hydrolysis, this fully water-soluble powder lists 45-65% organic matter, 16-18% K2O, 10% alginic acid and 500 ppm PGR. It also contains cytokinin, gibberellin, auxin, mannitol and betaine. An OMRI listing certificate appears on the seaweed extract product page. |
Amino Acid Fertilizer: fast nutrient uptakeBuilt from plant-sourced amino acids (18 types, including lysine, glutamic acid and threonine), it lists 43% free amino acids and 16% nitrogen. The manufacturer reports 30%-50% higher absorption efficiency than traditional fertilizers and supports foliar, drip, seed-soak and soil use. See the full amino acid fertilizer data sheet. |
Potassium Humate: soil structure and saline-alkali landExtracted from leonardite with potassium hydroxide, it lists 80% organic matter, 70-80% humic acid and 11-13% K2O at pH 8-10. The product page cites 20%-30% better fertilizer utilization from slow nutrient release, plus improved aggregate structure and water retention. Details: potassium humate. |
Seaweed Extract vs Amino Acid Fertilizer vs Potassium Humate: Side-by-Side
This table shows which product answers which problem, and what to watch for when applying each.
| Comparison | Seaweed Extract Algamas | Amino Acid Fertilizer | Potassium Humate |
| Source | Wild kelp (Laminaria, Ecklonia maxima) | Plant amino acids | Leonardite |
| Key analysis | K2O 16-18%, alginic acid 10%, organic matter 45-65%, pH 9-11 | Free amino acids 43%, nitrogen 16% | Humic acid 70-80%, K2O 11-13%, pH 8-10 |
| Primary job | Root development, drought and salinity tolerance, flowering and fruit set | Nutrient uptake, stress recovery, seed treatment | Soil structure, water and fertilizer retention, saline-alkali land |
| Application rate | Foliar 500-800 g/ha, diluted 1:2000-3000 | Foliar 800-1200x dilution; drip 5-10 kg/ha; seed soak 0.1%-0.3% for 6-12 h | Base or flush 8-12 kg/ha; drip 800-1000x dilution |
| Watch-out | Avoid very hot or rainy periods | Avoid strong acids and alkalis; do not over-apply | Avoid strong alkaline pesticides such as Bordeaux mixture; use a mother liquid for drip |
| Key takeaway: the three products differ in primary job, not in rank. Choose by crop stage and soil condition, not by price per kilogram. |
How to Choose a Biostimulant in 4 Steps
- Identify the main constraint. Is the crop short of vigor at flowering and fruit set, slow to take up nutrients, or growing in compacted or saline-alkali soil?
- Match the chemistry. Seaweed extract for root and stress support, amino acid fertilizer for quick uptake, potassium humate for soil conditioning.
- Set the dose by crop stage. In Agritech's grape case, irrigation at 3 kg/ha was applied twice, 30 days apart, plus 1 kg/ha as a foliar spray before flowering.
- Trial first, then customize. Test one block, then request an OEM/ODM formulation. The process runs from needs discussion to production, three-stage inspection and delivery.
Field Snapshots From Agritech's Own Product Pages
Both cases are customer reports published by the manufacturer. No yield percentages are given, so use them as dosing references rather than performance guarantees.
Grapes with Seaweed Extract AlgamasAfter germination, the grower irrigated twice every 30 days at 3 kg/ha, then sprayed foliage before flowering at 1 kg/ha per application. The customer reported uniform crop growth, high yield and significantly improved quality. |
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Cucumbers with Potassium HumateThe grower mixed 12 kg/ha into the base fertilizer, then applied 6 kg/ha by fertigation at the seedling and fruit-expansion stages. The customer reported uniform fruit size, high yield and better shelf life. |
Why Buyers Work With Tianjin Agritech Bioindustry
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◆ Marine biostimulant roots Operates under KG Biotechnology Group, with origins in the China Seaweed Association's Institute of Science and Technology. |
◆ Engineering and lab depth Senior engineers with 30+ years in biostimulant fertilizers, an in-house laboratory, seaweed extraction and drying lines, and formulation tanks for liquids and powders. |
◆ OEM/ODM and export terms Serves partners in the EU, Latin America, the Middle East and Asia. Ships by sea, air or express; accepts T/T, L/C, PayPal and credit card. |
Frequently Asked Questions
▸ What is the foliar dilution for seaweed extract powder on vegetables?
The Seaweed Extract Algamas label lists 500-800 g/ha diluted 1:3000 for vegetables. The first spray goes on at the six-leaf stage, with follow-ups at early bloom and first fruit set.
▸ Is the seaweed extract flake OMRI listed?
An OMRI listing certificate for Seaweed Extract Algamas is shown on its product page, and a separate OMRI-listed seaweed extract flake product is listed in the catalog. Ask the team for the current certificate copy before you register or label it.
▸ How do I use amino acid fertilizer as a seed treatment?
Soak seeds in a 0.1%-0.3% solution for 6-12 hours. The manufacturer reports germination 1-3 days earlier and a 10%-30% higher emergence rate; verify this on your own seed lots.
▸ Can potassium humate clog drip irrigation lines?
It can if dosed directly. The product page advises preparing a mother liquid for drip irrigation and avoiding mixes with strong alkaline pesticides such as Bordeaux mixture. On saline-alkali land, keep a single dose at or below 25 kg/ha.
▸ How are Seaweed Extract Algamas and potassium humate packed?
Both list 1 kg bags, 20 bags per carton. Cartons of 20 kg are stacked 72 per pallet, and potassium humate is also offered in 1000 kg bags.
▸ Does Tianjin Agritech Bioindustry offer an OEM biostimulant service?
Yes. The OEM/ODM service follows four steps: needs discussion, production, three-stage inspection with packaging to your specification, and delivery within the contract timeframe.
Seaweed extract, amino acid fertilizer and potassium humate are complementary tools, not competitors. Start from the stress you need to manage, trial one block, and scale the product that shows results. Browse the full crop nutrition range, or read our guide on amino acids and protein.
Need a quotation or a biostimulant formulation for your market?
Email yangsc@agritechsolution.com or WhatsApp +86 158 1040 7523 with your crop, region and target dose.
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