Soil conditioners and biostimulants
Humic-acid soil conditioners and biostimulants for tropical plantation soils: SoilBoost EA and Hyacinth Plus. They improve soil structure, nutrient retention, and fertilizer efficiency. Request a q...
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Soil SolutionsHyacinth PlusHyacinth Plus is a premium organic plant supplement and soil amendment, derived from water hyacinth, an abundant aquatic plant transformed into a powerful soil enhancer.
What was once an overlooked aquatic plant, is now the foundation of a powerful agricultural innovation. Hyacinth Plus was born from a vision to transform nature's excess into nature's advantage. By harvesting fully decomposed water hyacinth directly from the lake, we unlocked the hidden potential, creating a premium soil conditioner that enriches soil, nurtures crops and restores ecological balance.
Designed for high-performance farming, it delivers consistent results across both organic and commercial agriculture. For enhanced soil conditioning, pair Hyacinth Plus with SoilBoost EA for comprehensive nutrient retention and structure improvement.
Key Benefits of Hyacinth Plus
Improves Soil Structure
Enhances soil aeration and porosity
Improves soil aggregation and reduces compaction
Supports stronger root penetration
Enhances Nutrient Retention
Contains humic substances that increase soil cation exchange capacity (CEC)
Improves nutrient availability and uptake efficiency
Promotes Healthy Root Development
Encourages deeper and stronger root systems
Improves seedling establishment and early crop vigor
Improves Soil Biological Activity
Supports beneficial soil microorganisms
Enhances organic matter decomposition and nutrient cycling
Improves Soil Moisture Retention
Helps soil hold water longer
Reduces plant stress during dry conditions
Supports Sustainable Agriculture
Produced from recycled aquatic biomass
Promotes ecological balance and soil regeneration
Application Guide
Rice
Growth stage: Broadcast during transplanting.
Application rate: 500kg/ha. Add as needed.
Corn
Growth stage: Spread along the furrow line during sowing.
Application rate: 500kg/ha. Add as needed.
Plantation Crops
(Banana, Coconut, Oil Palm, Mango, Pineapple, Sugarcane, Tobacco)
Established plants
Application rate: 2–3 tons/ha. Add as needed.
Seedling stage
Application rate: 1–3 kg per plant. Increase depending on plant size.
Solanaceous Crops
(Tomato, Eggplant)
Application stage: During or after planting
Application rate: 500 g – 1 kg/plant. Add as needed
Bulb Crops
(Onion, Garlic)
Application stage: During or after planting
Application rate: 500 g – 1 kg/plant. Add as needed
Crucifer Crops
(Cabbage, Cauliflower)
Application stage: During or after planting
Application rate: 500 g – 1 kg/plant. Add as needed
Cucurbits
(Cucumber, Squash, Melons, Gourds)
Application stage: During or after planting
Application rate: 500 g – 1 kg/plant. Add as needed
Root Crops
(Sweet Potato, Radish)
Application stage: During or after planting
Application rate: 500 g – 1 kg/plant. Add as needed
How to Order
This product is available by quotation only. Pricing depends on order volume, destination, and application requirements.
Request a Quote: Submit an inquiry or WhatsApp us directly.
Export / International: We ship globally. Contact us for CIF/FOB pricing and export documentation.
Request Quote
Soil SolutionsSoilBoost EAWHAT IS SOILBOOST EA?
SoilBoost EA is a concentrated humic acid soil conditioner manufactured exclusively by Chemiseed Sdn. Bhd., Malaysia (it is not sold by any other company). Formulated for tropical plantation crops. Derived from leonardite, it delivers active humic and fulvic molecules directly to the root zone, improving nutrient uptake efficiency, soil structure, and biological activity across oil palm, rubber, cacao, durian, and associated crops.
SOURCE AND KEY INGREDIENTS
SoilBoost EA is produced from 100% Leonardite ore, the richest natural source of humic substances. Composition: leonardite-derived humic acid, an active fulvic fraction, approximately 0.45% sulphur, pH 3.84, plus chelated micronutrients (iron, zinc, copper). Humic acid raises the soil cation exchange capacity and builds structure, while the mobile fulvic fraction carries micronutrients into the plant. Learn how Leonardite humic acid works.
THE SCIENCE
A 2024 meta-analysis (Ma et al., Agronomy, MDPI) covering multiple crops and environments found that humic acid amendment delivers an average +12% crop yield uplift, +27% improvement in nitrogen use efficiency, and +17% increase in nitrogen uptake. A second landmark meta-analysis (Rose et al., 2014, Advances in Agronomy) across hundreds of studies found average shoot dry weight increases of ~22% and root dry weight increases of ~21% in response to humic substances, with stronger responses (~28%) under high-stress conditions.
HOW IT WORKS
SoilBoost EA operates through four proven biochemical pathways:
Nutrient chelation, forms stable, water-soluble complexes with iron, zinc, copper, and other micronutrients, keeping them bioavailable rather than precipitated
CEC enhancement, increases the soil's cation exchange capacity, preventing leaching of potassium, calcium, magnesium, and ammonium during heavy rainfall
Gene upregulation, activates nitrate absorption genes (NRT2.1, MHA2) in plant roots, increasing nitrogen uptake efficiency at the cellular level
Organo-mineral complexation, physically protects labile soil carbon from rapid decomposition, building long-term soil fertility
OPTIMAL CONDITIONS
Responses are strongest in soils with moderate pH (6-8), annual rainfall above 300 mm, and low baseline nitrogen, conditions that align precisely with tropical plantation soils across Southeast Asia.
APPLICATION
Soil drench, fertigation, or foliar application depending on crop stage and target outcome. Best results when used in combination with established leguminous cover crops, which provide the organic substrate for humic molecule activation.
Research-backed performance
EXCLUSIVE MANUFACTURERSoilBoost EA is manufactured exclusively by Chemiseed Sdn. Bhd., Malaysia. Kudzu Seeds Trading, its sister company, offers SoilBoost EA to its markets. SoilBoost EA is not available from any other supplier.
GLOBAL AVAILABILITYAvailable for export to tropical regions worldwide, including Southeast Asia, Latin America, Africa, South Asia, and the Pacific Islands. All shipments include phytosanitary certification (ISPM 7 compliant). Contact us for bulk pricing and export documentation.
Peer-reviewed evidence
By the numbers
Evidence from two landmark meta-analyses covering hundreds of peer-reviewed studies across crops, climates, and soil types.
+12%
Average crop yield uplift
Meta-analytic average across multiple crops and environments. Stronger responses under stress conditions.
Ma et al. 2024, Agronomy (MDPI), Humic Acid Meta-Analysis
+27%
Nitrogen use efficiency
Humic acid amendment consistently improves how much of your applied nitrogen is actually taken up by the crop.
Ma et al. 2024, Agronomy (MDPI), Humic Acid Meta-Analysis
+17%
Total nitrogen uptake
Average increase in nitrogen uptake across crops, directly reducing synthetic fertiliser dependency.
Ma et al. 2024, Agronomy (MDPI), Humic Acid Meta-Analysis
~22%
Shoot dry weight increase
Random-effects meta-analysis across hundreds of studies and crop types worldwide.
Rose et al. 2014, Advances in Agronomy (Vol. 124)
~21%
Root dry weight increase
Larger, denser root systems mean better nutrient scavenging and drought resilience across plantation crops.
Rose et al. 2014, Advances in Agronomy (Vol. 124)
4
Proven mechanisms of action
Nutrient chelation (Fe, Zn, Cu) · CEC enhancement · Gene upregulation (NRT2.1, MHA2) · Organo-mineral complexation.
Ma et al. 2024 / Rose et al. 2014, Peer-reviewed meta-analyses
Humic acid responses are strongest in soils with moderate pH (6-8), annual rainfall >300 mm, and low baseline nitrogen, conditions aligned with tropical plantation agriculture. View Ma et al. 2024 meta-analysis →
Field trial: FPA EUP 3227
OFFICIAL EFFICACY TRIAL (PHILIPPINES)
SoilBoost EA was evaluated in an independent bioefficacy trial conducted for Philippine product registration under the Fertilizer and Pesticide Authority (FPA Experimental Use Permit No. 3227), registered to Kudzu Seeds Trading. The randomized complete block trial (6 treatments, 3 replications) was run by an FPA-accredited researcher at the PCA-Davao Research Center on tissue-cultured Lacatan banana seedlings, and was certified as following Good Agricultural Practices.
What the trial found (3 months after application, all differences statistically significant at p < 0.01):
SoilBoost EA used on its own produced taller seedlings with greater girth and more leaves than the unfertilized control.
The strongest growth came from combining a balanced fertilizer program with SoilBoost EA, confirming its role as a soil conditioner that helps fertilizer work harder, not a fertilizer replacement.
SoilBoost EA raised soil organic matter, available phosphorus and potassium, lifted soil pH, and improved the soil's water-holding capacity (88.7% versus 80.0% in the untreated control), with soil drying out more slowly.
A summary of this FPA trial is available on request. See the Evidence Hub for the full data tables, or contact our technical team.
Related Resources
Leonardite Humic Acid: Source, Composition, and How It Works
SoilBoost EA for Durian and Tropical Fruit Trees
How to Pair SoilBoost EA with Cover Crops for Maximum Soil Health
Browse All Cover Crop Seeds
Frequently Asked Questions
Plan with our free calculators
Work out exactly how much SoilBoost EA to apply by crop, area, and method with the SoilBoost EA Application Rate Calculator. Browse all our plantation tools.
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