Potassium Humate Round Granule
A True Sphere — Uniform Spreading and a Clean, Premium Appearance
2–4 mm spherical granule · 40% humic acid · 2–5% K₂O · 80% soluble · uniform spreading
Product Overview
Potassium Humate Round Granule is produced on a disc granulator to give a genuinely spherical 2–4 mm granule at 40% minimum humic acid, 2–5% K₂O and 80% minimum water solubility.
Roundness is the whole point of this grade, and it buys three things. Uniform spreading — a true sphere flows consistently through a spinner or pneumatic spreader, giving an even distribution pattern, where an irregular particle gives streaks. Clean blending — the sphere matches the size band of standard granular NPK, so it stays distributed rather than segregating. And appearance — a uniform round black granule looks like a finished fertiliser rather than a raw material, which matters in a retail or branded product.
The specification is close to our Compacted Granules grade. The difference is shape and the process behind it: disc granulation with a binder produces the sphere, roller compaction without a binder produces a harder oval. Choose Round Granule where roundness, uniformity and presentation matter; choose Compacted where hardness and blend interlock matter more.
Potassium Humate Round Granule is a base-fertilizer grade — drilled, broadcast or blended, releasing its humic fraction into soil moisture rather than dissolving in a tank.
Key Benefits
True spherical granule for even spreading
A real sphere flows consistently through a spreader and gives an even pattern. Irregular particles bridge and streak, and the grower sees it in the crop.
Matches granular NPK sizing
At 2–4 mm the granule sits in the same size band as standard MAP, DAP and urea, so it stays distributed through blending and transport rather than segregating out.
40% humic acid, 80% soluble
A solid granular analysis. Most of the humic fraction releases into soil moisture, with a small insoluble residue that is normal for a granular grade.
Uniform, premium appearance
Consistent round black granules look like a finished fertiliser. Useful for branded and bagged product where appearance carries value.
Low dust and clean handling
Essentially dust-free. Better working conditions and no product lost to wind at the spreader.
Handles the full logistics chain
Survives blending, bagging, palletising and spreading without breaking down into fines under normal handling.
Technical Specification
| Parameter | Specification | Test standard |
|---|---|---|
| Humic acid (dry basis) | 40.0% min | HG/T 3278-2011 |
| Potassium as K₂O (dry basis) | 2.0 – 5.0% | GB/T 33804-2017 |
| Water solubility (dry basis) | 80.0% min | HG/T 3278-2018 |
| Moisture | 20.0% max | HG/T 3278-2011 |
| pH (1:100) | 9.0 – 10.0 | GB/T 33804-2017 |
| Granule size | 2 – 4 mm | Sieve method |
| Granule shape | Round / spherical | Visual |
| Appearance | Black round granule | Visual |
| Product code | JFHA-KHA-G | — |
Specification values are guaranteed minimums on a dry basis, taken from the batch Certificate of Analysis and tested against the stated Chinese industry standards. Every shipment travels with its own COA stating the tested values.
Need the full Certificate of Analysis, MSDS, or TDS for your formulation or tender file?
Request COA / MSDS / TDSForm & Solubility
Form: uniform black spherical granules, 2–4 mm, produced on a disc granulator. Smooth, round, matte to slightly glossy. Dust-free.
In water: 80% minimum soluble. The granule softens, breaks down and releases most of its humic fraction, leaving a small residue. This is a soil-application grade — if your route is a tank, use a fully soluble powder or flake.
Hardness: adequate for normal handling — blending, bagging, conveying, spreading. If your line is particularly aggressive, or you are blending with urea, the Compacted Granules grade is harder and the better choice.
In the blender: the sphere matches granular NPK closely in size, so distribution through the blend is good.
Which potassium humate grade fits your process?
| Grade | Form | Humic acid | K₂O | Solubility | Best for |
|---|---|---|---|---|---|
| Potassium Humate Powder | 60–80 mesh powder | 60% min | 10% min | 100% | Fertigation, foliar, liquid fertilizer production |
| Potassium Humate Flakes | 2–4 mm flake | 60% min | 10–12% | 100% | Broadcast, fertigation, liquid production |
| Sodium-Free Potassium Humate | Flake or powder | 65% min | 15% min | 100% | Hydroponics, closed loops, saline–sodic soil |
| Potassium Humate Shiny Crystal | 1–2 / 2–4 mm crystal | 65% min | 10% min | 97% min | Premium soluble grades, retail packing |
| Big Shiny Flakes | 2–4 mm shiny flake | 50% min | 10–12% | 100% | Retail bagged product, visual premium grades |
| Compacted Granules | 2–4 mm oval granule | 40% min | 2–5% | 80% min | Base fertilizer, blending, broadcasting |
| Round Granule (this product) | 2–4 mm round granule | 40% min | 2–5% | 80% min | Base fertilizer, mechanised sowing |
Soluble grades (powder, flakes, crystal) dissolve for fertigation, foliar and liquid production. Granular grades (compacted, round) are built for soil placement, blending and mechanised sowing. Every grade ships with a batch COA and the same heavy-metal declaration (Pb, As, Hg, Cd, Cr below detection, GB 18877).
Applications & Dosage
A base-fertilizer and soil-placement grade, built for mechanical application:
| Application | How to use | Rate |
|---|---|---|
| Base fertilizer, mechanised sowing | Drill with the seeder and mix into soil at 10–15 cm depth. Avoid direct seed contact. | 750–1200 kg/ha |
| Base fertilizer, manual broadcasting | Spread evenly and plough in, alone or with other base fertilizers. | 600–1050 kg/ha |
| Blending with granular NPK | Blend with urea, MAP, DAP or MOP at matched sizing. | 5–15% of blend |
| Topdressing by root irrigation | Dissolve, dilute 500–800 times, stir, filter and irrigate to the root zone. | 300–450 kg/ha per application |
| Orchard and vineyard | Band or broadcast under the canopy during the active root period. | 500 g – 2 kg per plant |
| Turf, pasture and amenity | Broadcast for soil improvement where an even spread pattern matters. | 400–800 kg/ha |
Packaging & Storage
| Pack size | Description |
|---|---|
| 1 kg / 5 kg / 10 kg | Printed aluminium foil bag — retail and sample size |
| 20 kg / 25 kg | Woven PP bag with inner PE liner — standard export packing |
| 1000–1100 kg | Jumbo bag with discharge spout, 4 lifting loops |
| Custom | Private-label printed bag, OEM specification, retail sizes on request |
Storage: Store under cover in a cool, dry, ventilated place, on pallets and off bare concrete. At up to 20% moisture, the granule will absorb more if it sits on a damp floor. Sustained wetting softens and consolidates the granules into a mass, which does not destroy the humic acid but makes the material unspreadable. Keep it dry and it handles well for years. Shelf life: 24 months in original, unopened packaging.
Custom packaging, private-label printing and OEM specifications are available on request. Packaging photos are available in the product gallery.
Successful Cases
Wheat and maize operation, Romania
Broadcasts at roughly 800 kg/ha ahead of ploughing on large-scale arable ground. Switched from an irregular granular humate because of spread pattern — the round granule gives visibly more even distribution from their spinner spreader, which they were seeing as uneven crop colour in the previous season.
Explore potassium humate applications → Agriculture · Base FertilizerFertilizer brand, Southeast Asia
Uses the round granule at 20% of formulation in a branded granular fertilizer. Chose it specifically for appearance: uniform round black granules read as a finished fertiliser product to their customers, where an irregular or dusty material looked like a raw material despite identical analysis.
Explore potassium humate applications →Full case studies with crop data are published in our application sectors.
Frequently Asked Questions
Round Granule or Compacted Granules — which one?
The specification is close: both 2–4 mm, 40% humic acid, 2–5% K₂O, 80% solubility. Round Granule is disc-granulated into a true sphere using a binder — better for spread uniformity and appearance. Compacted is roller-compressed into a harder oval with no binder — better for hard handling and blend interlock. If presentation and even spreading are your priorities, buy round; if hardness and rough handling are, buy compacted.
Can it be used through drip irrigation?
It can be dissolved, diluted 500–800 times, filtered and applied by root irrigation, which is a listed use. But if fertigation is your main route, a fully soluble powder or flake is the right product — a granular grade will always carry some residue and is not designed for fine emitters.
Will it segregate when blended with NPK?
Less than an irregular particle will, because the 2–4 mm sphere sits in the same size band as standard granular NPK. That said, every blend line behaves differently — run a segregation test on your own equipment before committing to a large run. We can supply a sample for that trial.
Is direct contact with seed safe?
Avoid it. Drill so the granule mixes into soil at 10–15 cm depth rather than sitting with the seed. The material is alkaline at pH 9.0–10.0, and concentrated humate against seed can affect germination. This is standard practice for any humic base fertilizer, not a peculiarity of this grade.
What happens to the 20% that is not soluble?
It remains as a fine insoluble humic residue in the soil. It is not a problem — insoluble humic material is a legitimate soil amendment in its own right and continues to contribute to soil organic matter and structure. It is only a problem if you put it through a filter or an emitter, which is why this is a soil grade.
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