Mineral Source Potassium Fulvate Flakes I
55% fulvic acid · 2–4 mm flake · 100% water soluble · near-zero dust
K₂O 12% min
100% water soluble
Code JFHA-KFA-F
The Liquid-Formulation Standard — Low Dust, Free Flowing, Made to Dissolve
Product Overview
Mineral Source Potassium Fulvate is JINGFENG’s potassium-rich humate extracted from leonardite, a young oxidized lignite rich in humic acid, used worldwide as a fertilizer raw material and plant biostimulant.
Mineral Source Potassium Fulvate Flakes I is our 2–4 mm potassium fulvate flakes grade built for liquid fertilizer production and water-run application. Identical in chemistry to Powder I — 55% fulvic acid, 12% K₂O, 100% water solubility — it differs in everything that matters on a production floor: almost no dust, excellent flow through dosing equipment, and no caking in the bag during long sea freight.
These potassium fulvate flakes are derived from mineral-source leonardite, a young oxidized lignite rich in humic acid. Flakes are the grade European and Middle Eastern liquid-feed plants ask for by name — they pour cleanly from a 25 kg bag into a mixing tank without a dust cloud, and they will not bridge or rat-hole in a hopper.
The trade-off is honest and worth stating plainly: flakes dissolve more slowly than powder and need proper agitation. Give them a working stir and they go completely clear — leave them to sit in still water and you will be waiting.
Used at 5–10% of a liquid formulation, or dissolved on farm and run through the irrigation water, Flakes I delivers the same agronomic punch as the powder with a far more pleasant handling experience.
Key Benefits
Near-zero dust
2–4 mm flakes weigh enough not to become airborne. Operators can charge a tank without a dust mask, and your blending hall stays cleaner.
Free-flowing, no caking
Flakes do not compact in the bag. They pour and meter predictably through screw feeders and loss-in-weight dosers — important when your formula is dosed automatically.
Survives long sea freight
Low surface area means less moisture pickup in a container. Flakes arrive as loose flakes, not as a solidified block.
55% fulvic acid guaranteed
The most active carbon fraction — short molecular chain, rapid uptake by roots and foliage.
100% soluble with agitation
No residue left in the tank, no sediment on the bottom, no blocked emitters — provided you stir properly (see the three steps below).
Hard-water and UAN stable
Flocculation limit 350 mg CaO/L; stays in solution in calcium-rich water and in UAN blends.
Technical Specification
| Parameter | Specification |
|---|---|
| Appearance | Black flake, 2–4 mm |
| Product code | JFHA-KFA-F |
| Fulvic acid (dry basis) | 55.0% min |
| Humic acid (dry basis) | 50.0% min |
| Potassium as K₂O (dry basis) | 12.0% min |
| Water solubility (dry basis) | 100% |
| Flocculation limit | 350 mg CaO per 1 L water (CaCl₂ solution) |
| pH (1:100) | 9.0 – 10.0 |
| Moisture | ≤ 15.0% |
| Heavy metals (Pb, As) | Not detected (< 0.0003 ppm), GB 18877-2009 |
| Test methods | HG/T 3278-2018, HG/T 5334-2018, GB/T 33804-2017 |
Specification values are guaranteed minimums on a dry basis. A batch-specific Certificate of Analysis accompanies every shipment.
Form & Solubility
Form: black potassium fulvate flakes, 2–4 mm, glossy fracture surface, free-flowing.
In water — read this part. Flakes I is 100% soluble, but flake geometry means each particle must be swept by moving water to dissolve. In still water it settles and dissolves slowly. Follow the three steps and you get a clear solution in 5–10 minutes:
- Pre-dissolve — charge the flakes into a small tank with the water already running. Never fill the tank on top of dry flakes.
- Agitate — keep a mechanical stirrer or recirculation pump running. Agitation, not time, is what dissolves flakes.
- Filter — pass the stock solution through a 100–120 mesh filter before it enters the drip or spray system.
Dust: negligible. Flow: excellent, no bridging. Best for: liquid fertilizer plants, on-farm dissolution tanks, fertigation with a working agitator.
Choosing between the five Type I grades
| Grade | Form | Fulvic acid | Best for | Dissolve speed | Dust |
|---|---|---|---|---|---|
| Powder I | 80–100 mesh powder | 55% min | Compound & bulk-blended NPK, WS fertilizer base | Fastest | Some |
| Flakes I (this product) | 2–4 mm flake | 55% min | Liquid fertilizer, fertigation, water-run | Needs agitation | Almost none |
| Micro Granule I | 2–3 mm hollow granule | 50% min | Premium soluble SKUs, hydroponics, foliar | Seconds, no stirring | None |
| Extruded Granules I | 2–4 mm extruded granule | 50% min | Dry blending with granular NPK, broadcasting | Slow (soil moisture) | None |
| Sodium-Free Flakes I | 2–3 mm shiny flake | 50% min | Sodium-sensitive crops, closed hydroponic systems | Needs agitation | Almost none |
Applications & Dosage
| Application | How to use | Rate |
|---|---|---|
| Liquid fertilizer production | Charge into the mixing tank at 5–10% of formula weight under constant agitation. Compatible with UAN, MAP solution and chelated trace elements. | 5–10% of formula |
| Fertigation / water-run application | Pre-dissolve in a small tank with agitation, filter, then meter into the irrigation line. Never add dry flakes straight into the filter station. | 12–18 kg/ha |
| Foliar spray | Dilute 1:1200–1:2000, spray both leaf surfaces early morning or late afternoon. | 4.5–9 kg/ha |
| UAN blending | Mix at 1:50–1:80 with UAN solution under agitation to build a stable nitrogen-humic liquid fertilizer. | 15–30 kg/ha |
| Base application with N/P | Broadcast with the basal dose; 5–10 kg/ha alongside nitrogen and phosphate. | 5–10 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 bag with inner PE liner |
| 20 kg / 25 kg | Colour-printed PP/PE bag with inner liner — private label ready |
| 1000–1100 kg | Jumbo bag with discharge spout |
Storage: Store in a cool, dry, well-ventilated place and reseal opened bags. Flakes are less hygroscopic than powder but will still pick up moisture in humid conditions. Shelf life 3 years under proper storage.
Custom packaging, private-label printing and OEM specifications are available on request. Packaging photos are available in the product gallery.
Successful Cases
Liquid NPK plant, Netherlands
Uses Flakes I as the humic base of a UAN-compatible liquid feed. The plant manager cites dust-free charging and clean tank walls as the reason they switched from a generic flake.
Explore agriculture applications →
Agriculture · Fertigation
Citrus fertigation co-operative, Spain
Dissolving 15 kg/ha per cycle in very hard water. Emitter clogging that had plagued them with standard humate stopped completely after the switch.
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Agriculture · Fertigation
Vegetable grower group, Egypt
Pre-dissolve tank with recirculation pump, 15 kg/ha every 10 days on tomato and pepper. Reported stronger root mass at transplant and improved fruit set.
Explore agriculture applications →
Full case studies with crop data are published in our application sectors.
Frequently Asked Questions
Do flakes really take longer to dissolve than powder?
Yes, and we would rather tell you than have you find out. Powder wets out in seconds; flakes need 5–10 minutes of active agitation. If your process cannot provide agitation, order Powder I or Micro Granule I instead — both dissolve faster.
Can I put the flakes straight into my drip system?
Please don’t. Undissolved particles will collect at the filter and, worse, in the emitters. Always pre-dissolve in a separate tank with a running stirrer, then filter into the system. This is the single most common cause of ‘it didn’t dissolve’ complaints and it is entirely avoidable.
Which is better for liquid fertilizer — powder or flakes?
Flakes, in most plants. They charge without dust, do not bridge in the hopper, and store better. Powder is preferable only if your mixer is slow or you have no agitation, because it wets faster.
Is it compatible with UAN and other liquid fertilizers?
Yes. Flakes I stays fully soluble in UAN and blends cleanly with most liquid feeds. As always, run a jar test with your specific formulation before scaling up — that takes five minutes and prevents a very expensive mistake.
Does it arrive caked after a long shipment?
Very rarely, and far less often than powder. The 2–4 mm flake has little surface area to absorb moisture. Bags carry an inner PE liner; keep containers ventilated and the product will arrive loose.
What is the minimum order and lead time?
Stock item. MOQ one pallet for standard packaging; 7–15 days ex-works for repeat specifications. Custom print and private label available.
Do you supply a COA per batch?
Yes — fulvic acid, humic acid, K₂O, pH and heavy metals, all tested against HG/T and GB/T methods. SGS third-party reports are available on request.
Need a quotation or a sample?
Tell us your application, target market and packaging — we will come back with specification, price and lead time.
