Sodium-Free Potassium Fulvate Flakes I
Zero Sodium — The Custom Grade for Sodium-Sensitive Programmes
K₂O 15.0% min
99.0% min soluble
Code JFHA-KFA-F (Sodium-Free)
2–3 mm flake · 50% fulvic acid · 15% K₂O · zero sodium
Product Overview
Mineral Source Potassium Fulvate is JINGFENG’s potassium-rich humate extracted from leonardite, a young oxidized lignite rich in humic acid. It is used worldwide as a fertilizer raw material and plant biostimulant.
Sodium-Free Potassium Fulvate Flakes I is our custom-manufactured grade for programmes where sodium is the enemy. Standard potassium fulvate is extracted with a potassium-sodium alkali blend and can carry residual sodium. This grade is made with a potassium-only route, and the difference shows in the analysis — and in the field.
The numbers are the strongest in the family: 15% K₂O minimum (against 12% in the standard grades) because there is no sodium competing for the exchange sites, alongside 50% fulvic acid and 50% humic acid. The flakes are a glossy 2–3 mm, and solubility measures 99% minimum.
Where does it earn its premium? Sodium-sensitive crops — grapevine, strawberry, avocado, stone fruit, tobacco, potato and most berries, all of which accumulate sodium in leaf tissue and show burn, necrosis or yield loss. Closed and recirculating systems — hydroponics, glasshouse recirculation and any operation re-using drainage water, where sodium has nowhere to escape and builds up season after season. Saline and sodic soils, where adding sodium to an already sodic profile is the last thing the agronomist wants.
This is a made-to-order grade, not a stock item. Minimum quantities and lead times are set per campaign — tell us your programme and we will quote.
Key Benefits
No sodium ions
Manufactured on a potassium-only route, so no sodium is added to soil or solution. Sodium reports available for programmes that require documented verification.
15% K₂O minimum — the highest in the range
With no sodium competing for exchange sites, potassium loading is substantially higher than the standard 12% grades. A genuine nutritional bonus, not just an absence.
50% fulvic acid
High-activity short-chain carbon for rapid root and foliar uptake, guaranteed and COA-verified on every batch.
Safe for closed systems
In hydroponics and recirculating glasshouses sodium accumulates because there is no leaching route. This grade lets you run a fulvic programme without building up the sodium load.
Protects sodium-sensitive crops
Vine, berry, avocado, stone fruit, tobacco and potato all show leaf-tip burn and yield loss from sodium accumulation. This grade removes that risk entirely.
Suited to saline and sodic soils
Adds fulvic acid and potassium without worsening an existing sodium problem — the correct choice for reclamation programmes.
Technical Specification
| Parameter | Specification | Test standard |
|---|---|---|
| Appearance | Black shiny flake, 2–3 mm | Visual |
| Product code | JFHA-KFA-F (Sodium-Free) | — |
| Fulvic acid (dry basis) | 50.0% min | HG/T 5334-2018 |
| Humic acid (dry basis) | 50.0% min | HG/T 3278-2011 |
| Potassium as K₂O (dry basis) | 15.0% min | GB/T 33804-2017 |
| Sodium | None added — potassium-only extraction route | ICP or flame photometry |
| Water solubility (dry basis) | 99.0% min | HG/T 3278-2018 |
| pH (1:100) | 9.0 – 12.0 | GB/T 33804-2017 |
| Flake size | 2–3 mm | Visual |
| Heavy metals (Pb, As, Hg, Cd) | Not detected (< 0.0003 ppm), GB 18877-2009 | GB 18877-2009 |
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?
Specification values are guaranteed minimums on a dry basis. A batch-specific Certificate of Analysis accompanies every shipment.
Form & Solubility
Form: glossy black flakes, 2–3 mm — noticeably shinier than the standard Flakes I, which is the visual cue that you are holding the sodium-free grade.
In water: 100% soluble, and in practice the higher potassium loading makes it wet out a little faster than the standard flake. The same rule still applies though — agitate while it dissolves. Pre-dissolve in a small tank, keep the stirrer running, then filter into the system.
pH note: this grade carries a wider pH window of 9.0–12.0, higher than the 9.0–10.0 of the standard grades. That is a consequence of the potassium-only route. It is completely normal for this product and is not a defect — but if you are blending it into a formulation with a tight pH window, account for it in your buffer calculation.
Availability: made to order. Not a stock grade. Minimum quantity and lead time are agreed per production campaign.
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 |
|---|---|---|
| Sodium-sensitive crops (vine, berry, avocado, stone fruit, tobacco, potato) | Fertigation or foliar through the season, especially on varieties with known sodium sensitivity. | 7.5–15 kg/ha |
| Hydroponics & recirculating glasshouse | Dose into the nutrient loop. No sodium accumulation, which is the whole point in a closed system. | 4.5–12 kg/ha |
| Saline and sodic soil reclamation | Combine with gypsum and leaching programme; adds fulvic and potassium without adding sodium. | 5–10 kg/ha |
| Premium liquid formulation | Build a ‘sodium free’ positioning into a liquid SKU for quality-focused markets. | 5–10% of formula |
| Foliar spray on sensitive foliage | Dilute 1:1500–1:2500; apply early morning or late afternoon. | 3–7.5 kg/ha |
Packaging & Storage
| Pack size | Description |
|---|---|
| 1 kg | Printed aluminium foil bag — trial and sample size |
| 20 kg | Kraft bag with inner liner |
| 25 kg | Woven bag with inner PE liner |
| 1000–1100 kg | Jumbo bag with discharge spout |
Storage: Store sealed in a cool, dry, well-ventilated place. As a made-to-order grade it is produced to your campaign, so order to match your programme window. Shelf life 2 years in unopened original packaging.
Custom packaging, private-label printing and OEM specifications are available on request. Packaging photos are available in the product gallery.
Successful Cases
Vineyard group, Chile
Switched to the sodium-free grade after leaf-tip burn appeared on sensitive clones. Burn symptoms did not recur and the programme continued at full rate.
Explore agriculture applications →
Agriculture · Fertigation
Hydroponic glasshouse, Netherlands
Runs a closed loop with no drain-to-waste. Sodium-free was the only grade their agronomist would approve for continuous dosing.
Explore agriculture applications →
Agriculture · Fertigation
Avocado orchard, Israel
Irrigating with marginal-quality water; needed the fulvic programme without adding to the sodium load. Now a standing annual order.
Explore agriculture applications →
Full case studies with crop data are published in our application sectors.
Frequently Asked Questions
Is it completely sodium free, or just low sodium?
It is manufactured on a potassium-only extraction route, so no sodium is introduced in production. That is why the K₂O guarantee sits at 15% rather than 12% — there is no sodium competing for the exchange sites. If your programme needs documented sodium figures, tell us at enquiry stage and we will provide the applicable test report.
Why is the pH window 9.0–12.0 rather than 9.0–10.0?
A consequence of the potassium-only route — no sodium alkali is used, so the resulting solution sits higher on the pH scale. This is normal for the grade and is not a quality issue. Do account for it if your formulation has a tight pH window.
Which crops really need the sodium-free grade?
Grapevine, strawberry, avocado, stone fruit, tobacco, potato and most berries are the classic cases — they accumulate sodium in leaf tissue and show tip burn, necrosis or yield loss. Also worth specifying for any closed hydroponic system and for saline or sodic soils.
Is it worth the premium over standard Flakes I?
If sodium is not a constraint in your programme, standard Flakes I is the better value — same agronomy, lower cost, in stock. Specify sodium-free when you have sodium-sensitive varieties, a closed system, or a sodic soil profile.
Is it a stock item?
No — it is made to order on a dedicated production campaign. Minimum quantity and lead time are agreed per order. Share your annual volume and we will build a supply plan with you.
Do you supply a COA per batch?
Yes — fulvic acid, humic acid, K₂O, pH and the full heavy metal panel (Pb, As, Hg, Cd), tested to HG/T and GB/T methods.
Can it be used in organic programmes?
Our fulvic acid line holds CERES organic certification to NOP standard. Confirm your target market and programme at enquiry stage and we will attach the current certificate.
Also Available in This Family
Potassium Humic Fulvic Round Granule – 4–6 mm Disc-Granulated
Sodium-Free Potassium Fulvate Flakes II – Zero Sodium, 15% K₂O
Mineral Source Potassium Fulvate Powder II – 30% Fulvic, 60–80 Mesh
Mineral Source Potassium Fulvate Flakes II – 30% Fulvic, 55% Humic Acid
Extruded Potassium Fulvate Granules I – 50% Fulvic Acid, High Strength
Mineral Source Potassium Fulvate Micro Granule I – Instant-Dissolve Hollow Granule
Mineral Source Potassium Fulvate Powder I – 55% Fulvic Acid, 80–100 Mesh
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