KingCote SeriesControlled-Release NPK Compound Fertilizer
One application, nutrients delivered all season long.
Key product advantages
Whole-cycle nutrient supply: Continuously releases nutrients and provides precise nutrition according to crop needs during each growth stage, avoiding seedling-stage salt stress while ensuring nutrients are available at maturity.
Fewer applications, lower cost: Only a single fertilization is required, reducing nutrient loss, improving nutrient use efficiency (NUE), and cutting both fertilizer volume and application labor.
Even, uniform growth: Slow, steady nutrient release lets crops grow more evenly while maintaining or increasing yield with less fertilizer used overall.
Product description
Designed to provide adequate nutrients throughout the crop growth cycle, increase yield, reduce nutrient loss and simplify fertilization.
Promote absorption and resistance
Improve root adhesion, increase trace element absorption, prevent crop deficiencies, and enhance crop photosynthesis.
Reasonable nutrition formula
The nitrogen, phosphorus, and potassium ratio is reasonable, the particles are uniform, the nutrient content is sufficient, and the fertilizer effect is more durable.
Increase production and income
The quality is excellent, the quality of agricultural products is good, and the effect of increasing crop yield is remarkable.
Available in low chloride or MOP base
Potassium sourced from SOP (low chloride) or MOP, selectable to match crop chloride sensitivity.
Fast-acting nitrogen source
Nitrogen supplied from both ammonium and nitrate forms for a fast-acting response.
Perfect granular, high available phosphate
90% of granules fall within 1–4mm, with 80% water-soluble phosphate and even nutrients in each granule.
Field results: improved corn nutrient absorption and reduced bare-tip rate, with average yield increases of 8.3%, 9.8% and 12.5% on corn, rice and tomato respectively.
Specification
Controlled-release NPK is available across a range of N-P-K ratios.
| Formula (N-P-K) | Total-N% | NO3% | NH4% | UREA-N% | P2O5% | K2O% |
|---|---|---|---|---|---|---|
| 14-14-14 | 14 | 4.6 | 9.4 | – | 14 | 14 |
| 13-13-13 | 13 | 4 | 9 | – | 13 | 13 |
| 20-8-10 | 20 | 7 | 13 | – | 8 | 10 |
| 19-7-9 | 19 | 7 | 12 | – | 7 | 9 |
| 18-7-8 | 18 | 6.3 | 11.7 | – | 7 | 8 |
| 14-5-23 | 14 | 4.6 | 9.4 | – | 5 | 23 |
| 13-4-22 | 13 | 4 | 9 | – | 4 | 22 |
| * Other NPK formulations available upon request | ||||||
Usage scenarios
Where controlled-release nutrition delivers the most value.
High-value horticulture
Widely used for container-grown plants (nursery stock, ornamentals, vegetables), greenhouse crops, and turfgrass (golf courses, sports fields, lawns) where precise nutrition and reduced labor are critical.
Large-scale field crops
Increasingly adopted for staple crops like corn, rice, and wheat, especially in regions prone to leaching or where labor costs are high, improving efficiency and yield stability.
Sandy soils and high rainfall areas
Particularly beneficial in soils with low nutrient retention or areas with heavy rainfall, where conventional fertilizers are easily washed away.
Long-season crops and perennials
Ideal for fruit trees, vineyards, and other crops with extended growing seasons needing sustained nutrition.
Precision agriculture and reduced access areas
Useful where frequent field access for top-dressing is difficult, expensive, or undesirable. Simplifies fertilization programs.
Request technical documentation
Need full chemical specifications, alternative N-P-K formulas, or Material Safety Data Sheets (MSDS) for our controlled-release NPK? Get in touch with our technical team directly.
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