15-15-15 Controlled-Release Fertilizer
NPK 15-15-15 Controlled-Release Fertilizer
15-15-15 Controlled-Release Fertilizer
| Product Name: | NPK 15-15-15 Slow-release fertilizer | |
| Category: | Controlled-Release Fertilizer – Products | |
| Nutrient Composition: | Total N – 15%, P₂O₅ – 15%, K₂O – 15% | |
| Coating Technology: | Uniform polymer-coated granules (diffusion-controlled release) | |
| Release Duration: | Usually 30, 60, or 90 days; may last longer if the soil is cooler. | |
| Granule Size: | 2–5 mm (customizable); round, smooth, and uniform | |
| Secondary Nutrients: | Optional: S, Mg, CaO, Fe, Mn, Zn, Cu, Mo, B. | |
| Payment Terms: | T/T, L/C, cash(USD, EUR, RMB) | |
| Certificate: | ISO 22241-1, ISO 9001 standard. |
15% Nitrogen
Total nitrogen 15% (N) of which 5% nitrate nitrogen and 10% ammonium nitrogen (optional)
15% Phosphorus
Total Phosphorus 15% (P) Diammonium phosphate 9%, monoammonium phosphate 4%, calcium superphosphate 2% (optional)
15% Potassium
Total Potassium 15% (K) Potassium Sulfate / Potassium Chloride (optional, prices vary)
Other Elements
Optional: S, Mg, CaO, Fe, Mn, Zn, Cu, Mo, B...
15-15-15 Controlled-Release Fertilizer Description
Risso® 15-15-15 Controlled-Release Fertilizer is a high-performance NPK solution designed for precision nutrient delivery over 30–90 days. With a balanced formulation of 15% Nitrogen (N), 15% Phosphate (P₂O₅), and 15% Potassium (K₂O), this fertilizer is encapsulated in a durable polymer coating to ensure controlled, temperature-responsive release. It improves nutrient use efficiency, reduces application frequency, and promotes uniform crop development across all growth stages.
Key Technical Advantages
Balanced NPK Formula (15-15-15):
Supports strong root growth, vegetative development, and reproductive performance.Advanced Polymer Coating Technology:
Ensures slow, steady nutrient diffusion triggered by soil temperature and moisture.Enhanced Nutrient Use Efficiency (NUE):
Minimizes nutrient leaching, volatilization, and fixation—leading to higher crop uptake.Environmental Compliance:
Reduces nitrate runoff and phosphate loss, supporting sustainable, eco-friendly agriculture.Reduced Labor & Cost:
One-time application covers an entire season, reducing operational input and improving ROI.
Recommended Applications
Suitable For:
Cereal crops, vegetables, fruit trees, turfgrass, ornamentals, greenhouse production, and potted plants.
Typical Application Methods:
Broadcast, side-dress, top-dress, banding, or incorporation into media.
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Field crops: 60–200 kg/ha
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Turf & lawn: 3–6 kg/100 m²
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Nursery/containers: 2–10 g per liter of substrate
Exact dosage should be based on soil testing and crop-specific requirements.
Technical Specifications
| Parameter | Specification |
|---|---|
| N-P₂O₅-K₂O Content | 15% – 15% – 15% |
| Total Nutrients (Min.) | ≥ 45% |
| Granule Size | 2–5 mm (uniform round shape) |
| Coating Material | Polymer resin (diffusion-controlled) |
| Release Longevity | 30, 60, or 90 days (temperature-based) |
| Optional Additives | S, Mg, CaO, Fe, Zn, B, Mn, Mo, Cu |
| Moisture Content | ≤ 1.5% |
| Water Insoluble Matter | ≤ 5% |
| Heavy Metals & Chloride | Meets global fertilizer standards |
Packaging & Customization
Standard Packs: 9.5kg, 25 kg PE-lined woven bags / 500–1000 kg jumbo bags
Shelf Life: 2 years in cool, dry storage
Custom Options:
Tailored NPK ratios (e.g., 14-14-14, 16-16-16)
Extended or shortened release periods
Micronutrient enrichment
OEM/private label available for distributors
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Why Choose Risso® 15-15-15 CRF?
Backed by Agronomic Expertise:
Designed by professionals, field-tested globally.Controlled Nutrient Delivery:
Predictable release synchronized with crop nutrient demands.Global Performance:
Proven results across Asia, Europe, Africa, and Latin America.Sustainable Crop Management:
Ideal for modern agriculture focused on productivity and environmental responsibility.
