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Free Sample, Bulk NPK 15-15-15 Compound Fertilizer. Customizable OEM Color: Available in white, red, yellow, or customized OEM colors. High Purity Formula: 100% purity with N-P2O5-K2O formula for optimal plant nutrition. Quick Release Type: Fast-acting granular or powder fertilizer for immediate crop uptake. Versatile Application: Suitable for vegetables, flowers, and fruit cultivation. Low Moisture Content: Moisture content strictly controlled below 2% for quality assurance. ISO Certified: Manufactured under ISO certification standards for safety and quality. Flexible Packaging: Available in 9.9kg PP woven neutral bags or customized requests. Sample Availability: Free samples available for bulk NPK 15-15-15 compound fertilizer.