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NPK21-21-21s

NPK21-21-21s

NPK21-21-21+S is a premium-grade, fully water-soluble fertilizer with a perfectly balanced 1:1:1 ratio of Nitrogen (21%), Phosphorus (21%), and Potassium (21%), enriched with Sulfur (S). This high-purity formula is designed for maximum efficiency in fertigation and foliar feeding systems. The balanced nutrient profile supports all stages of plant growth, from vegetative development to flowering and fruiting. The addition of sulfur is crucial for protein synthesis and chlorophyll production. Ideal for high-value crops in greenhouses and open fields, NPK21-21-21+S ensures rapid nutrient uptake, promoting vigorous growth, high yields, and superior crop quality.
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Product Details

2.1 Key Features
Perfectly Balanced Ratio: The equal 21-21-21 NPK ratio provides a complete and harmonious nutrient supply, preventing any single element from limiting growth.
High Water Solubility: Dissolves completely and rapidly in water, leaving no residue, making it ideal for drip irrigation, sprinkler systems, and foliar sprays.
Sulfur Enrichment: Contains essential sulfur, which is a key component of amino acids and vitamins, enhancing the effectiveness of nitrogen and improving overall plant metabolism.
Chloride-Free & Low Salt Index: Safe for sensitive crops and minimizes the risk of root burn or soil salinity buildup.

Versatile Application: Suitable for a wide range of crops and can be used throughout the entire growth cycle.

2.2 Primary Functions and Benefits

FunctionBenefit to PlantsAgronomic Advantage
Complete NutritionProvides all three primary macronutrients in equal, high concentrations.Supports balanced growth, eliminating the guesswork in nutrient management during rapid growth phases.
Rapid CorrectionNutrients are immediately available for plant uptake.Quickly corrects nutrient deficiencies, leading to fast recovery and visible improvements in plant health.
Sulfur SynergySulfur improves nitrogen utilization and is vital for chlorophyll formation.Enhances photosynthetic efficiency, leading to darker green leaves and improved plant vigor.
Stress MitigationThe balanced potassium content improves plant resilience.Increases tolerance to environmental stresses such as drought, disease, and temperature fluctuations.

2.3 Target Crops and Application Scenarios
Greenhouse Crops: Tomatoes, cucumbers, peppers, lettuce, herbs - Used as the main fertilizer in hydroponic systems or substrate cultivation, applied with every irrigation.
High-Value Field Crops: Strawberries, melons, potatoes, tobacco - Ideal for fertigation during critical growth stages to maximize yield and quality.
Fruit Trees & Vineyards: Citrus, grapes, apples - Applied through drip systems during fruit set and development to ensure uniform fruit size and quality.
Ornamentals & Nurseries: Promotes lush, green foliage and strong root systems in flowers and ornamental plants.
2.4 Application Guidelines (General)
Fertigation (Recommended):
Dilution: Dissolve 5-10 kg of NPK21-21-21+S in 1000 liters of water.
Application Rate: Apply 5-15 kg per hectare per application. Frequency can range from weekly to daily, depending on the crop's growth stage and the irrigation schedule.
Foliar Spray:
Dilution: Dissolve 2-3 kg in 1000 liters of water.
Spray: Apply evenly to leaves until runoff. Best done in the early morning or late afternoon to maximize absorption.
Compatibility: Can be mixed with most other water-soluble fertilizers and agrochemicals, but a jar test is recommended before large-scale mixing.
Nutrient Role Summary
FeatureNPK21-21-21+SNPK20-20-20NPK15-15-15
Nutrient ConcentrationHigher (21% each)High (20% each)Standard (15% each)
Sulfur ContentIncludedUsually not includedUsually not included
Primary UseHigh-efficiency fertigation, quick correctionGeneral-purpose soluble fertilizerGeneral-purpose, cost-effective soluble fertilizer
Key AdvantageMaximum nutrient density per kg, plus sulfur benefitsWidely available, standard for many cropsLower cost, suitable for less intensive applications

Note: NPK21-21-21+S is a high-performance fertilizer designed for precision agriculture. Its high solubility and balanced formula make it an excellent choice for farmers and growers who require precise control over their crop nutrition to achieve optimal results. The inclusion of sulfur adds significant value, making it a comprehensive solution for modern, high-yield farming systems.

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FAQ

Q1: What international standards do your products and services comply with?

A1: Our products fully comply with international standards such as REACH, MSDS, and COA, and we strictly implement the ISO9001 quality management system. We can also provide third-party testing reports (SGS, BV, etc.) according to customer needs.


Q2: How long does it take for goods to be delivered to my country?
A2: The delivery time depends on the transport mode and destination country. Generally, sea transport takes 15-30 days, air transport takes 3-7 days, and we will optimize the transport route to shorten the delivery time as much as possible.


Can you provide customs clearance services for dangerous chemicals?
A3: Yes. Our team is proficient in the customs clearance procedures for dangerous chemicals in various countries, and can provide professional compliant declaration and customs clearance services to ensure smooth customs clearance.


Q4: Do you provide customized product and service solutions?
A4: Yes. We can provide personalized product customization and export service solutions according to your specific needs (product specifications, application scenarios, procurement volume, etc.).

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