K+S·Macronutrients
NPK 4-15-21 (chlorine-free)
NPK 4-15-21 (chlorine-free) — a mineral complex fertilizer without chlorine for chlorine-sensitive crops: potato, tomatoes, cucumbers, pepper, strawberry, raspberry, currant, beans, pea, other vegetable and fruit crops.
Main advantages
- No chlorine — for chlorine-sensitive crops
- Water-soluble phosphorus — root system, per the maker
- Kieserite (MgSO4·H2O) — basis of effect per the maker
- Potassium with a low salt index — per the maker
Overview
About this product
NPK 4-15-21 (chlorine-free) — a mineral complex fertilizer for chlorine-sensitive crops: potato, tomatoes, cucumbers, pepper, strawberry, raspberry, currant, beans, pea, other vegetable and fruit crops. The nutrients are fast-dissolving; the high water-soluble phosphorus content, per the maker, ensures development of a strong root system at the early stages.
The maker names the natural magnesium sulphate kieserite (MgSO4·H2O) as the basis of effectiveness, and the potassium has a low salt index. Garden crops: 100–300 kg/ha at a single application; vegetable crops: 100–300 kg/ha under irrigation and 300–800 kg/ha without irrigation; lawn grasses: 2–4 kg per 100 m².
Application
Rate, timing and crops
Rate
Garden crops
- Application rates
- 100–300 kg/ha at a single application
Vegetable crops
- Application rates
- 100–300 kg/ha under irrigation and 300–800 kg/ha without irrigation
Lawn grasses
- Application rates
- 200–400 kg/ha (2–4 kg/100 m²)
- Conditions
The maker recommends it for all soil types regardless of pH
Store in a dry place under a plastic tarpaulin away from moisture; in bulk storage protect steel beams and supports from corrosion, and the floor and walls with a protective coating
- Crops
- PotatoTomatoesCucumbersPepperStrawberryRaspberryCurrantBeansPeaVegetable cropsFruit cropsGarden cropsLawn grasses
Figures from the manufacturer, K+S. Source page
Specifications
Nutrient composition
| Type | NPK Complex |
|---|---|
| Nitrogen (N) | 4% |
| Phosphorus (P₂O₅) | 15% |
| Potassium (K₂O) | 21% |
Composition
| |
| Target Crops | Potato, Tomato, Cucumber, Pepper, Strawberry, Raspberry, Currant, Bean, Peas, Vegetables, Fruit crops, Horticultural crops, Turf |
| Manufacturer | K+S |
| Chloride-free | Yes |
Vendor offers
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Questions & answers
What farmers ask most
- Rates depend on crop, prior history, soil-analysis results, and current soil nutrient status. A typical NPK complex on cereals is 150–300 kg/ha. Use the NPK calculator on adam.ua or consult an agronomist for an exact dose.
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Product specifications are compiled from publicly available manufacturer sources and are provided for guidance only — confirm all details with the vendor before purchase. Brand names, logos and trademarks are the property of their respective owners; a listing on ADAM does not imply affiliation, sponsorship or endorsement.