Understanding NPK Fertilizers

NPK fertilizers contain Nitrogen (N), Phosphorus (P), and Potassium (K). The numbers represent the percentage of each nutrient.

Popular Formulas

NPK 15-15-15

Most widely used balanced formula for all crops and soil types.

NPK 16-16-16

Slightly higher analysis, popular in Southeast Asia and Africa.

NPK 20-20-20

High-analysis formula for intensive farming and high-value crops.

Application Rates

200-400 kg/ha for field crops, 300-500 kg/ha for vegetables, split into 2-3 applications.

Siam Fertilizer NPK Range

We manufacture NPK 15-15-15, 16-16-16, and 20-20-20. Custom formulations available. MOQ: 1x20ft container.