PK is a nitrogen free crystalline product, as well as sodium and chlorine free. It is   an acidic PK fertilizer for fertigation with formula 0-60-20 (60% P2O5 and 20% K2O). This product is intended for soil-less, as well as open-field horticulture fertigation applications. It is also well-suited for use in blends of fully-soluble fertilizers as a tool for incorporating calcium, magnesium and micronutrients into the mixed fertilizers.

PK has an anticlogging action and enhances nutrients’ uptake, due to its acidic nature.