Monopotassium phosphate (MKP, KH₂PO₄) is a fully water-soluble, chloride-free fertilizer, typically supplied as 0-52-34: 52% phosphorus pentoxide (P₂O₅) and 34% potassium oxide (K₂O). It provides phosphorus and potassium without adding nitrogen, making it useful when these nutrients are needed while nitrogen inputs must be controlled. MKP is widely used in fertigation and foliar feeding. Appropriate applications can support root establishment and fruit quality, while foliar f