Mono Potassium Phosphate MKP 0-52-34 – Water Soluble Fertiliser

Mono Potassium Phosphate (MKP) 0-52-34: Water-Soluble Phosphorus & Potassium Fertiliser

Mono Potassium Phosphate (MKP) is a high-purity, fully water-soluble fertiliser that supplies concentrated phosphorus and potassium with no nitrogen. With an analysis of 0-52-34, it delivers 52% phosphate (P₂O₅) and 34% potash (K₂O), making it one of the most concentrated straight PK fertilisers available. It's a go-to product for fertigation, foliar feeding and hydroponics across vegetables, fruit, flowers and ornamentals.

The nitrogen-free formula is what makes MKP so useful. Phosphorus and potassium are in high demand at specific stages, root establishment early on, then flowering, fruit set and ripening, and MKP delivers both without adding nitrogen that would push unwanted leafy growth at exactly the wrong time. Potassium also improves fruit quality, sugar content and colour, while phosphorus supports energy transfer, root development and flower initiation.

It's also easy on plants. MKP is chloride-free and sodium-free, dissolves completely into a clear solution without clogging drippers or nozzles, and has one of the lowest salt indexes of any soluble fertiliser, so there's little risk of burn even in foliar sprays or on sensitive crops.

How to Use

MKP dissolves readily in water, and solubility improves in warmer water. General guide rates:

• Fertigation: around 1 to 2 kg per 1,000 litres of water, applied at key growth stages (root establishment, pre-bloom, fruit set)

• Foliar spray: a 0.5 to 1% solution (around 5 to 10 g per litre), sprayed in the cooler parts of the day to avoid leaf stress

• Hydroponics: include in the nutrient solution according to crop and growth stage

Always match the rate to your crop, system and stage, and follow any product or agronomic guidance. As with any foliar feed, test on a small area first before treating a whole crop.

Key Features & Benefits

• Concentrated 0-52-34 analysis: 52% phosphate and 34% potash

• Nitrogen-free, so phosphorus and potassium can be applied without pushing leaf growth

• 100% water-soluble, forming a clear solution with no clogging

• Chloride-free and sodium-free, safe for sensitive and chloride-shy crops

• Low salt index for good foliar tolerance and low burn risk

• Supports root establishment, flowering, fruit set and fruit quality

• Suitable for fertigation, foliar spraying and hydroponics

• Available in 2kg, 4kg and 25kg

Frequently Asked Questions

What is the analysis of Mono Potassium Phosphate 0-52-34?
It supplies 0% nitrogen, 52% phosphate (P₂O₅) and 34% potash (K₂O). It's a nitrogen-free, fully water-soluble phosphorus and potassium fertiliser.

What is MKP fertiliser used for?
It's used to supply phosphorus and potassium at high-demand stages, root establishment, flowering, fruit set and ripening, without adding nitrogen. It's popular in fertigation, foliar feeding and hydroponics for vegetables, fruit and flowering crops.

How do I mix and apply MKP?
For fertigation, use around 1 to 2 kg per 1,000 litres of water. For foliar spraying, use a 0.5 to 1% solution (about 5 to 10 g per litre) applied in the cooler part of the day. In hydroponics, add it to the nutrient solution per your crop's needs. Warmer water helps it dissolve faster.

Why use a nitrogen-free fertiliser?
At flowering and fruiting, extra nitrogen can push leafy growth at the expense of flowers and fruit. A nitrogen-free PK source like MKP lets you feed phosphorus and potassium precisely at those stages, and manage nitrogen separately.

Is MKP safe for foliar spraying?
Yes. Its low salt index and chloride-free formula make it one of the more foliar-tolerant fertilisers, but it's still wise to use the correct concentration and test a small area first, especially in hot weather.

Can I use MKP in hydroponics?
Yes. It's fully soluble and forms a clean, clear solution, which makes it well suited to hydroponic and precision fertigation systems.

What sizes does it come in?
It's available in 2kg, 4kg and 25kg, with the 25kg suited to commercial growers and larger operations.