MKP Fertiliser for Stronger Roots, Bigger Blooms & Better Fruit
100% water-soluble, so the phosphorus and potassium go to work from the very first watering — not weeks later.
52% Phosphorus34% Potassium100% Water-SolubleHome Gardens to Farms
Mono Potassium Phosphate (MKP) Fertiliser delivers two of the nutrients plants call for most during root development, flowering and fruit set. Because every granule dissolves completely, there’s nothing left behind for your plants to wait on — they can start taking it up from the very first watering. It’s suited to everything from a single pot on the balcony to a full working farm.
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See the Dosage Guide ↓
What Is Mono Potassium Phosphate?
Mono Potassium Phosphate is a crystalline, fully water-soluble fertiliser built around two macronutrients — 52% phosphorus and 34% potassium — plus trace micronutrients that support overall plant health. Because it carries no nitrogen, it’s a precise way to push phosphorus and potassium specifically, right when plants are moving from vegetative growth into flowering and fruiting.
What MKP Does For Your Plants
🌱 Stronger Roots, Faster Establishment
High phosphorus (52%) builds root systems that take up water and nutrients more efficiently, so plants establish and grow faster.
🌸 Bigger Blooms, Better Fruit
34% potassium drives flower formation and improves fruit size and quality — useful for anything you’re growing to flower or fruit.
💧 Nutrients Ready From the First Watering
Fully water-soluble, so there’s no waiting on granules to break down — plants can access nutrients almost immediately.
🛡️ More Resilient Through Heat and Stress
Potassium helps plants regulate water and cope better with drought, heat and general stress — a real advantage through an Australian summer.
How to Use MKP Fertiliser
| Use | Preparation | Application | Frequency |
|---|---|---|---|
| Home gardens & potted plants | Dissolve 5 grams in 1 litre of water | Apply directly to the soil | Every 2 weeks |
| Vegetable gardens & flower beds | Dissolve 50 grams in 5 litres of water | Apply evenly using a watering can or sprayer | Every 2–3 weeks |
| Farms & orchards — foliar spray | Dissolve 500 grams in 100 litres of water | Spray directly on leaves for rapid absorption | — |
| Farms & orchards — soil application | Apply 5 kg per hectare | Spread evenly across the field | — |
↔ Scroll to see the full table on smaller screens
🧮 Not sure about your exact plant or setup?
Our free Smart Fertigation Planner works out the exact MKP dose for your specific plant, soil type and growing conditions in seconds — no guesswork, no over- or under-feeding.
Why MKP Works Well in Australian Conditions
MKP performs across a wide range of Australian climates, including conditions that trip up other fertilisers — alkaline soils and saline environments among them. The balanced 52% phosphorus and 34% potassium formulation gives consistent results across vegetables, fruiting plants and flowering ornamentals alike.
✓ Alkaline-soil tolerant✓ Saline-tolerant✓ Nitrogen-free precision feed
Frequently Asked Questions
How do I know if my plants need MKP fertiliser?
Can MKP fertiliser be mixed with other fertilisers?
How often should I apply MKP fertiliser?
What size is available?
Do you ship Australia-wide?
Buy Mono Potassium Phosphate (MKP) Fertiliser
Give your plants a concentrated, fast-dissolving boost of phosphorus and potassium — right when they need it most for roots, flowers and fruit.
🚚 Ships across Australia 🔒 Secure checkout 🌱 For home gardens & commercial growers
Hi, how I can order larger sizes of MKP? Thanks!
Hi, thanks for your message. Please email info@greenpick.au for the quote and more details.