Shop Specialty Fertiliser: Targeted Plant Nutrition for Unique Needs – Trusted by Aussie Growers
Explore Complete Grow’s range of high-performance specialty fertilisers, crafted for specific plant needs like citrus trees, succulents, hydroponics, flowering boosters, and more. Perfect for advanced gardeners and commercial growers seeking precision results.
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Not every plant thrives on general-purpose blends — that’s where our specialty fertilisers come in. These advanced formulas are made to meet the demands of unique growing situations, from fruit-heavy citrus trees to flowering ornamentals, succulents, and hydroponic systems. Choose from:- Citrus Fertiliser – High potassium for juicy, heavy fruit
- Phosphorus-Rich Blends – For flowering, root development, and fruiting
- Succulent & Cactus Fertiliser – Supports compact, clean growth with low-stretch formulation
- Hydroponic & A+B Nutrients – Clean, water-soluble formulas for soilless systems
- Micronutrient & CalMag Additives – Balance deficiencies & boost performance
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- Select options This product has multiple variants. The options may be chosen on the product page
- Quick View
- Select options This product has multiple variants. The options may be chosen on the product page
- Quick View
- Select options This product has multiple variants. The options may be chosen on the product page
Targeted Plant Nutrition Starts Here – Specialised Fertilisers for Specific Needs
Complete Grow’s specialty fertilisers are built for plants that demand more — whether it’s flowering citrus trees, magnesium-hungry tomatoes, or hydroponic setups requiring perfectly balanced A&B solutions. These aren’t your everyday blends. They’re engineered for results.
From high-phosphorus formulas that drive flowering and fruiting, to CalMag support for calcium- and magnesium-deficient soils, each solution is developed to meet the needs of advanced growers and passionate plant lovers who want to take their garden further.
Our lineup includes:
- Citrus Fertiliser for heavy, flavour-rich fruiting
- Phosphorus & Potassium Blends for blooms and root health
- Hydroponic Nutrients (A & B) for clean, consistent delivery
- CalMag Supplements to correct common deficiencies
- Trace Micronutrient Mixes for optimal metabolic support
Why Choose Specialty Fertilisers?
Some plants simply outgrow basic plant food. That’s when you reach for a specialty fertiliser — a formula designed for precision, tailored nutrients, and performance in challenging conditions.
Key benefits of specialty fertilisers:
- Solve common plant issues like blossom-end rot, yellowing leaves, or stunted growth
- Support heavy feeders like citrus, tomatoes, and hydro crops
- Balance NPK with secondary nutrients like Calcium, Magnesium, Sulfur, Iron, Zinc
- Deliver results even in poor soil, coco coir, or soilless environments
These fertilisers are ideal for greenhouse setups, advanced hobbyists, and high-performance home gardens.
How Often Should You Use Specialty Fertilisers?
Application depends on the blend.
- Liquid CalMag or micronutrient support is typically applied weekly, diluted in water.
- High-P blends may be used every 2–3 weeks during bloom or fruiting periods.
- Hydroponic nutrients should be used as part of a regular feeding cycle, with EC and pH monitored closely.
Always follow the label and avoid stacking nutrients unless advised. Specialty fertilisers are powerful — a little goes a long way. Used correctly, they unlock full genetic potential and eliminate deficiencies fast.
What does CalMag do for plants, and when should I use it?
CalMag is a liquid supplement that provides two essential secondary nutrients — calcium and magnesium — which support strong cell walls, healthy leaf development, and nutrient uptake. It’s especially useful in preventing issues like blossom-end rot, leaf curling, and yellowing between veins (interveinal chlorosis).
Use CalMag during active growth stages, particularly in fast-growing or fruiting plants like tomatoes, peppers, citrus, and hydroponic crops. It’s best applied weekly as a foliar spray or mixed into your watering routine. It’s also great for correcting nutrient lockout caused by soft water, coco coir, or heavy feeding.