#liquidfertiliser

Complete Grow Advanced Formula – NPK 4‑18‑38 + CaMg

Meet your plant’s new favourite feed.

This high-performance powdered fertiliser is formulated with a strong NPK ratio (4-18-38) + added Calcium Nitrate and Magnesium Sulphate — perfect for fruiting crops, leafy greens, and hydroponic systems.

✅ High potassium for flowering & fruiting ✅ Supports strong roots & disease resistance ✅ Ideal for tomatoes, capsicums, leafy greens & herbs ✅ 100% water-soluble – great for fertigation or foliar spray ✅ Compatible with coco, soil, and hydroponic setups

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Liquid fertilisers are one of the most efficient ways to keep your plants healthy, green, and productive. Unlike slow-release or granular options, a liquid fertiliser delivers nutrients instantly, allowing roots and leaves to absorb essential minerals right away. Whether you’re caring for vegetables, ornamentals, or indoor greenery, liquid plant food offers the perfect balance of convenience and performance.

You can explore CompleteGrow’s full range of liquid fertilisers here: https://completegrow.com.au/fertiliser/liquid-fertilizer/.

Why Liquid Fertiliser Works So Well

A liquid plant fertiliser is pre-dissolved in water, meaning the nutrients are available immediately for plant uptake. This allows for precise feeding and faster visible results. It’s especially beneficial in Australia’s changing climate, where soil nutrients can deplete quickly.

The best liquid fertilisers provide a complete blend of the three major macronutrients—nitrogen (N), phosphorus (P), and potassium (K)—along with essential trace elements like calcium, magnesium, and iron.

CompleteGrow’s NPK 20-20-20 All Purpose Liquid Fertiliser is an excellent all-rounder. It promotes strong leaf and stem growth, robust root systems, and healthy flowering across all plant types.

For plants that require more flowering or fruiting power, the NPK 4-18-38 + Calcium & Magnesium provides the high-phosphorus boost needed for vibrant blooms and rich yields.

How to Use Liquid Fertiliser Effectively

Using a liquid plant food is simple: just dilute it with water and apply it evenly across the soil or as a foliar spray.

For general garden use:

Mix 4–6mL per 1L of water for soil application.

Water at the base of plants every 7–10 days during active growth.

For indoor or potted plants:

Use a half-strength mix (around 2–3mL per 1L) to prevent overfeeding.

Apply fortnightly to maintain rich colour and steady growth.

For vegetables:

Feed with a balanced formula such as CompleteGrow NPK 20-20-20 during early growth.

Once flowering begins, alternate with CompleteGrow NPK 4-18-38 + Calcium & Magnesium for better fruit set and flavour.

Liquid feeding ensures the nutrients reach the plant immediately, preventing deficiencies and improving soil biology over time.

Benefits of Using Liquid Fertilisers

Fast results: Nutrients are immediately available to the roots and leaves.

Flexible use: Perfect for both soil and hydroponic systems.

Precise control: Easier to measure and apply without overfeeding.

Even coverage: Spreads uniformly when watered or sprayed.

Compatible with any plant type: From vegetables to flowering ornamentals.

All CompleteGrow liquid fertilisers are Australian-made, professional-grade, and fully water-soluble—trusted by home gardeners and commercial growers alike.

FAQs About Liquid Plant Food

What is liquid plant food? It’s a water-based fertiliser that provides nutrients directly to plants through soil or leaves for faster absorption.

Is liquid fertiliser better than granular? Yes—liquids act faster and allow for easier dosage control, especially for container or hydroponic systems.

Can I use liquid fertiliser for vegetables? Absolutely. Use CompleteGrow NPK 20-20-20 during early stages and 4-18-38 + CaMg once plants begin fruiting.

How often should I apply liquid fertiliser? Every 1–2 weeks during active growth periods, or monthly for maintenance feeding.

Will liquid fertiliser harm my plants? No, not if diluted correctly. Always follow label directions and water in well after application.

Final Thoughts

Liquid fertilisers are a must-have for anyone who wants healthy, fast-growing, and productive plants. They’re quick to apply, easy to adjust, and give visible results within days.

Fruit trees need more than sunshine to thrive—they rely on balanced nutrition throughout the growing season. The right fertilizer for fruit trees promotes strong roots, healthy leaves, and abundant, flavourful fruit. Whether you’re tending to citrus, apples, or passionfruit, feeding correctly can make the difference between an average harvest and an exceptional one.

Understanding What Fruit Trees Need

Every fruit tree’s performance depends on three core nutrients:

Nitrogen (N) – for lush green leaves and strong growth.

Phosphorus (P) – for root and flower development.

Potassium (K) – for fruit size, colour, and sweetness.

A balanced formula such as CompleteGrow NPK 20-20-20 All Purpose Liquid Fertiliser is ideal for maintaining steady growth in most fruit species. During flowering and fruiting, switch to a high-phosphorus and potassium blend like CompleteGrow NPK 4-18-38 + Calcium & Magnesium to improve fruit set, flavour, and resilience.

These formulas are fully water-soluble, ensuring fast uptake and precise feeding through soil drench or fertigation systems.

When and How to Fertilize Fruit Trees

Timing and consistency are key:

Spring: Feed with NPK 20-20-20 to drive new leaves and root growth.

Pre-Flowering (late spring): Apply 4-18-38 + CaMg to support strong buds and early fruit formation.

Summer: Continue fortnightly feeding to maintain energy for fruit swelling.

Autumn: Reduce nitrogen and give a final light feed of 4-18-38 + CaMg before dormancy.

Always apply diluted fertilizer evenly around the drip line of the tree (where the feeder roots are most active), then water deeply. Avoid heavy feeding during winter when the tree’s nutrient demand slows.

For passionfruit and citrus trees, regular light applications produce the best flavour and prevent deficiencies. Citrus in particular benefit from steady potassium and magnesium for juicier, sweeter fruit.

Choosing a Good Fertilizer for Fruit Trees

A good fertilizer for fruit trees should:

Contain a balanced NPK ratio or a targeted bloom-boosting formula.

Include trace elements such as calcium, magnesium, and iron.

Be 100 % water-soluble for efficient absorption.

Work in both soil and hydroponic systems.

CompleteGrow’s fertilizer range meets all these needs, offering professional-grade quality for home growers. The 20-20-20 All Purpose Liquid Fertiliser supports vegetative growth, while 4-18-38 + CaMg maximises fruiting potential. Both are Australian-made and formulated for local soils and climates.

FAQs About Fertilizing Fruit Trees

What is the best fertilizer for fruit trees? Use a balanced fertilizer like CompleteGrow NPK 20-20-20 for general feeding and NPK 4-18-38 + CaMg during flowering and fruiting.

How often should I fertilize fruit trees? Every 3–4 weeks in spring and summer; less frequently in cooler months.

Can I use the same fertilizer for citrus and passionfruit? Yes, both respond well to the same nutrient balance—particularly those high in potassium and magnesium.

How soon will I see results? Within 2–3 weeks of regular feeding, you’ll notice greener foliage and stronger new growth.

Final Thoughts

Feeding your trees with a complete, balanced fertilizer keeps them productive for years. Consistent nutrition ensures vigorous growth, disease resistance, and superior fruit quality.

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