Best Liquid Fertilisers: Fast, Effective Nutrition for Every Plant
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.
For the best outcomes, use CompleteGrow’s premium liquid fertilisers, including the NPK 20-20-20 All Purpose Liquid Fertiliser for general feeding and the NPK 4-18-38 + Calcium & Magnesium for flowering and fruiting. Both are crafted for Australian conditions and suitable for all plant types—from vegetables to ornamentals.