Shop All Products: NPK Fertiliser, Liquid Plant Food & CalMag for All Plants – Fast & Free Shipping Australia-Wide
Explore Complete Grow’s full range of high-performance liquid fertilisers, designed for fast absorption and visible results. Whether you’re feeding leafy greens, flowering herbs, citrus trees, or delicate indoor plants, our liquid formulas deliver nutrients right where your plants need them — quickly and efficiently.
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Why choose liquid fertiliser?
Liquid fertilisers are easy to mix, gentle on roots, and ideal for regular feeding. They’re absorbed through both soil and foliage, making them perfect for:
- Potted plants and hanging baskets
- Indoor houseplants and tropicals
- Hydroponic systems and foliar sprays
Quick-boost solutions between slow-release applications
From our best-selling 20-20-20 NPK liquid blend to gentle indoor plant food (16-4-14) and specialised liquid CalMag, our collection covers every stage of growth — from seedling to harvest.
All our fertilisers are Australian-made, formulated with stable nutrients and trace elements for consistent performance, long shelf life, and maximum plant health.
Whether you’re feeding your veggie patch, houseplant collection, or greenhouse crop — Complete Grow’s liquid fertilisers are your go-to for fast, reliable results.
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💚BULK SALE💚 20L All Purpose NPK Liquid Plant Food – Bulk Fertiliser for Home & Commercial Use
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The Best Plant Fertiliser for Every Garden – Liquid, NPK, Indoor & More
Discover the complete range of premium plant fertilisers at Complete Grow – all designed to deliver faster growth, vibrant leaves, stronger roots, and higher yields. Whether you’re growing vegetables, herbs, houseplants, citrus trees or hydroponics, we’ve got you covered with powerful, easy-to-use formulas trusted by Aussie gardeners and growers alike.
From balanced NPK fertilisers like 20-20-20 to targeted solutions like CalMag or high-phosphorus blends, our fertilisers are formulated for fast absorption and long-lasting results. Available in both liquid and powdered forms, these blends deliver essential nutrients right where your plants need them.
What is Fertiliser & Why Do Plants Need It?
Fertilisers are like vitamins for your plants. They provide essential nutrients — mainly Nitrogen (N), Phosphorus (P), and Potassium (K) — that might be missing from your soil or potting mix.
Each nutrient plays a vital role in plant growth:
Nitrogen promotes leafy growth
Phosphorus supports root development and flowering
Potassium boosts plant strength and disease resistance
Without these in the right balance, your plants can struggle to grow, fruit, or flower effectivel
What Makes NPK Fertiliser So Effective?
Most complete plant fertilisers contain three essential macronutrients — Nitrogen (N), Phosphorus (P), and Potassium (K) — known together as NPK. These are the key building blocks your plants rely on to grow and thrive.
Nitrogen boosts leafy green growth
Phosphorus supports root development and flower production
Potassium strengthens the plant and builds disease resistance
The NPK ratio you choose depends on what you’re growing. For general use, a balanced mix like 20‑20‑20 is ideal. For fruiting plants or hydroponics, a higher P and K ratio can be more effective. Each blend delivers a different benefit — helping you tailor your fertilising for better results.
How Often Should You Fertilise?
Most plants thrive when fed regularly during their growing season, typically from spring to early autumn.
Use liquid fertiliser every 1–2 weeks, and powdered blends every 2–3 months. Indoor plants and hydroponics may require more frequent but diluted feeding.
Avoid overfeeding — always follow the label. Plants grow best when nutrients are applied steadily, not all at once. now give me the exact same amount of content but for liquid fertilser shop all page keyword specific for liuquid fertilsers