Shop Liquid Fertiliser for Faster Growth & Healthier Plants
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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- Select options This product has multiple variants. The options may be chosen on the product page
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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
💚BULK SALE💚 20L All Purpose NPK Liquid Plant Food – Bulk Fertiliser for Home & Commercial Use
The Best Liquid Fertiliser for Fast Growth – NPK, Indoor, Citrus, and More
Discover the power of liquid fertiliser with Complete Grow’s premium range — expertly formulated for faster nutrient absorption, healthier roots, and vibrant plant growth. Whether you’re feeding leafy greens, flowering herbs, succulents, or tropical houseplants, our liquid blends are trusted by Aussie growers for their convenience and performance.
Our collection includes balanced NPK liquid fertilisers like 20‑20‑20, targeted CalMag, nitrogen-rich fertilizer options, and formulas made specifically for indoor plants, citrus trees, and hydroponics. Fast-acting and easy to apply, our liquid fertilisers are perfect for routine feeding, foliar spray, and hydro setups.
What is Fertiliser & Why Do Plants Need It?
Liquid fertilisers are plant nutrients dissolved in water — ready to be absorbed instantly by roots and leaves. They work faster than granular fertilisers, making them ideal for indoor plant fertiliser routines, hydroponic nutrients, and fast-growing herbs, flowers, or vegetables.
Liquid formulas are perfect for:
- Indoor plants and hanging baskets
- Hydroponic systems
- Citrus trees and fruiting plants
- Succulents and houseplants
- Foliar spray for quick uptake
Why Liquid NPK Fertiliser Works So Well
Liquid NPK fertilisers combine the three macronutrients every plant needs:
- Nitrogen (N) for lush, green foliage
- Phosphorus (P) for strong roots and flowers
- Potassium (K) for overall health and disease resistance
The NPK 20‑20‑20 blend is perfect for all-purpose feeding, while our high-phosphorus and CalMag liquid fertilisers offer targeted support for fruiting, flowering, and nutrient-deficient plants. Whether you’re managing hydroponic fertilizer cycles or boosting your succulent fertiliser routine, you’ll find the perfect ratio here.
How Often Should You Use Liquid Fertilizer?
For best results, apply liquid fertiliser every 1 to 2 weeks during the growing season (spring to early autumn).
This approach supports consistent growth and reduces the risk of overfeeding — especially important for houseplants, hydroponics, and delicate seedlings.
Follow label directions for dilution rates, especially when using nitrogen fertilizer, calmag, or specialised citrus fertilizer. Overfeeding can harm roots — steady feeding delivers the best results.