High-strength 20-20-20 liquid fertiliser with essential trace elements. One feed for roots, foliage and steady growth.
“I used it on my clivia which are in large pots.I have been growing these plants for more than 12 years and the results I have had since using the complete grow 20:20:20 are amazing.The plants present as if they are...”
Australian owned
& manufactured
A balanced NPK fertiliser formulated from NPK 20-20-20 with essential trace elements. Made from high-quality natural raw materials to give your whole garden stronger roots, healthier foliage and sustained growth.
Great for
Why growers choose it
Powerful concentrate: high-strength liquid formula for effective feeding in every application.
Enriched with trace elements: iron, zinc, manganese and boron for stronger plant performance.
Fast-absorbing & easy to use: water it in or spray the leaves for consistent, visible results.
One feed, many plants: a versatile formula that replaces a shelf of different fertilisers.
A little goes a long way: just a small amount mixed with water makes litres of ready-to-use feed, so one bottle lasts for many feeds.
Formulated from premium NPK 20-20-20 made from natural minerals, for a balanced 1:1:1 feed.
NPK analysis
Trace elements
Shake well, measure, then always dilute in water before applying.
Faster for big gardens
Using the hose-end sprayer
Fill the bottle to 1 litre, attach to your hose and spray evenly around the root zone. Set the dial to A.
Pick a strength for the bottle:
These bottle mixes are only for the CompleteGrow hose-end sprayer, which dilutes as you water.
Mix 4 mL per litre of water. At that rate 1L makes 250L of ready-to-use feed, 4L makes 1,000L and 20L makes 5,000L.
Once a week during the growing season, and less often through the cooler months when growth slows.
Yes. It works as both a soil feed and a foliar feed. Spray leaves in the early morning or late afternoon, not in full sun.
Yes. Use it at half strength for indoor plants, seedlings and other sensitive plants.
Yes. It works with the CompleteGrow 1L Hose-End Fertiliser Sprayer for faster, even coverage across larger gardens.
Essential trace elements including iron, zinc, manganese and boron, for stronger overall plant performance.
Use All Purpose while plants are growing leaves and stems. Switch to Advanced Formula 4-18-38 once plants start budding, flowering or fruiting.
It isn't classified as hazardous and carries no poisons schedule, but store the concentrate where children and pets can't reach it. If swallowed, rinse the mouth, drink a glass of water and call the Poisons Information Centre on 13 11 26.
No. For cacti and succulents, use CompleteGrow Cactus & Succulent Plant Food (NPK 2-7-7), which is made for them.
It stays stable under normal storage. Keep the cap closed and store it somewhere cool, dry and well ventilated, out of direct sunlight and away from bleach and other strong chemicals.
Growing something great?
Share a quick review and a photo of your garden — it really helps other gardeners.
I used it on my clivia which are in large pots.I have been growing these plants for more than 12 years and the results I have had since using the complete grow 20:20:20 are amazing.The plants present as if they are happy.I have also used this product throughout my garden and the results in a short time are very pleasing.
Thank you Daniel and team.
Dennis From Dromana ,Victoria.
Applying it was very easy, decanted some from large container into a smaller one. I used it on my seedlings and other annual flowering plants, peonies and roses. Results I noticed: n has not been long enough to tell.
Improved thickness and growth of lawn.
All Purpose Formula
No-smell formula for easy indoor feeding.
Great for foliage plants that need balanced weekly feeding without the routine feeling messy or complicated indoors.
Higher yields and faster growth for edible gardens.
A strong all-round choice for edible gardens, raised beds and herb pots that need dependable routine feeding.
Steady support for healthy colour and growth.
Ideal for ornamentals and flowering plants that benefit from a reliable all-round feeding routine.
One versatile feed for everyday garden plants.
Suitable for hedges, shrubs, screening plants and mixed borders that need dense, even growth through the season.
General support during active fruiting growth.
Useful when fruit trees need balanced feeding support for foliage, flowering and seasonal development.
Fast-mixing nutrition for soilless systems.
Dissolves cleanly for water-based and soilless growing when used at the correct rate for your system.
Measure, mix with water and feed your plants.
Water in or use our sprayer.
Attach to your hose for fast, even feeding—no measuring cups.
Complete nutrition.
Visible results within 7 days.
Enter how much water you are using.
Standard 4 mL/L · Half strength 2 mL/L
Your mixing amount will appear here.
Growing something great?
Share a quick review and a photo of your garden — it really helps other gardeners.
I used it on my clivia which are in large pots.I have been growing these plants for more than 12 years and the results I have had since using the complete grow 20:20:20 are amazing.The plants present as if they are happy.I have also used this product throughout my garden and the results in a short time are very pleasing.
Thank you Daniel and team.
Dennis From Dromana ,Victoria.
Applying it was very easy, decanted some from large container into a smaller one. I used it on my seedlings and other annual flowering plants, peonies and roses. Results I noticed: n has not been long enough to tell.
Improved thickness and growth of lawn.
Verified Buyer
One litre makes up to 250 litres of plant feed at standard strength, or up to 500 litres when mixed at half strength for sensitive plants and light feeders.
4 mL per litre
Add 4 mL concentrate per 1 L of water
2 mL per litre
Add 2 mL concentrate per 1 L of water
Makes up to 500 litres of feeding
Limited growth support
Weak NPK blends
Doesn't work for all plants
Slow-release nutrients
Inconsistent nutrient NPK levels
Unpleasant Smell
CompleteGrow All Purpose Liquid Fertiliser is an Australian-made, concentrated plant food formulated from balanced NPK 20-20-20 source nutrients and essential trace elements. One easy formula feeds vegetables, herbs, flowers, orchids, indoor plants and outdoor gardens.
Made in Australia with high-grade materials
A balanced, all-purpose fertilizer—also called 20-20-20 fertilizer or 20 20 20 fertilizer—supplying equal parts nitrogen (N), phosphorus (P) and potassium (K) for even vegetative growth, strong roots and steady flowering across vegetables, houseplants, ornamentals and lawns.
What does NPK 20-20-20 mean? NPK refers to the three primary plant nutrients: nitrogen (N), phosphorus (P) and potassium (K). The matching 20-20-20 numbers describe a balanced source ratio, meaning none of the three primary nutrients is intentionally favoured over the others. Refer to the product label for the finished liquid’s guaranteed analysis.
A balanced NPK fertiliser is useful when plants need broad, routine nutrition rather than a formula designed to strongly favour leafy growth, rooting or flowering. It is a practical all-purpose plant food for maintaining steady growth across different stages of plant development.
CompleteGrow also contains six essential micronutrients: iron, manganese, boron, copper, zinc and molybdenum. Plants require these elements in much smaller quantities, but they still contribute to chlorophyll formation, enzyme activity and other processes required for healthy growth.
Plant requirements change with species, growth stage, water quality and growing conditions. A crop with a specific deficiency or specialised flowering requirement may need a different feeding program. Avoid adding calcium, magnesium or other supplements automatically—use them only when your water, growing system or plants indicate they are required.
Always follow the CompleteGrow product label and begin at half strength when feeding seedlings, sensitive plants or an unfamiliar variety.
A balanced, all-purpose liquid fertiliser that makes routine plant feeding simple. Each application supplies equal N-P-K source nutrition plus six essential micronutrients for gardens, pots, coco and hydroponic growing.
Nitrogen supports green growth, phosphorus supports roots and energy transfer, and potassium supports plant vigour, water regulation and resilience.
The balanced 20-20-20 source ratio provides even nutrition through vegetative growth, flowering and fruit development without heavily favouring one growth stage.
Iron, manganese, boron, copper, zinc and molybdenum support chlorophyll formation, enzyme activity and the plant processes behind healthy growth.
The liquid concentrate disperses quickly in water, helping you prepare an evenly diluted feed without waiting for granules or powder to dissolve.
Use as directed in soil, pots, coco and hydroponics, or at half strength as a foliar feed for suitable plants.
One litre makes up to 250 litres at 4 mL/L, or up to 500 litres at the 2 mL/L half-strength rate.
Choose the rate for your plants, measure the concentrate and dilute it thoroughly with water. Use 4 mL/L for routine root-zone feeding or 2 mL/L for sensitive plants and foliar application.
Use for established plants during active growth. Apply the diluted fertiliser around the root zone according to the product label.
Use for foliar feeding, seedlings and sensitive plants.
Measure 4 mL per litre of final solution, or 2 mL per litre when using half strength.
Add the concentrate to water and mix thoroughly so the fertiliser is evenly dispersed.
Apply around the root zone, or mist foliage at half strength during the cooler part of the day.
CompleteGrow NPK 20-20-20 liquid fertiliser can be used, as directed, for vegetables, herbs, flowers, orchids, indoor plants, lawns and container gardens. Begin with the half-strength rate for seedlings, sensitive plants or unfamiliar varieties, and always follow the product label.
Yes. It is suitable for hydroponics and coco. Crop requirements, water quality, pH and electrical conductivity (EC) vary between systems, so monitor your nutrient solution and adjust the feeding program to suit the crop.
Yes. Use the half-strength rate of 2 mL per litre, test a small area first, and apply during the cooler part of the day. Avoid spraying in strong sunlight, extreme heat or when plants are stressed.
One litre of concentrate makes up to 250 litres at the standard 4 mL/L rate, or up to 500 litres at the half-strength 2 mL/L rate. Measure against the final volume of diluted solution.
For established plants, apply weekly during active growth and reduce to every two weeks during slower winter growth. Plant needs vary, so watch how your plants respond and follow the product label.
Apply liquid fertiliser to moist growing media rather than very dry roots. This helps the diluted solution spread more evenly through the root zone. Avoid applying to waterlogged media.
Download the current CompleteGrow All Purpose Liquid Fertiliser Safety Data Sheet.
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