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Hydroponic Nutrients Fertilizer – Two-Part Formula (A & B)
$31.50 – $275.00
Professional-grade liquid fertiliser now bottled for home growers.
✅ Suitable for indoor, outdoor & hydroponic systems
✅ High-grade minerals for fast absorption & strong growth
✅ Includes Potassium Nitrate, Calcium Nitrate, Magnesium & trace elements
✅ Two-part system (Part A & B) for complete plant nutrition
✅ NPK 25-6-40
Australian Owned & Manufactured
Free Shipping
Boost Plant Growth
CompleteGrow A & B Nutrient Solution – Commercial Strength, Home-Gardener Ready
Developed by hydroponic farmers with over 20 years of experience, this premium two-part liquid fertiliser delivers professional-grade nutrition—now made simple for everyday growers.
Suitable for hydroponic systems, indoor plants, outdoor gardens, vegetables, fruit trees, and more. Formulated with high-purity minerals for rapid absorption and visible growth results.
What Makes This Fertiliser Special?
- Trusted by commercial growers for consistent performance
- Contains all essential macro and micronutrients plants need
- 100% water-soluble for clean, efficient hydroponic feeding
How to Use
Always dilute Part A and Part B separately in water (never mix concentrates together).
- Hydroponics & Seedlings: 3ml Part A + 3ml Part B per 1L water
- Potted Plants & Gardens: 4ml Part A + 4ml Part B per 1L water
Typical Nutrient Analysis (% W/V):
| Nutrient | Percentage (% W/V) |
|---|---|
| Nitrogen (N) | 25.6% |
| Phosphate (P) | 5.7% |
| Potassium (K) | 41.5% |
| Calcium (Ca) | 3% |
| Magnesium (Mg) | 1% |
| Sulphur (S) | 1.8% |
Trace Elements
| Element | Percentage (%) |
|---|---|
| Iron (EDTA) | 0.030% |
| Manganese (EDTA) | 0.012% |
| Zinc (EDTA) | 0.020% |
| Boron | 0.015% |
| Copper Sulphate | 0.004% |
| Sodium Molybdate | 0.002% |
Safety Directions
⚠️ Not to be taken. Keep out of reach of children. May irritate skin or eyes. Wash hands after use and rinse all edible plants before consuming. Made in Australia • Used by Professionals • Bottled for Home GardenersCommercial Hydroponic Nutrients – Hydroponic Plant Grow Part A & B
✅ Suitable for indoor, outdoor & hydroponic setups
✅ High-grade minerals for fast absorption & visible results
✅ Includes Calcium Nitrate, Potassium Nitrate, Magnesium & more
✅ Approximate NPK Ratio: 25 – 6 – 40
✅ Used by commercial growers, now bottled for home use
✅ Australian made with free shipping
NPK Ratio
-
N
25
-
P
6
-
K
40
What NPK 25-6-40 Means (Hydroponic Nutrients)
NPK 25-6-40 is a hydroponic nutrient profile with higher N and K for fast vegetative growth, leaf colour, turgor and yield quality—plus sufficient P to build roots and structure. Ideal for leafy greens, herbs, fruiting crops and general “grow” phases in DWC, NFT, flood & drain, coco and soil.
- Hydroponic nutrients: Fully water-soluble minerals for clean reservoirs and rapid uptake.
- Performance ratio: 25% nitrogen (growth/green), ~6% phosphate (roots/structure), ~40% potash (vigor, flavour, resilience).
- Two-part friendly: Commonly supplied as Part A & Part B to prevent precipitation and nutrient lockout.
Read More
In hydroponics, plants receive nutrition directly from the solution, so the NPK balance matters. With 25-6-40, nitrogen (N) supports chlorophyll production and leafy biomass; phosphorus (P) underpins root growth, energy transfer and early flowering signals; potassium (K) regulates water movement, enzyme activity and fruit quality. The elevated K in this profile helps strengthen stems, enhance colour and flavour and improve overall stress tolerance.
Our professional blends use high-purity salts such as Calcium Nitrate, Potassium Nitrate, Magnesium sources and chelated trace elements (Fe, Mn, Zn, Cu, B, Mo) for stability and availability. A two-part (A & B) format keeps calcium separate from phosphates/sulphates until diluted, preventing cloudy precipitates and keeping EC/ppm predictable.
- Use: Suitable for hydroponic systems (DWC, NFT, ebb/flow), coco coir and soil. Great for greens, herbs, tomatoes, peppers, berries and ornamentals.
- Mixing tip: Always add Part A to water and stir until dissolved, then add Part B. Never mix concentrates together.
- Pairs well with: Cal-Mag in very soft water, and a bloom booster later if you want extra flower density.
- Application: Follow label rates; apply to moist media. Monitor EC/ppm and pH for consistent results.
- Safety: Not to be taken. Keep out of reach of children. Avoid eye/skin contact and rinse edible plants before consumption.
Best For These Plants
Made for Hydroponic Systems & Grow Tents
Powerful Results in Pots & Garden Beds Too
How it Works
Hydro: 3ml A + 3ml B per 1L
Soil: 4ml A + 4ml B per 1L
Feed Your Plants
Watch Them Thrive
Reviews From Our Gardener's
Wow, noticeably better growth and excellent value
(read about my comparison)
I’ve been growing a range of plants in my hydroponic setup, mostly lettuce, kale, and spinach, and after switching to these nutrients, I’ve seen a huge improvement in growth and overall plant health. Everything in my setup stayed the same: lights, trays, timer, etc, so this was a fair comparison, and the difference was clear. My plants are growing faster, look more vibrant, and seem much healthier than when I was using the smaller bottle of nutrients that came with my kit. The cos lettuce (same seeds) also ‘stronger’ if thats possible!
These bottles are also great value for the volume you get. It’s easy to see why they come up as an Amazon recommendation. I didn’t realise how much of a difference nutrient quality could make until now.
I’ve attached a photo of my current setup (at about 4 weeks) so you can see the results for yourself. This is only half grown, I have run out of room. I think they are growing about 30% faster. Highly recommend this if you’re serious about getting better growth from your hydro system.
Holden_
Verified Buyer
Sydney Farmer
Verified Buyer
FAQ
The Grow Blog: News, Tips, & Stories
What is NPK 20-20-20 Fertiliser?
