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Complete 3-part nutrient system for flowering and fruiting plants
✅ High-phosphorus NPK 4-18-38 for stronger blooms and heavier fruit set
✅ With calcium and magnesium for firmer, tastier, more colourful fruit
✅ Balanced for hydroponics and soil with steady feeding through every stage
✅ Boosts yield, flavour and bloom density across fruiting plants
A complete, high-performance nutrient system for vegetables, herbs, and leafy greens. This three-part formula provides all essential macro and micronutrients required throughout every stage of plant growth — from seedling to harvest.
Suitable for both hydroponic and soil-based growing.
| Nutrient | Percentage (%) |
|---|---|
| Total Nitrogen (N) | 4% |
| Phosphate (P₂O₅) | 18% |
| Potash (K₂O) | 38% |
Each component is designed to work together for healthy, productive plants.
Feeding instructions and mixing ratios are clearly listed on the package.
I have switch from the seasol fertiliser i was using, to this advanced fruiting fertiliser and the results have been great my tomato produced alot more fruit this year with healither growth. Has been very good will continue to use
my third time buying this product so obviously I love it, my hydroponic tomatoes are thriving on this nutrient, I can't recommend it highly enough, fast delivery too
Higher P and K to drive budding, flowering and fruit quality while keeping foliage compact.
The 4-18-38 profile prioritises phosphorus and potassium. Phosphorus supports stronger roots and abundant flower initiation, while potassium drives colour, flavour and overall resilience. The modest nitrogen helps prevent stretch, directing energy into blossoms and fruit load. With added Calcium Nitrate and Magnesium Sulphate, plants also receive structural strength, resistance to tip burn, and improved chlorophyll activity.
Flowering & Fruiting Performance
CompleteGrow 4-18-38 is built for stronger flowering, improved fruit set and more productive crops, especially tomatoes and other heavy-feeding fruiting plants.
Excellent for flowering, fruit set and heavier tomato feeding programs.
A strong choice for tomato growers once plants move beyond early leafy growth and begin pushing flowers, trusses and fruit. The high potassium flowering ratio makes it especially useful for productive tomato crops and commercial-style growing routines.
Supports fruit fill, crop load and productive flowering stages.
Ideal for crops that need more than just leafy growth support. This formula is designed for plants putting energy into flowers, fruit formation and overall yield performance.
Built for plants that need help pushing stronger blooms.
Useful for flowering plants where bloom development matters more than soft leafy growth. A great fit when the aim is more flowers, stronger flowering response and a more productive bloom cycle.
Great for fruiting vines and berry-producing plants.
Suitable for berry crops and climbing fruiting plants that benefit from a bloom-and-fruit focused feed during active reproductive growth.
Well suited to controlled, high-performance growing systems.
A strong option for growers running more intensive feeding schedules, including greenhouse, protected cropping and commercial-style production where flowering and fruiting performance are the main focus.
Best used when plants move from green growth into production.
This is the kind of formula growers reach for when the goal shifts from vegetative growth to flowering, fruit development and crop performance. Especially useful once buds, flowers and early fruit begin to appear.
Choose a recipe (per 10 L), enter litres — we’ll calculate grams for each component.
I have switch from the seasol fertiliser i was using, to this advanced fruiting fertiliser and the results have been great my tomato produced alot more fruit this year with healither growth. Has been very good will continue to use
my third time buying this product so obviously I love it, my hydroponic tomatoes are thriving on this nutrient, I can't recommend it highly enough, fast delivery too
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You get three essential components that deliver complete nutrition for flowering and fruiting plants:
✔️ NPK 4-18-38 — High phosphorus and potassium for strong flowering, fruit set, and colour.
✔️ Calcium Nitrate — Builds firm fruit, prevents blossom end rot, and supports growth.
✔️ Magnesium Sulphate — Boosts chlorophyll, nutrient uptake, and overall plant health.
Fertilisers with a higher K value in the NPK ratio are considered high in potassium. Examples include NPK 4-18-38, 13-13-36, or 0-0-50, which deliver concentrated potassium to enhance fruiting, colour, and flavour.
At CompleteGrow, our NPK 4-18-38 + Calcium & Magnesium is a professional-grade high-potassium fertiliser designed for fruiting and flowering plants. It improves sweetness, firmness, and resilience across a wide range of crops — including tomatoes, peppers, citrus, and berries.
High-phosphorus and high-potassium fertilisers like NPK 4-18-38 combine the two most important bloom nutrients — phosphorus (P) for root and flower formation, and potassium (K) for fruit size, quality, and colour.
This balanced blend provides full bloom support, making it ideal for plants that need energy for flowering and fruit set, such as tomatoes, strawberries, capsicums, and citrus trees.
For Australian growers, CompleteGrow NPK 4-18-38 + Calcium & Magnesium is one of the best high-potassium fertilisers available. It’s crafted for consistent results in hydroponic and soil-based systems, ensuring improved fruit yield, colour development, and disease resistance across all major crops.
High-phosphorus fertilisers have a larger middle number in their NPK ratio — such as NPK 4-18-38, 10-52-10, or 10-30-20.
These blends encourage root growth, early flowering, and strong bud formation, making them ideal for fruiting and flowering plants.
For Australian growers, CompleteGrow NPK 4-18-38 + Calcium & Magnesium is a professional-grade fertiliser high in phosphorus and potassium, delivering powerful bloom and fruit performance.
Fruit trees require a fertiliser rich in phosphorus (P) and potassium (K) to support flowering, fruit set, and sweetness.
A formula such as NPK 4-18-38 provides the ideal nutrient balance for strong root systems and heavy fruit production, while helping prevent leaf drop and poor fruit colour.
When enhanced with Calcium & Magnesium, this blend offers professional-grade performance for citrus, mango, avocado, and stone-fruit trees — suitable for both hydroponic and soil-based growing systems.
