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PREMIUM QUALITY

Only the best for your grow

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Nutrients & Additives

Give your plants the fuel they need to thrive.

Browse our complete range of plant nutrients and additives, formulated for both soil-based and hydroponic systems. From base nutrients and bloom boosters to root stimulants, foliar sprays, and microbial inoculants, we’ve got every stage of plant growth covered.

💧 Suitable for all growing media
🌿 Backed by real-world experience & expert advice
🧪 Trusted brands, proven results, great value

Grow smarter with high-performance nutrients and additives from Hydro Oasis, no matter how you grow.

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Hydro Oasis Nutrients & Additives Mascots
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-20%
GT Foliage Focus - 250mL — Liquid Nutrient for Lush Foliage Growth (Ferns Palms & Tropicals)
GT Foliage Focus - 1L — Liquid Nutrient for Lush Foliage Growth (Ferns Palms & Tropicals)
GT Foliage Focus - 5L — Liquid Nutrient for Lush Foliage Growth (Ferns Palms & Tropicals)
GT Foliage Focus - 20L — Liquid Nutrient for Lush Foliage Growth (Ferns Palms & Tropicals)

Growth Technology

GT Foliage Focus

Feed your greenery the perfect formula for vibrant, long-lasting foliage.

Size
From $7.99
$9.99 From $7.99
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-10%
Plant Mechanics Mega PK - All Sizes — Bioavailable PK Flowering Enhancer for Bloom Density
Plant Mechanics Mega PK - 250mL — Bioavailable PK Flowering Enhancer for Bloom Density
Plant Mechanics Mega PK - 1L — Bioavailable PK Flowering Enhancer for Bloom Density
Plant Mechanics Mega PK - 5L — Bioavailable PK Flowering Enhancer for Bloom Density
Plant Mechanics Mega PK - 20L — Bioavailable PK Flowering Enhancer for Bloom Density

Plant Mechanics

Plant Mechanics Mega PK

Supercharge bloom phase with this universal, powerful PK booster.

Size
From $17.99
$19.99 From $17.99
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-10%
Green Planet Root Builder - 1L — Bacillus Root-Zone Inoculant for Soil Structure & Defence
Green Planet Root Builder - 5L — Bacillus Root-Zone Inoculant for Soil Structure & Defence

Green Planet

Green Planet Root Builder

A microbial ally that builds resilient root systems and healthier plants.

Size
From $44.99
$49.99 From $44.99
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-10%
Green Planet Massive Bloom - 5L — Premium Bloom Enhancer for Flower Size Weight & Aroma
Green Planet Massive Bloom - 20L — Premium Bloom Enhancer for Flower Size Weight & Aroma

Green Planet

Green Planet Massive

A true bloom maximiser that delivers exceptional flower size, weight, and quality.

Size
From $22.49
$24.99 From $22.49
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-10%
Plant Mechanics LED Fuel - All Sizes — Late-Stage Bloom Enhancer for LED & Full-Spectrum Lighting
Plant Mechanics LED Fuel - 250mL — Late-Stage Bloom Enhancer for LED & Full-Spectrum Lighting
Plant Mechanics LED Fuel - 1L — Late-Stage Bloom Enhancer for LED & Full-Spectrum Lighting
Plant Mechanics LED Fuel - 5L — Late-Stage Bloom Enhancer for LED & Full-Spectrum Lighting
Plant Mechanics LED Fuel - 20L — Late-Stage Bloom Enhancer for LED & Full-Spectrum Lighting

Plant Mechanics

Plant Mechanics LED Fuel

Unlock potent, flavour-rich final flowers with optimised photosynthetic performance under LED light.

Size
From $17.99
$19.99 From $17.99
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-10% Back-Order
Optic Foliar Overgrow RTU - 1L — All-in-One Foliar Spray with NPK Aminos & B1 Vitamins

Optic Foliar

Optic Foliar Overgrow

Spray it, see it, be-leaf it.

Size
$31.49
$34.99 $31.49
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-10% Back-Order
Green Planet Dual Fuel Starter Kit - Boxed — Two-Part Base + Massive Bloom & Vitathrive Additives
Green Planet Dual Fuel Starter Kit - Contents — Dual Fuel 1 & 2 Massive Bloom & Vitathrive bottles

Green Planet

Green Planet Dual Fuel Starter Kit

The perfect kit for a full crop cycle, streamlined, affordable, and effective.

Size
$112.49
$124.99 $112.49
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-20%
GT Silica - 250mL — Potassium Silicate for Cell Wall Strength & Stress Resistance
GT Silica - 1L — Potassium Silicate for Cell Wall Strength & Stress Resistance
GT Silica - 5.5L — Potassium Silicate for Cell Wall Strength & Stress Resistance
GT Silica - 20L — Potassium Silicate for Cell Wall Strength & Stress Resistance

Growth Technology

GT Silica

Give your plants armour from within, silicon strengthens, protects, and boosts performance.

Size
From $7.99
$9.99 From $7.99
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-10%
Green Planet Rezin - 1L — Terpene & Flavour Enhancer for Aromatic Bloom & Resin Production
Green Planet Rezin - 5L — Terpene & Flavour Enhancer for Aromatic Bloom & Resin Production
Green Planet Rezin - 20L — Terpene & Flavour Enhancer for Aromatic Bloom & Resin Production

Green Planet

Green Planet Rezin

A finishing touch that maximises aroma, flavour, and resin quality.

Size
From $62.99
$69.99 From $62.99
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-20%
FloraMax OrganaBud - All Sizes — Kelp-Based Floral Enhancer for Bud, Branching & Aroma
FloraMax OrganaBud - 250ml — Kelp-Based Bloom Additive for Floral Density & Aroma
FloraMax OrganaBud - 1L — Kelp-Based Bloom Additive for Floral Density & Aroma
FloraMax OrganaBud - 5L — Kelp-Based Bloom Additive for Floral Density & Aroma
FloraMax OrganaBud - 20L — Kelp-Based Bloom Additive for Floral Density & Aroma
FloraMax Organabud - 1000L — Kelp-Based Bloom Additive, Commercial Bulk Drum

FloraMax

FloraMax OrganaBud

Elevate flower structure and aroma with a kelp-based additive that runs clean and performs consistently.

Size
From $18.00
$22.50 From $18.00
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-10%
Green Planet Dual Fuel 1+2 - 1L — Two-Part Base Nutrient System for Seed-to-Harvest
Green Planet Dual Fuel 1+2 - 5L — Two-Part Base Nutrient System for Seed-to-Harvest
Green Planet Dual Fuel 1+2 - 20L — Two-Part Base Nutrient System for Seed-to-Harvest

Green Planet

Green Planet Dual Fuel 1+2

The easiest way to deliver professional‑grade nutrition across the full plant life cycle.

Size
From $31.49
$34.99 From $31.49
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-10%
Green Planet Liquid Weight - 1L — Bloom-Phase Carbohydrate Additive for Microbial Energy
Green Planet Liquid Weight - 5L — Bloom-Phase Carbohydrate Additive for Microbial Energy
Green Planet Liquid Weight - 20L — Bloom-Phase Carbohydrate Additive for Microbial Energy

Green Planet

Green Planet Liquid Weight

A carbohydrate and resin enhancer that powers bloom performance.

Size
From $40.49
$44.99 From $40.49
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-10%
Green Planet GP3 Bloom - 1L — GP3 3-Part Bloom Base Nutrient for Flowering Stage
Green Planet GP3 Bloom - 5L — GP3 3-Part Bloom Base Nutrient for Flowering Stage
Green Planet GP3 Bloom - 20L — GP3 3-Part Bloom Base Nutrient for Flowering Stage

Green Planet

Green Planet GP3 Bloom

A powerful bloom base designed to deliver denser, more aromatic harvests every cycle.

Size
From $22.49
$24.99 From $22.49
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-10%
Green Planet Pro Cal - 1L — Chelated Calcium Magnesium & Iron Supplement with Trace Elements
Green Planet Pro Cal - 5L — Chelated Calcium Magnesium & Iron Supplement with Trace Elements
Green Planet Pro Cal - 20L — Chelated Calcium Magnesium & Iron Supplement with Trace Elements

Green Planet

Green Planet Pro Cal

The essential Cal-Mag support your plants need for strength, vitality, and consistent harvests.

Size
From $22.49
$24.99 From $22.49
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-10%
Plant Mechanics Super Si - All Sizes — Mono-Silicic Acid Silicon Additive with Bioactive Aminos
Plant Mechanics Super Si - 20mL — Mono-Silicic Acid Silicon Additive for Plant Strength
Plant Mechanics Super Si - 100mL — Mono-Silicic Acid Silicon Additive for Plant Strength
Plant Mechanics Super Si - 250mL — Mono-Silicic Acid Silicon Additive for Plant Strength
Plant Mechanics Super Si - 500mL — Mono-Silicic Acid Silicon Additive for Plant Strength
Plant Mechanics Super Si - 1L — Mono-Silicic Acid Silicon Additive for Plant Strength
Plant Mechanics Super Si - 5L — Mono-Silicic Acid Silicon Additive for Plant Strength

Plant Mechanics

Plant Mechanics Super Si

Accelerate crop structure and yield with pH-stable, highly absorbable silicon.

Size
From $17.99
$19.99 From $17.99
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-20%
FloraMax Flowering Enhancer - All Sizes — PK Bloom Booster with Cal-Mag & pH Buffer
FloraMax Flowering Enhancer - 250ml — 3-in-1 Bloom Booster with PK, Cal-Mag & pH Buffer
FloraMax Flowering Enhancer - 1L — 3-in-1 Bloom Booster with PK, Cal-Mag & pH Buffer
FloraMax Flowering Enhancer - 5L — 3-in-1 Bloom Booster with PK, Cal-Mag & pH Buffer
FloraMax Flowering Enhancer - 20L — 3-in-1 Bloom Booster with PK, Cal-Mag & pH Buffer
FloraMax Flowering Enhancer - 1000L — 3-in-1 Bloom Booster, Commercial Bulk Drum

FloraMax

FloraMax Flowering Enhancer

One bottle does the job of three; yielding cleaner, simpler grow cycles with consistent bloom performance.

Size
From $19.99
$24.99 From $19.99
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-10%
Dr Greenthumbs Root Roids - 50g — Mycorrhizal & Bacterial Biostimulant for Root-Zone Biology
Dr Greenthumbs Root Roids - 75g — Mycorrhizal & Bacterial Biostimulant for Root-Zone Biology
Dr Greenthumbs Root Roids - 225g — Mycorrhizal & Bacterial Biostimulant for Root-Zone Biology

Dr Greenthumbs

Dr Greenthumbs Root Roids

A living inoculant that delivers faster growth, healthier plants, and bigger yields.

Size
From $31.49
$34.99 From $31.49
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-10%
Green Planet GP3 Micro - 1L — GP3 3-Part Micro Base with Nitrogen Calcium & Chelated Traces
Green Planet GP3 Micro - 5L — GP3 3-Part Micro Base with Nitrogen Calcium & Chelated Traces
Green Planet GP3 Micro - 20L — GP3 3-Part Micro Base with Nitrogen Calcium & Chelated Traces

Green Planet

Green Planet GP3 Micro

The essential micronutrient base to keep crops strong, balanced, and high-performing.

Size
From $26.99
$29.99 From $26.99
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-10%
Xtreme Gardening MYKOS - All Sizes — Granular Rhizophagus Intraradices Mycorrhizal Inoculant
Xtreme Gardening MYKOS - 100g — Granular Rhizophagus Intraradices Mycorrhizal Inoculant
Xtreme Gardening MYKOS - 9.1kg — Granular Rhizophagus Intraradices Mycorrhizal Inoculant

Xtreme Gardening

Xtreme Gardening Mykos

Promotes healthier roots for stronger, more efficient growth.

Size
From $13.49
$14.99 From $13.49
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-10%
Plant Mechanics Root Booster V2 - All Sizes — Hormonal Root Stimulator with Auxins & Cytokinins
Plant Mechanics Root Booster V2 - 250mL — Hormonal Root Stimulator with Auxins & Cytokinins
Plant Mechanics Root Booster V2 1L — Hormonal Root Stimulator with Auxins & Cytokinins
Plant Mechanics Root Booster V2 - 5L — Hormonal Root Stimulator with Auxins & Cytokinins

Plant Mechanics

Plant Mechanics Root Booster V2

Lay the foundation for vigorous growth with this multi-stage root and shoot stimulant.

Size
From $35.99
$39.99 From $35.99
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-10%
Green Planet Bud Booster - 60g — Powdered Bloom Additive with High-Strength PK 50-30
Green Planet Bud Booster - 500g — Powdered Bloom Additive with High-Strength PK 50-30
Green Planet Bud Booster - 1kg — Powdered Bloom Additive with High-Strength PK 50-30
Green Planet Bud Booster - 5kg — Powdered Bloom Additive with High-Strength PK 50-30

Green Planet

Green Planet Bud Booster

A reliable bloom enhancer for bigger, more productive flowers.

Size
From $8.99
$9.99 From $8.99
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-10%
Green Planet Back Country Blend Grow - 100g — Slow-Release Granular Veg Base for Outdoor Soil
Green Planet Back Country Blend Grow - 5kg — Slow-Release Granular Veg Base for Outdoor Soil
Green Planet Back Country Blend Grow - 10kg — Slow-Release Granular Veg Base for Outdoor Soil
Green Planet Back Country Blend Grow - 20kg — Slow-Release Granular Veg Base for Outdoor Soil

Green Planet

Green Planet Back Country Blend Grow

 
Size
From $4.49
$4.99 From $4.49
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-20%
FloraMax Root XS - All Sizes — Root Stimulator for Propagation, Transplanting & Early Veg
FloraMax Root XS - 250ml — Root Stimulator for Fast Root Expansion in Hydro & Coco
FloraMax Root XS - 1L — Root Stimulator for Fast Root Expansion in Hydro & Coco
FloraMax Root XS - 5L — Root Stimulator for Fast Root Expansion in Hydro & Coco
FloraMax Root XS - 20L — Root Stimulator for Fast Root Expansion in Hydro & Coco
FloraMax Root-XS - 1000L — Root Stimulator for Propagation, Commercial Bulk Drum

FloraMax

FloraMax Root-XS

Give your plants an ultra-clean start with root support engineered for speed and reliability.

Size
From $27.99
$34.99 From $27.99
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-5%
H&G Cocos A+B - 1L — Two-Part Base Nutrient for Coco Coir Substrates (40%+ Coco)
H&G Cocos A+B - 5L — Two-Part Base Nutrient for Coco Coir Substrates (40%+ Coco)
H&G Cocos A+B - 10L — Two-Part Base Nutrient for Coco Coir Substrates (40%+ Coco)
H&G Cocos A+B - 20L — Two-Part Base Nutrient for Coco Coir Substrates (40%+ Coco)

House and Garden

H&G Cocos A+B

Maximise plant health and yields with a nutrient system designed for coco growers.

Size
From $47.49
$49.99 From $47.49
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