Collection: Plant Boosters
Shop hydroponic plant boosters, additives and supplements for stronger growth, healthier plants, improved flowering and bigger yields.
Base nutrients supply the core building blocks for plant growth, but no single formula covers every requirement across a full crop cycle. Plant boosters and additives fill those gaps, supporting stronger root systems, healthier foliage, bigger blooms and better resistance to pest and environmental stress.
At A-Grade Hydroponics, our booster range is built to support every stage of growth — from propagation through to flowering — across coco coir, soil, DWC, NFT and other hydroponic systems.
What's in this Collection?
Root stimulant hydroponics additives for stronger propagation and early growth
PK booster for flowering, encouraging denser bud and fruit set
CalMag supplement for coco coir and other media prone to calcium and magnesium lockout
Bloom enhancers to improve fruit and flower set
Enzymatic additives that support root health and nutrient uptake
Organic plant booster options (fish and seaweed-based) for natural, gradual growth support
Choosing the right booster comes down to your plant's current stage and growing medium. Vegetative-stage boosters support root and leaf development; flowering-stage boosters like PK additives shift the plant's energy toward bud set. Coco coir growers typically need consistent CalMag, while DWC and NFT growers benefit from root stimulants and enzymatic additives to keep the root zone clean.
Plant Boosters & Additives for Hydroponic Indoor Plants
Shop hydroponic plant boosters, additives and supplements for stronger growth, healthier plants, improved flowering and bigger yields.
Plant boosters are nutrient additives that supplement your base feed to support specific growth stages — root development, vegetative growth or flowering. Whether you're growing your first tent of leafy greens or running a full flowering room, our range covers root stimulants, PK boosters, CalMag and enzymatic additives for coco, soil, DWC and NFT systems.
Base nutrients supply the core building blocks for plant growth, but they don't cover every requirement across a full crop cycle. Boosters fill those gaps — supporting stronger root systems, richer foliage, bigger blooms and better resistance to pest and environmental stress.
What's in this collection
Root stimulants for stronger propagation and early growth
PK boosters for bigger, denser flowering
CalMag supplements to prevent calcium and magnesium deficiencies
Bloom enhancers for improved fruit and flower set
Enzymatic additives to support root health and nutrient uptake
Organic boosters (fish and seaweed-based) for natural growth support
Vegetative vs. flowering boosters
Vegetative boosters focus on nitrogen uptake, root strength and leaf development, while flowering boosters like PK additives shift the plant's energy toward bud and fruit set. Match the booster to your plant's current growth stage rather than running the same additive throughout the cycle.
Synthetic vs. organic
Synthetic boosters (mineral salts) act quickly and are easy to dose precisely by EC. Organic boosters (fish, seaweed, humic extracts) work more gradually and support long-term soil or coco biology. If you're just starting out, a simple CalMag supplement is the easiest first addition to any base nutrient schedule.
Matching boosters to your growing medium
Coco coir benefits from consistent CalMag due to its cation exchange properties. DWC and NFT growers often prioritise root stimulants and enzymatic additives to keep root zones clean and oxygenated. Soil growers can lean more heavily on organic boosters to build medium-term biology.
All plant boosters at A-Grade Hydroponics are available online or in-store in Cheltenham, Melbourne. Our team can help you build a feeding schedule suited to your growing medium and crop stage.
WATCH YOUR A-GRADE REWARDS POINTS GROW…AND GROW!
At A-Grade Hydro, you can earn points through purchases, product reviews and referring friends!
Sign up now and starting growing!