Growth Technology Optimum Grow A & B | 2-Part Vegetative Nutrient | 2x1L, 2x5.5L, 2x20L

Australia’s Original Hydroponic Nutrient — Built for Explosive Vegetative Growth

Growth Technology Optimum Grow A & B is one of Australia’s first and most trusted hydroponic nutrient solutions — an industry standard that’s been delivering exceptional vegetative results for decades. Formulated to the highest standard of accuracy from the purest, most soluble mineral salts, it drives rapid leaf and shoot development during the vegetative stage, building the strongest possible plant structure before flowering begins.

Why Growth Technology Optimum Grow Is an Australian Classic

• 🌱 High nitrate-nitrogen levels — the primary veg-stage element that fuels rapid leaf, shoot, and root development, maximising the plant’s potential to produce fruit and flowers later in its life
• 🌱 Precision mineral formulation — calculated to the highest possible standard of accuracy for consistent, reliable results every cycle
• 🌱 Purest, most soluble mineral salts — clean mixing, no sludge, no residue in your system
• 🌱 Chelated micronutrients — remain available to the plant even during pH fluctuations, so nothing is wasted
• 🌱 Suits all hydroponic systems — especially recommended for NFT, flood & drain, and recirculating systems with perlite or clay
• 🌱 Trusted by Australian growers for decades — the benchmark that other veg nutrients are measured against

How to Mix & Use Optimum Grow

1. Fill your reservoir with fresh water
2. Add Optimum Grow A at 4ml per litre and stir thoroughly
3. Add Optimum Grow B at 4ml per litre and stir thoroughly
4. If using additives, add them before final pH adjustment
5. Adjust pH to between 5.8 and 6.2

⚠️ Always add A and B in equal parts. Never mix A and B together undiluted.

Target EC: 1.5–2.0 mS/cm during vegetative growth. Start at 1.5 mS/cm and gradually increase to 2.0 mS/cm as plants develop. Change recirculating reservoir weekly to maintain an optimal mineral profile.

Important Tips

• Gradually increase EC through the veg cycle — start at 1.5 mS/cm and ramp up slowly as plants establish
• Never ignore pH — minerals become inaccessible outside the 5.8–6.2 range; check every feed
• Change your reservoir weekly in recirculating systems to prevent mineral imbalance build-up
• Add additives before adjusting pH — always do your final pH check after everything is in the tank

Optimum Grow vs Optimum Bloom

Optimum Grow is high in nitrate-nitrogen for rapid vegetative development. When your plants transition to flower, switch to Growth Technology Optimum Bloom A & B — formulated with reduced nitrogen and elevated phosphorus and potassium for bud initiation and flower development.

Get Even More From Your Veg

• GT Fulvic — adds an organic component that enhances nutrient uptake and root zone activity from day one
• GT Silica — strengthens cell walls for more vigorous, resilient plants through the veg stage
• GT Super PK — switch to this at flower alongside Optimum Bloom for maximum bud weight and quality

Choose the Right Size

• 2x1L — ideal for home growers and small hydroponic setups
• 2x5.5L — great value for regular growers running multiple veg cycles
• 2x20L — best value for large-scale grows and commercial operations

By Growth Technology — proudly Australian, trusted by hydroponic growers nationwide for decades.