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Optimum Grow A+B 5.5L Growth Technology


  • Australia’s most trusted hydroponic twin pack nutrient
  • Formulated by internationally renowned chemist, Carl Barry
  • Available in ‘Grow’ and ‘Bloom’ formulations
  • Unrivalled performance in all hydroponic systems
  • SIZES: 2 litre, 11 litre, 40 litre


Optimum Grow 2 Part

Optimum is a complete and balanced twin pack nutrient solution that supplies all the nutritional requirements for healthy hydroponic plant growth.  Especially designed for use in hydroponic systems with clay, perlite or rockwool growing media, Optimum was one of the first products introduced by Growth Technology over 20 years ago.

It remains one of Australia’s most trusted hydroponic nutrient solutions.

OPTIMUM – Twin pack hydroponic nutrient.
Want optimum results? Choose OPTIMUM – the Original and still the Best!
Optimum is one of Australia’s first and most trusted hydroponic nutrient solutions – an
Australian Classic and industry standard!
This complete and balanced twin pack formulation has been calculated to the highest possible standard of accuracy and is manufactured from the purest and most soluble mineral salts. The inclusion of chelates ensures vital micronutrients remain available to the plant even during pH fluctuations.
Available in 2 distinct formulations, OPTIMUM supplies all the nutritional requirements for healthy plant growth.
OPTIMUM Grow is formulated to supply the needs of the plant during the vegetative stage of its growth cycle. High levels of nitrate-nitrogen encourage rapid leaf and shoot growth, maximizing the young plant’s potential to produce fruit and flowers later in its GROWTH STAGE

Optimum Grow
CONDUCTIVITY (EC) 1.5 – 2.0 mS 2.0 – 2.5 mS
pH 5.8 – 6.2 6.0 – 6.5
 Gradually increase the nutrient strength during each cycle ie, start on 1.5mS during the Vegetative growth stage and gradually increase it to 2.0mS towards the end of the stage,
 DO NOT IGNORE pH. Certain minerals can become inaccessible to the plant when the pH of the solution is outside the recommended range. If using a pH Test Kit, aim for ‘6’.

Both Grow and Bloom have an ‘A’ part and a ‘B’ part. These must be added in equal amounts as per instructions to maintain the ideal nutrient profile for the plant.
 Re-circulated nutrient tanks should ideally be changed once a week in order to maintain the optimum mineral nutrient profile in the tank.

Additional information

Weight 12.0 kg
Dimensions 25 × 27 × 33 cm


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