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 life.