Nitrogen (N) is one of the main building blocks for plants and is one of the three macro nutrients (N, P & K). Lack of nitrogen will limit plant growth because it is such an essential nutrient.
Flourish nitrogen provides nitrogen in two sources, Nitrate and ammonium. Ammonium is the preferred form of nitrogen for many plants; however, some plants can utilise nitrates as well and so both forms can be taken up. The ammonium is specifically complexed (kept in that form) and so will not convert into harmful ammonia.
2.5ml (half a cap) will treat 160 litres – twice a week