Soluble powder organic growth fertiliser, NPK 7-2-8

Of the 7.5% nitrogen it contains, 7.3% is of plant origin. This organic nitrogen is not directly available to plants: micro-organisms first mineralise it into ammonium and then into nitrate, which the roots absorb. In soil, the soil life carries out this work, and does so all the faster when the soil is rich in organic matter and organisms. In biological hydroponics, also known as bioponics, the solution does not contain these micro-organisms to begin with, and you must introduce them yourself.

In hydroponics and on coco fibre, dissolve 0.25 g per litre at the first roots, 0.5 g at the first true leaves, then 0.8 to 1.2 g during full growth. At pre-flowering, the dose is reduced to 0.6 g per litre, and you add the same quantity of the flowering version NPK 3-6-9, which then takes over on its own. In soil, doses are slightly lower, from 0.2 to 1 g per litre. Start at the lower end of the range, as the powder is highly concentrated.

In addition to its nitrogen, the formula provides 8.4% potassium oxide, 2.3% calcium oxide, 2.4% magnesium oxide, and 14% sulphur trioxide, along with boron and chelated copper, iron, manganese, and zinc. Its phosphorus content, 2.4%, is intentionally low, since it is the bloom version NPK 3-6-9 that supplies the bulk of this element. With 28% organic carbon, it also feeds the microbial life in your grow medium, which in turn drives mineralisation.