The dosage starts at around 2.5grams per 10 litres of water up to 10grams per 10 litres of water for a large plant. A 1kg bag would make an average of around 2000 litres of water.
The feed has been developed so it can be used in Coco, soil and hydroponic mediums and will achieve the same great results in any medium. The powder is made up of minerals and trace elements when in its powder form has an NPK value of 16-6-26 this will be lower once diluted. The Greenhouse Powder Feed should be diluted in water with a temperature of 18-22 degrees celsius and stired well for 2-3 minutes. - See more at: http://thehydrostore.co.uk/greenhouse-powder-feed---short-flower-1kg-bag-5050-p.asp#sthash.SHuFb52Z.dpuf