Heavy Weight Potash is a soluble potash with 13%w/v Phosphorous and 15%w/v Potassium. Heavy Weight can be used in soil and in hydroponic systems at the rate of 10ml per litre for soil grown plants and 2ml per litre for hydroponically grown plants. Heavy Weight is designed to boost flower and fruit set. The result after using Heavy Weight should be longer flower set, particularly in roses and increased flavour in fruit and vegetables. Heavy Weight should be used at the onset of flowering. Available in 1 litre, 5 litre and 20 litres.