Royal Gold Tupur is the ideal growing media for plants that need frequent feedings. This mix contains porous particulars which can supply all major NPK with any nutrient system. Although it was originally developed for "slow drip" drain to waste systems, gardeners have enjoyed success in conventional and hydroponic style gardens and in containers of all sizes. Feed 1 to 6 times a day depending on the size of your container. 2 cubic feet.