Growth Media can be made of anything that will hold a plants root structure. Remember growing cress in cotton wool at school? Well, in hydroponics, we use all sorts of different growth media for different applications.
Growth Media is used throughout a plants life cycle, from seedlings to cuttings and through to adulthood - plants need a growth media to establish their root structure.
Different growth medias have different benefits. Some growth media come with essential nutrients and minerals already in them, reducing the need for use of nutrients and nutrient additives. Other growth medias are completely inert, meaning they have no nutritional value, hence you add the nutrients your plant requires using a selection of nutrients and nutrient additives, giving you more control. Some growth medias come with water holding porous rock, which means if the growth media starts to run dry there is some water still stored within it.
Holland Hydroponics stock an extensive range of growing media to suit all your specialist gardening needs!