AgraWool is a new product which offers to be a biodegradable and natural alternative to oasis/floral foam.
It is highly absorbant and holds water for much longer than convential foam. It can be cut to fit any container.
Created using finely ground basalt rock combined with sucrose which is then heated to a very high temperature to form a "wool".
According to the manufacturers instructions it is safe to discard the used block in your home compost bin.