(1)

‘growing medium’ means a product other than soil in situ, the function of which is for plants, including algae, or mushrooms to grow in;

(2)

‘soil improver’ means a product, including mulch, the function of which is to maintain, improve or protect the physical or chemical properties, the structure or the biological activity of the soil to which it is added;

(3)

‘mulch’ means a type of soil improver used as protective covering placed around plants on the topsoil whose specific functions are to prevent the loss of moisture, control weed growth, help moderate soil temperature and reduce soil erosion.