Zoo Gro Manure, straw, food scraps Composted for 16 weeks Derived only from non meat-eating animals (herbivores) Size 30 litre Features and Benefits A royalty included in the cost of every bag goes back to the Zoo Ideal, nutritious compost for all garden beds Completely organic with no added nutrients or other chemicals Great all round soil conditioner Well composted to eradicate weed seeds and other contaminants