Many of our gardening customers prefer to get their casting in easy to handle bags. We screen and pack 10 Litre bags (weighing up to 8kgs). For many gardeners with fairly good soil a 10% boost of worm casting with a new planting is often far better than standard manures. This means a 10L bag is sufficient for a garden area of around 0.25m2. This is because worm casting has a higher percentage of most key minerals/elements such as Nitrogen, Calcium, Phosphorus, Potassium, Boron, Silica, Sulfur, etc in the correct balance, than most bagged manures and composts available commercially. The other reason is that the life is still in there. Our worm casting comes with the beneficial micro-organisms intact and often some baby worms all ready to do their work breaking down the minerals and nutrients to provide food for your plants. Take care when opening with inhalation of any dusts (unlikely due to moisture content).