10 Litres of all natural and organic worm castings are made just outsie of Calgary by millions of tiny farms hands (red wiggler worms). Add castings to your garden or lawn as a top dressing (1/4cm thick) or throw some in the transplanting hole for your spring annuals, perennials, shrubs and trees. For indoor plants add 1/4 cup of castings to a 10gallon pot. Castings never "burn" your plants, and you can never add too much. In Stock now! Available in the bag (as shown), or in a reusable icre cream bucket.