What Are Worm Castings?
Worm Castings are a nutrient-rich compost that has been refined by worms to have a neutral pH and excellent water holding capacity. Humic substances within the Worm Castings act as chelating agents that enhance the availability of micronutrients to your plants, while the negative surface charge of organic materials within our Worm Castings provides additional cation exchange sites for the retention of nutrient cations.
In addition to this, the substrate maintains an active complex community of decomposer organisms which in addition to earthworms, may include enchytraeids (pot worms), nematodes, protozoans and countless microorganisms. Amongst the microcosm of microbes, include rock phosphate solubilizing actinomycete microbes (which are responsible for the petrichor smell when it rains).
Earthworm Castings have been shown to have a Mycorrhizal spore density upward of 4 times that of conventional NoTill field soil. As a result, the worm castings in your soil mix will cause the micro life in the container to act as vectors for viable Mycorrhizal fungi propagules to inoculate your plant roots with AMF.
How Do I Use Worm Castings?
For Top Dressing: You can’t use too much! Distribute the desired amount of castings into the mulch layer.
As Compost: We recommend you use worm castings as ⅓ of your soil mix, with the remainder composed of ⅓ base and ⅓ aeration.
For Aerated Compost Tea: Add 1-2 cups of worm castings into an appropriate filter bag and suspend it in a solution of 10L water into which air is being bubbled (bubble air into water for up to two hours before adding the castings). Allow the tea to brew for 48 hours at 15-25 degrees celcius. Use within 6 hours of the brew finishing.