The biggest knock you'll hear against worm castings fertilizer is that they only have a 1-0-0 Nitrogen/Phosphorus/Potassium ratio (NPK). However, unlike chemical fertilizers, the nutrients in worm castings are released slowly over time, and time-released nutrients don't count in the NPK rating.
The most comprehensive guide to worm castings and how to choose the right. Worm castings tea is a liquid mixture that you can make with water, molasses .
The humus in the worm castings extracts toxins and harmful fungi and bacteria from the soil. The worm castings have the ability to fix heavy metals in organic waste. Worm Castings act as a barrier to help plants grow in soil where the pH levels are too high or too low.