Worm castings is a truly amazing product for your soil. The main benifits improved plant growth, flowering and yield. Many university studies have been made that have shown significant yield increases as well as improvements in taste and appearance.
Worm castings will improve the quality of your soil, increasing biological activity and even repelling insects. Several microorganisms that are found in worm castings produce chitinase, that repels a wide variety of insects.
Blending Worms castings into the soil is the best. Add 10-20% worm castings to your soil. If you plants are already potted, then you can add the worm castings as a top dressing, sprinkle lightly on the top and water it in.
Note: Do not over use Worm castings, Maximum 20% for best results.