What Types of Nutrients Do Worm Castings Contain?
Castings contain: 5 times the available nitrogen, 7 times the available potash and 1 1/2 times more calcium than found in 15cm of good top soil. Castings are supplied with available nutrients which are water soluble and immediately available to plant life. You will find that most potting soils have nutrient life of 2-5 days. Compost made from worm castings will last up to 6 times longer than other types of potting soils. You would need 5 times as much potting soil to do the same job as the worm castings. Worm castings are much cheaper and do a much better job. Worm castings hold 2-3 times their weight in water. That means you water less and the pot will stay damper for a longer period. Worm castings will not burn your plants; unlike using any fresh raw manures (cow, horse, etc.) which can burn root systems if it is not applied properly. ~Kids for Landcare: Wormwatch, Education Department of South Australia, 1992, p. 35. What Are Vermicomposting and Vermi Conversion? Kitsap E-Z Earth is
