Worm Castings

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 manure (cow, horse, etc.) 

 

 

https://rodaleinstitute.org/science/articles/vermicomposting-for-beginners/

 

https://www.allthingsorganic.com/blog/how-castings-help-drought