Thanks for gathering the information in an easy to use article but I need to clarify something which may be important for some. I am familiar with the cannabis trade and its pretty common for plants to receive HIGH levels of fertilizers while the plants are growing which could collect in the stalks. If you opt for hemp bedding, ask the supplier if the bedding is from a cannabis crop or raised as a pure hemp crop. There is a big difference between the two crops. No crop is safe from pesticide if grown outside because insects as we know can destroy one in no time. Cannabis crops are no exception.