Sawdust
Sawdust is inexpensive, readily available, and has many practical uses in the garden. Sawdust is acidic, making it a good mulch choice for acid-loving plants such as rhododendrons and blueberries.
Using sawdust for mulch can be an easy and economical choice. It is also a great product to use in horse stables, butchers can use it on the floor of their shops, great in chicken coops, clean up oil spills or help absorb damp areas and can be used in some pubs on the floors.